Every update, documented.

• From audit to evidence: reviewed all 212 public URLs in the sitemaps, then handled the confirmed issues as small, separately verified changes rather than one risky bulk rewrite.
• Clearer page identity: corrected conflicting titles and descriptions, repaired article-template copy that had leaked between topics, aligned breadcrumbs and visible FAQ content, and refreshed stale tool-count and release wording.
• More trustworthy structured data: corrected Schema types and malformed JSON-LD text, completed required article fields, synchronized page claims with visible content, and verified all 547 JSON-LD blocks parse successfully.
• Stronger crawl and mobile foundations: repaired viewport behavior, checked 7,697 internal links and resource references, confirmed every public page is reachable from the homepage within two clicks, and synchronized sitemap modification dates and llms.txt inventory data.
• Production verification: all 212 sitemap URLs passed the static audit; 95 BlogPosting records contain their core publishing fields; five sitemap files parse correctly; and representative pages passed desktop and mobile browser checks without horizontal overflow, script errors, or structured-data failures.
• No tool behavior changed: this release improves discoverability, consistency, and machine-readable metadata without changing the processing logic of ToolKnit tools. Historical publication dates and privacy/legal wording that require source evidence or an explicit policy decision remain documented for separate review instead of being guessed.

• Progressive tool browsing: the All Tools catalog now starts with a focused selection and reveals more tools in clear batches, shortening the first mobile browse without removing any tool from the page.
• Search and categories stay complete: every category continues to show its full set of tools, and a search always reveals every matching result instead of limiting the result set to the initial batch.
• Bilingual and accessible controls: the visible-count and reveal action follow the current English or Chinese interface, announce updates politely, and keep all tool links present in the source for direct access and indexing.

• Background Remover: manual cleanup, transparent-edge trimming, and export keep the existing local-AI and WebGPU/WASM fallback behavior while moving the heaviest trim scan work away from interaction-critical UI work.
• Silk Screen: preview rendering and PNG export now use a dedicated Worker where the browser supports it, with a compatible Canvas fallback for every other browser.
• Compress PDF: target-size searches reuse prepared source pages instead of re-rendering the original PDF for each candidate, reducing repeated work and keeping the existing byte-limit verification intact.
• PDF to Word: OCR preprocessing now runs in a dedicated Worker. Standard A4 and Letter scans retain the previous 3x render quality, unusually large pages are bounded safely, and an automatic Canvas fallback preserves compatibility.
• Reliable rollout: the offline cache now precaches the current scripts and Workers for all four updated tools, so the deployed code and the cached code stay aligned.

• A clearer local-AI setup: the first run now explains that the pinned, self-hosted @imgly/background-removal v1.5.5 engine may download up to 109.5 MB of AI model and WebAssembly resources. The download begins only after confirmation, can be reused from the browser cache, and never sends image pixels away from the device.
• More capable mask refinement: restore or erase areas with adjustable brush size and edge softness, undo or clear edits, hold to compare with the original, and inspect details with fit, zoom, and pan controls across mouse, touch, and pen input.
• Flexible preview and export: review the cutout against transparent, white, black, or custom backgrounds; auto-trim transparent edges; add a margin; feather the final edge; and export at full resolution as PNG, WebP, or background-filled JPG.
• Safer production limits: added real image decoding checks, a 20 MB file limit, device-aware pixel and Canvas budgets, cleaner resource release, and guardrails that stop images and exports before unsafe browser limits are exceeded.
• Open-source transparency: published the exact upstream commit, source archive, AGPL-3.0 license, third-party notices, artifact manifest, hashes, and a reproducible build recipe. The relevant terms, permanent page links, and offline cache now point to the same records.
• Faster inference and dependable editing: compatible Chrome and Edge builds now use WebGPU automatically with a safe WASM fallback, while a lower-memory 1024px mask pipeline removes the previous full-resolution PNG round trip. The manual editor now opens on the final cutout with Remove Residue selected, and a fresh cache version restores every translated control after deployment.
• Release references synchronized: refreshed bilingual copy, accessibility labels, structured data, sitemaps, Service Worker assets, and llms.txt so users, browsers, and indexing systems describe the same production behavior.
• Availability incident — resolved: Cloudflare returned 526 Invalid SSL Certificate for several hours after the origin certificate renewal was missed and automatic renewal had not been configured. The certificate has been renewed and service restored. Automatic renewal plus expiry and renewal-failure alerting are recorded as follow-up work on the status page.

• A complete v1.2 showcase: rebuilt the desktop page around more than 30 local PDF, image, audio, video, text, calculator, creative, and AI workflows, with dedicated coverage for CLI and MCP access.
• Open development, easier to follow: downloads now lead directly to GitHub Releases, the source repository is always one click away, and the page retrieves the current GitHub star count with a resilient fallback.
• Support from the first screen: added a discreet “Buy the developer a coffee” button that opens ToolKnit’s donation story page.
• English and Chinese throughout: the new page, including the support action, switches cleanly between both languages and remains usable on compact mobile screens.

• Three distinct visual templates: Paper, Noir, and Editorial now give the Daily Planner a clean print look, a high-contrast poster option, and a magazine-style layout.
• Fixed formats that travel well: choose 9:16 Story, 4:5 Post, or A4 Print. Long entries now wrap automatically and continue onto clear, numbered pages instead of running out of bounds.
• Better export coverage: download the current page as PNG, collect multi-page planners in a ZIP, or create a standard multi-page PDF directly in the browser.
• Clearer bilingual discovery: refreshed the English and Chinese guidance, FAQ, and structured metadata so the template, aspect-ratio, wrapping, and print features are easier to understand before planning.
• Compress Image to an exact upper limit: choose common upload caps from 50 KB to 10 MB or enter a custom value. Every successful target-size result is checked against its real encoded bytes before it can be downloaded.
• Quality before dimensions: the image compressor searches for the best fitting JPG or WebP quality first and only reduces dimensions proportionally when necessary. Transparent PNGs remain transparent, and an optional Smart WebP mode is available when compatibility allows.
• Truthful batch results: the selected cap applies to each image, not the whole ZIP. Files that cannot honestly meet it, including oversized animated GIFs that must retain every frame, are visibly excluded rather than mislabeled as successful.
• Compress PDF to a strict maximum: choose a common limit or enter any target from 50 KB to 50 MB. The compressor searches for the closest readable result below that ceiling and verifies the completed PDF's actual byte size before enabling download.
• Clear, honest failure handling: an original PDF already within the limit is kept unchanged. If even the minimum safe render cannot meet the selected size, ToolKnit reports that outcome instead of offering an oversized file as a success.
• Transparent document trade-off: target-size mode rebuilds every page as an optimized JPEG image. The page appearance is preserved, while searchable text, links, forms, bookmarks, and accessibility tags are intentionally not carried into the compressed copy.

• Whiteboard V3: rebuilt the drawing workspace around Fabric’s object model for dependable selection, movement, resizing, layering, text editing, image handling, and undo/redo.
• More reliable sessions: added automatic local recovery, clearer layer controls, responsive mobile tools, and refreshed offline caching for the upgraded whiteboard experience.
• Open-source momentum: one day after ToolKnit Desktop v1.0 was open-sourced, the project passed 150 GitHub stars and its Douyin launch post reached 300,000 views with more than 6,400 likes.

• Image Stitcher Chinese card restored: versioned the homepage language loader so the newly released Image Stitcher card consistently loads its Chinese title and description instead of inheriting an older cached language bundle.
• Reliable language refresh: synchronized the homepage, hero demo, and offline cache with the latest Chinese locale bundle so newly added tool cards cannot be left untranslated by a stale browser cache.

• Complete public directory: restored seven missing live-tool links in the What Is ToolKnit? overview, covering Lyric Visualizer, ASCII Art, ASCII Banner, Emoji Finder, Spin the Dare, Breathing Relaxation, and Quit Smoking Tracker.
• Accurate category copy: refreshed the Self-Test section so the private Quit Smoking Tracker is represented alongside the Emotional Neglect Test.
• One release checklist: added an authoritative new-tool workflow that separates mandatory site-wide synchronization from conditional work such as blogs, new categories, large dependencies, desktop parity, and IndexNow.
• New tool — Image Stitcher: arrange local images into a seamless vertical long image or horizontal strip, control shared sizing, spacing and background, then download a PNG or JPG. Composition and export use Canvas/OffscreenCanvas entirely in the browser.
• Connected PDF workflow: completed PDF to Image results now offer a direct handoff to Image Stitcher. Ordered page-image Blobs are transferred locally through short-lived IndexedDB storage, without URL payloads or uploads.
• ToolKnit Desktop is now open source: release downloads now open from the official GitHub v1.0.0 release, and the full desktop repository is available at ZihangDong/toolknit-desktop.
• Current operational references: synchronized the public directory, site maps, offline cache, public stats and release documentation for 92 functional pages, including 91 dedicated tools and the World Holidays Hub.

A professional upgrade for PDF to Image is now complete, combining a safer processing foundation with faster page selection, clearer output planning, and more reliable downloads.

• Safer PDF processing: upgraded this converter’s PDF.js engine to the patched, self-hosted version 4.10.38
• No runtime CDN dependency: PDF.js and JSZip are now served directly by ToolKnit, reducing third-party availability and loading risks for this page
• Reliable cancellation and cleanup: stopping or resetting a conversion now cancels active rendering and releases PDF documents, workers, canvases, and temporary Blob URLs
• Honest conversion feedback: complete success, partial success, full failure, and cancellation now have distinct states so users always know what happened
• Cleaner bilingual result states: fixed the screen-reader completion announcement appearing as visible text above the footer, and kept completed conversion messages synchronized when switching between English and Chinese
• Precise page selection: convert every page, a typed range, odd or even pages, or choose from low-memory visual thumbnails in 12-page batches
• Professional output controls: added 72, 150, 300, and custom 36–600 DPI, white or transparent backgrounds, editable output names, and zero-padded page numbers
• Output preview before conversion: the first selected page now shows its expected pixel dimensions, approximate file size, page count, and render load with high-memory warnings and hard canvas limits
• Scalable results: converted images are displayed 12 at a time with accurate dimensions and file sizes, contain-fit previews, accessible lightbox navigation, and focused retry controls for failed pages
• Password-protected PDFs: users can enter or retry a PDF password in a bilingual, keyboard-accessible dialog instead of receiving a dead-end error
• Better mobile saving: added iOS share support, split ZIP packages for large output sets, safe total-size thresholds, and mobile layouts that avoid horizontal overflow and floating-control collisions
• More stable ZIP downloads: archive generation now streams files without wasteful image recompression and keeps download URLs alive long enough for browsers to save them reliably
• Less silent local data: removed the hidden browser history that previously retained PDF filenames, file sizes, and preview thumbnails

Mic/Camera search intent cleanup: the existing tool and troubleshooting article now have clearer, complementary roles without changing either URL.

• Tool intent preserved: the live Webcam & Mic Test remains focused on immediately checking a camera preview, microphone meter, and connected devices
• Troubleshooting intent strengthened: the companion guide now leads with black-screen, silent-microphone, denied-permission, wrong-device, and Zoom/Teams/OBS conflict fixes for Chrome, Edge, Firefox, Safari, Windows, macOS, iOS, and Android
• Accurate browser technology wording: clarified that the test uses MediaDevices.getUserMedia() for a local stream without creating a peer-to-peer call, recording media, or uploading the stream
• Consistent discovery signals: synchronized the article title, description, Open Graph, Twitter Card, BlogPosting, FAQ, Breadcrumb, blog index card, sitemap date, and offline cache

Responsive crop reliability: the first production-audit fixes now keep crop geometry stable across desktop and mobile layouts.

• Image Crop: preserved the selected source-image region when moving between desktop and mobile widths, eliminating the inverted scaling that enlarged or collapsed the crop box
• Circle Crop: aligned the circle overlay and drag coordinates with the Canvas’s actual displayed size, so the selection remains centered, fully visible, and accurate after responsive resizing

Safer shared PDF workflows: expanded the patched PDF.js foundation to four more production tools while preserving their existing bilingual interfaces and output behavior.

• Self-hosted PDF.js 4.10.38: upgraded Merge PDF, Compress PDF, PDF to Word, and AI to PNG from the older 3.11.174 runtime
• Hardened document loading: disabled dynamic PDF JavaScript evaluation and standardized local Worker, character-map, and standard-font resources across all four workflows
• Reduced third-party runtime risk: AI to PNG now loads JSZip directly from ToolKnit for multi-artboard ZIP downloads instead of depending on a public CDN, with the new PDF assets synchronized into the offline cache
• Cleaner resource lifecycle: completed PDF documents are explicitly released after page counting, rendering, conversion, or reset to reduce memory retained during repeated use
• Production regression coverage: verified a six-page merge, three-page compression, three-page Word export, three-artboard AI conversion, ZIP readiness, and 390 px mobile layouts without console errors or horizontal overflow

Background Remover first-run and memory hardening: rebuilt the AI setup path so new visitors can understand, defer, or start the model download without leaving the tool.

• Same-page first-run setup: the AI model prompt now appears only when background removal is requested; choosing Not Now closes it cleanly, while Download & Continue resumes the pending image on the same page
• Accurate download disclosure: synchronized the setup dialog, loading state, tips, FAQ, and structured data around the actual maximum of 109.5 MB for the model and WebAssembly resources
• Pinned local AI engine: replaced the runtime CDN import with a self-hosted @imgly/background-removal 1.5.5 bundle and fixed local model path, reducing third-party availability and supply-chain risk
• Memory-bounded refinement: replaced twenty full RGBA undo copies with one-channel mask snapshots governed by 12 MiB mobile and 32 MiB desktop budgets, with older states released automatically
• Safer image limits: kept the 20 MB file cap and added decoded-image ceilings of 8 megapixels on constrained devices and 16 megapixels on desktop before AI processing begins
• More compatible PNG saving: result downloads now use a short-lived document-backed link before it is removed, avoiding browsers that ignore clicks on detached download elements

HEIC and image orientation reliability: tightened two everyday image workflows around predictable output, bounded memory use, and accurate format guidance.

• HEIC to JPG: added 20-file, 25 MB per-file, and 100 MB batch limits before decoding, plus device-aware pixel ceilings before decoded results are retained or displayed
• Complete HEIC results: multi-frame files now preserve every decoded frame, mixed batches show explicit success and failure cards, previews release temporary URLs, and Download ZIP creates one predictable archive
• Self-hosted HEIC decoder: pinned heic2any 0.0.4 locally and synchronized it with the offline cache instead of relying on a runtime CDN
• Flip & Rotate Image: enforced the stated 50 MB limit plus device-aware decoded-pixel ceilings, rejected animated GIF instead of silently flattening it, and moved decoding away from base64 Data URLs
• Accurate export behavior: PNG now preserves transparency and rendered pixels, while JPG uses a white background and 92% quality; metadata and animation limitations are clearly disclosed in both languages and structured data
• Lower export memory: replaced base64 export with Blob generation, bounded temporary URL lifetimes, and released image and Canvas resources when starting over

Crop, merge, and silk-screen reliability: completed the next production-audit fixes across four image and PDF workflows.

• Image Crop and Circle Crop: added the stated 50 MB limit, mobile and desktop decoded-pixel ceilings, visible damaged-image errors, safe empty-Blob handling, and an explicit warning that animated GIF exports keep only the first frame
• Safer crop downloads: removed broken iOS-only variable references, kept native share support, allowed the same failed file to be selected again, and corrected mislabeled Popular Tools links in the Image Crop footer
• Merge PDF validation: corrupted or encrypted PDFs are rejected before entering the file list, successful additions are counted per batch, and a merge that skips a file now reports partial completion with accurate success, failure, and page totals
• Silk Screen HEIC support: connected the self-hosted HEIC decoder directly to the tool, added visible format, file-size, pixel, decode, and export errors, and kept all processing on the user’s device
• Meaningful LPI controls: changed dot density to effective five-LPI steps with a continuous pixel-grid mapping, so adjacent low- and high-density settings now produce visibly different output
• Responsive preview and protected export: controls render against a 1200 px preview for smoother adjustment, while PNG export re-renders from the original image at full size when safe and uses an explicit device-aware megapixel ceiling for larger files
• Lower halftone memory: reduced channel masks from four bytes to one byte per pixel, tightened rotated-grid bounds, merged rapid slider events, and releases temporary full-size canvases after export
• Site text integrity: completed a UTF-8 audit across all 215 HTML pages and restored truncated compression ranges and footer copy in Compress Image and JPG to PNG

Image-to-PDF and batch compression hardening: completed another production-audit pass across two high-use image workflows.

• Real image validation: Image to PDF and Compress Image now reject damaged or unsupported files after an actual browser decode instead of accepting fake dimensions or failing later
• Device-aware batch budgets: added per-file, file-count, total-byte, per-image pixel, and total-pixel limits before expensive Canvas or PDF work begins
• Safe user filenames: removed filenames from dynamic HTML templates, added accessible remove and download labels, and guaranteed unique names for separate PDFs and ZIP entries
• Honest compression results: files that become larger after re-encoding now keep their originals and display Original kept instead of a misleading negative or zero-percent saving
• Transparency and animation protection: PNG alpha is checked across the entire image, while animated GIFs remain unchanged so no frames are silently discarded
• Resilient mixed batches: one failed image no longer cancels every other compression result; completion feedback reports successful, unchanged, and failed files accurately
• Local ZIP runtime: both tools now use ToolKnit’s pinned local JSZip 3.10.1 build, with cleaner Blob URL and Canvas lifecycles
• Authority milestone: ToolKnit’s Ahrefs Domain Rating has reached 42, and the homepage badge now reflects the latest verified score

Homepage discovery redesign: rebuilt the first-screen tool discovery experience around faster scanning, clearer trust signals, and a calmer responsive layout.

• Focused new hero: introduced concise everyday-work copy, a low-contrast animated workflow canvas, live tool and article totals, the verified Ahrefs DR 42 signal, and ToolKnit’s FMHY Multi Tool Sites recognition
• Desktop category rail: moved category filtering into a fixed left-side text navigation aligned with the main content grid, using a restrained white selection marker and no decorative container
• Context-aware navigation: the category rail follows users through the tool library, then gives way to an accessible back-to-top control before the How It Works section
• Focused mobile category rail: replaced uneven multi-row controls with a single swipeable text rail that preserves each label’s natural width, centers the selected category automatically, and uses a quiet white underline instead of pills or button backgrounds
• Bilingual mascot positioning: the spider now follows the tool-count label’s live position, preserving a consistent gap when English copy wraps, Chinese copy changes height, fonts finish loading, or the viewport is resized
• New social sharing artwork: restored the missing shared Open Graph image with a new 1200 × 630 ToolKnit preview, so homepage, tool, blog, holiday, and supporting-page links can once again display a consistent branded card
• Preserved production signals: retained the homepage URL, canonical, English SEO metadata, structured data, bilingual switching, light and dark themes, search behavior, all 91 tool cards, and existing analytics

Status and release-history consistency: corrected the public authority signal and made the long changelog easier to navigate.

• Current authority rating: updated the Status page’s stale Ahrefs Domain Rating from 41 to the verified value of 42
• Persistent timeline navigation: moved sticky positioning to the complete timeline sidebar, keeps the active date visible inside the list, and provides a fixed mobile date button with an overlay menu that does not shift the article

Homepage footer refinement: improved tool discovery and added a quiet personal signature without changing the surrounding category layout.

• Seven rotating Popular Tools: the homepage footer now selects seven unique tools from the complete tool catalog on each visit, while retaining seven crawlable fallback links when JavaScript or the data request is unavailable
• Bilingual creator credit: added a restrained heart signature below the X and GitHub links for “Made with love in China · Zihang Dong,” with a natural Chinese translation and matching light-mode styling
• Verifiable FMHY recognition: added a bilingual trust note beneath the showcase badges that links directly to ToolKnit’s listing in FMHY’s Multi Tool Sites directory without overstating the relationship
• Fast native sharing: added a responsive Share ToolKnit action that opens the device share sheet when supported, falls back to copying the canonical homepage link, and provides localized accessible feedback
• Centered mobile Friends links: aligned the homepage’s wrapped footer partnership links with the centered copyright row, matching the established tool-page footer behavior on narrow screens

Six-format image conversion hardening: rebuilt the shared conversion core used by JPG, PNG, and WebP format tools around safer inputs, resilient batches, and predictable downloads.

• Six tools upgraded together: hardened JPG to PNG, PNG to JPG, JPG to WebP, PNG to WebP, WebP to JPG, and WebP to PNG without changing their URLs, English SEO metadata, or bilingual architecture
• Real format and decode validation: verifies JPG, PNG, and WebP file signatures, rejects disguised or damaged files, detects declared dimensions before full decoding when possible, and blocks device-unsafe pixel workloads
• Bounded batch processing: enforces 20 files, 20 MB per file, device-aware total-byte limits, per-image pixel ceilings, and total decoded-pixel budgets before conversion
• Resilient partial completion: one bad image no longer stops a valid batch; bilingual failure summaries identify each rejected file, while cancellation stops cleanly after the current image
• Safer dynamic output: filenames now render only as text, duplicate output names receive deterministic suffixes, Canvas encoders must return a non-empty Blob with the requested MIME type, and ZIP contents are verified before download
• Transparent PNG/WebP to JPG controls: users can choose white, black, or a custom background color instead of receiving an unexplained default, with controls translated live between English and Chinese
• Animation and metadata clarity: animated WebP files are rejected before frames can be silently discarded, and both languages explain that Canvas output removes EXIF, GPS, ICC, and similar embedded metadata
• Local, pinned ZIP runtime: all six pages now load ToolKnit’s self-hosted JSZip 3.10.1 build, while source, result, ZIP, image, and Canvas resources are released through explicit lifecycle cleanup

Image Resizer production hardening: strengthened the single-image resize workflow around validated inputs, predictable output, and clearer format behavior.

• Real file validation: verifies JPG, PNG, WebP, BMP, and static GIF signatures, confirms the browser can decode the image, and rejects damaged files or animated GIF, PNG, and WebP assets before frames can be lost
• Device-aware safety limits: enforces the stated 20 MB file cap, decoded-image pixel ceilings, 1–10,000 px dimensions, and bounded output-pixel workloads before creating a large Canvas
• Transparent-to-JPG control: users can choose white, black, or a custom JPG background, while PNG preserves transparency and lossy-format quality controls stay disabled when they do not apply
• Reliable output lifecycle: validates non-empty Canvas output and MIME type, releases replaced source and result URLs, clears large Canvas buffers, and uses safe source-derived filenames for downloads and iOS sharing
• Accurate bilingual guidance: synchronized accepted formats, animation and metadata limitations, large-image expectations, validation feedback, responsive controls, and persisted-language mobile navigation in English and Chinese

Image Grid Split production hardening: rebuilt the fixed 3×3 workflow around exact pixel coverage, bounded memory use, and truthful output guidance.

• Pixel-perfect tile coverage: distributes remainder pixels across the nine PNG tiles so every source pixel is included exactly once and neighboring tiles differ by no more than one pixel
• Honest shape guidance: clearly warns when a non-square source will create rectangular tiles, links directly to Image Crop, and removes claims for custom grid sizes or equal square output that the tool does not provide
• Real format validation: verifies JPG, PNG, WebP, BMP, and static GIF signatures and decoded dimensions, while rejecting damaged files and animated GIF, PNG, or WebP assets before frames can be lost
• Device-aware safety limits: enforces the stated 20 MB file cap, decoded-pixel and dimension ceilings, minimum 3×3 input size, and mobile or desktop ZIP budgets before expensive work begins
• Lightweight previews: replaces nine permanent full-resolution canvases and Data URLs with bounded 180 px Blob previews, preserving full resolution only when each numbered PNG tile is exported
• Reliable local ZIP export: reuses one Canvas across all nine tiles, validates every PNG Blob and ZIP entry, uses the self-hosted JSZip 3.10.1 build, and releases temporary image, Canvas, and URL resources
• Verified bilingual behavior: tested WebP input, reset and reselection, large-image preview, file limits, exact remainder sizing, ZIP completion, and 390 px English and Chinese layouts without tool errors

Word-to-PDF production hardening: completed the final page in the 22-tool PDF and image audit with safer DOCX validation, bounded rendering, and accurate output disclosure.

• Truthful image-based output: title-adjacent guidance, workflow copy, FAQ, social metadata, and structured data now explain that each previewed page becomes an image in the PDF, so text, links, bookmarks, and accessibility structure are not retained
• Real DOCX validation: enforces the stated 20 MB limit, verifies the ZIP signature and required Word package entries, rejects damaged or disguised files, and guards against excessive entry counts or expanded package sizes
• Device-aware rendering budgets: limits pages, per-page pixels, total capture pixels, expanded document memory, and final PDF size, while reducing capture scale automatically for larger safe documents
• Lower conversion memory: replaces per-page base64 Data URLs with validated JPEG Blobs and binary image data, releases each Canvas immediately after insertion, and removes off-screen rendering containers in success, failure, and cancellation paths
• Reliable cancellation and recovery: users can stop long conversions between expensive stages, keep the validated preview, and retry without stale result state or leaked render resources
• Pinned local conversion stack: Word to PDF now loads self-hosted JSZip 3.10.1, docx-preview 0.3.3, html2canvas 1.4.1, and jsPDF 2.5.1 builds instead of depending on three public CDNs at runtime
• Production regression coverage: verified a two-page DOCX preview and conversion, damaged and oversized input rejection, a real 30-page cancellation, the 60-page desktop ceiling, and 390 px English and Chinese layouts without tool errors

After six weeks of careful, page-by-page work, ToolKnit’s entire tool collection has completed its migration to the shared modern architecture.

• Migration complete: all 91 functional pages — 90 dedicated tools plus the World Holidays Hub — now use the new architecture
• Preserved each tool’s core behavior and English SEO while adding consistent bilingual interfaces, responsive navigation, Related Tools, and the shared interactive footer
• Completed the final Creative and Self-Test migrations, then brought the Holidays Hub into the same system
• Reworked the Holidays Hub into a more compact responsive layout so users can scan countries, filters, and results with less vertical scrolling
• Synchronized the tool and page sitemaps, llms.txt, deployment documentation, and Service Worker cache, then prepared the completed migration URLs for IndexNow

ToolKnit has been accepted into FMHY, the internet’s largest free-resource library, while the final legacy tool pages move rapidly toward the shared bilingual architecture.

• FMHY listing: Multi Tool Sites — ToolKnit - Image / Video / PDF / Audio / File
• Advanced the new-architecture migration to 83 of 91 functional pages, leaving 8 legacy pages across Creative and Self-Test
• Completed the bilingual Creative-architecture migration for CPS Test, Random Spinner, and Color Picker, preserving their original functionality and English SEO
• Standardized the three pages with bilingual FAQ content, Related Tools, the shared interactive footer, remembered language choice, and mobile-safe hero navigation
• Fixed Color Picker’s mobile menu so tapping outside it closes the panel without shifting the page layout, then advanced the Service Worker cache to toolknit-v235
• Prepared the next phase: finish the remaining migrations, then refine the UI and add small, focused functional improvements

Completed a full consistency audit across all 66 bilingual tool pages and repaired the remaining gaps in the shared architecture.

• Added visible bilingual FAQ sections to 8 tools and matching FAQPage structured data to 9 tools
• Added safe-area viewport support to 33 migrated pages and removed 5 hidden legacy navigation blocks
• Updated Lyric Visualizer to the standard footer grid, removed a duplicate Related Tools loader, and connected its full Chinese UI to the remembered language setting
• Fixed a corrupted keyboard shortcut and invalid HTML tags in Emotional Neglect Test
• Fixed malformed Metronome structured data and two broken bilingual registration contracts in AI to PNG and Compress Video
• Fixed Compress PDF results for already-optimized files so the panel and download filename clearly show that the original file is being kept
• Removed UTF-8 BOM headers from 25 pages, including duplicate markers on 15 pages, and restored two corrupted default tool icons
• Completed public statistics display-name coverage for all 91 functional pages
• Normalized titles and meta descriptions across all 211 indexed pages to the project’s SEO length targets, filled missing robots and Open Graph metadata, and corrected stale tool counts and malformed privacy structured data
• Verified that all dedicated tool, blog, holiday, and core-page URLs are covered by the split sitemaps, and confirmed that llms.txt links to all 90 dedicated tool pages without broken local targets
• Cleaned duplicate and obsolete Service Worker entries, verified every local precache target, synchronized document language metadata, and advanced the cache to toolknit-v224

The Tool

Added Text to Speech — a free online TTS tool that converts text to natural speech using Microsoft Edge's neural voice service. No API key, no signup required. Just type, pick a voice, and hit generate.

Features

• 69 neural voices across 19 languages (English, Chinese, Japanese, Korean, French, German, Spanish, Arabic, Hindi, Thai, Vietnamese, and more)
• Adjustable rate, pitch, and volume with real-time slider controls
• Voice preview — sample any voice before generating the full text
• Language filter pills for quick voice browsing by language
• MP3 download — save generated speech as an audio file
• Automatic voice fallback — if a voice is unavailable, the server automatically retries with a known-good voice from the same language
• Full bilingual support (EN/中文) with standard new-architecture template
• SEO-optimized: HowTo schema, Use Cases section, Supported Languages section, enhanced meta tags, and noscript fallback

Technical Notes

• Server-side architecture: Node.js TTS server using the msedge-tts package, running as a systemd service on port 3210
• PHP proxy: /api/tts.php forwards requests to the Node.js server via cURL, keeping the API on the same origin
• ttsController state machine: Centralized state management (idle → loading → playing → paused) with AbortController for cancellable requests and full resource cleanup on page unload
• Voice fallback system: 27 locale-specific fallback voices tested and verified — if a requested voice fails, the server automatically retries with a known-good alternative from the same language
• MP3 output: AUDIO_24KHZ_48KBITRATE_MONO_MP3 format for broad browser compatibility
• Text length limit: 5,000 characters with live character counter and estimated duration
• Memory-safe: Object URLs revoked on cleanup, audio paused and src cleared on page unload, all fetch requests abortable

The Problem

• iOS Safari’s long-standing limitation: the browser ignores the download attribute on <a> tags pointing to blob: or data: URLs. Instead of triggering a file download, Safari opens the content in its built-in viewer — PDFs render in the PDF previewer, images open fullscreen, and videos launch the native player — with no obvious way for users to save the file to their device.
• Android Chrome and desktop browsers were completely unaffected — downloads worked fine everywhere except iOS Safari, making this a silent bug that only iPhone/iPad users encountered.
• The report came from a Douyin (TikTok) community member who pointed out that the Image-to-PDF tool could not download the generated PDF on their iPhone. That single report uncovered a site-wide pattern affecting 26 different tools.

The Fix

• Implemented a unified dual-path download strategy across all affected tools: on iOS, interception uses the Web Share API (navigator.share()) to invoke the native iOS share sheet, where users can tap “Save to File”. On all other platforms, the existing <a download> behavior remains unchanged.
• iOS detection uses a three-factor check: User-Agent (iPad|iPhone|iPod), navigator.platform, and navigator.maxTouchPoints — this correctly identifies iPadOS 13+ desktop-class Safari, which spoofs a Mac user-agent string.

Tools Fixed (26 Total)

PDF Tools (7)

• Image to PDF, Compress PDF, Word to PDF, Merge PDF, Invoice Generator, Whiteboard (PNG + PDF export), Daily Planner (PNG + PDF export)

Image Tools (13)

• Compress Image, Convert Image (all 6 format pages: JPG↔PNG↔WebP), Background Remover, Circle Crop, Flip Image, HEIC to JPG, AI to PNG, Image Crop, Signature Maker, Silk Screen, Ask Fate (share card), Chart Maker (PNG + JSON + HTML), Video Screenshot

Video & Audio Tools (6)

• Compress Video, Text Animation Maker (WebM + MP4), Video to GIF, Video to Audio, MP3 to WAV, WAV to MP3

Infrastructure

• All JS file version numbers bumped per-tool for cache-busting (e.g. compress-image.js?v=2 → v=3). Service Worker cache version advanced: v192 → v213 across the session.
• Deployed incrementally tool by tool to minimize risk — each fix verified before moving to the next.

Newline Character Bug Fix

• Full-site audit of all 90+ tool pages revealed 3 files with a stray `n character rendered in the page footer: Compress Image, Image to PDF, and What to Eat?.
• The artifact appeared between the tracker.js and sound-effects.js script tags, likely a leftover from a batch editing operation.
• All 3 files cleaned and verified — zero occurrences remain across the entire site.

Chinese Search Support

• All 90 tools now support Chinese keyword search on the homepage. Each tool entry received a data-zh-keywords attribute with relevant Chinese search terms (e.g. "图片压缩, 压缩图片, jpg压缩").
• Search logic updated to match against both English and Chinese keyword sets simultaneously, making the site fully bilingual-search capable.
• SEO-safe implementation: Chinese keywords are stored in HTML data attributes only — not rendered in the UI — so the English-first page structure and SEO remain completely unaffected.

Noise Generator SEO & Feature Optimization

• SEO overhaul: Title expanded to target long-tail keywords (sleep, focus, relaxation). Meta description and keyword list enriched with tinnitus, meditation, baby sleep, ADHD focus, and office privacy use-cases. Schema date bumped to 2026-07-19.
• 3 new content sections added: "When to Use Each Noise Type" (7-card grid), "The Noise Color Spectrum Explained" (white/pink/brown scientific breakdown), and "Who Uses This" (5 user personas: remote workers, insomniacs, new parents, tinnitus sufferers, meditators).
• FAQ expanded from 5 to 10 questions (tinnitus relief, brown vs white for sleep, baby safety, meditation, battery drain).
• New structured data: FAQPage expanded to 10 items, new HowTo schema added for the 3-step guide.
• Blog cross-link added below FAQ: "Read the Full Guide: Choosing the Best Noise for Sleep, Focus & Relaxation" pointing to blog/noise-generator.html.

Noise Generator Feature Upgrades

• Real-time audio visualizer: Canvas-based frequency-bar animation connected to the AnalyserNode. Bars respond to the master output — subtle white bars on dark background with intensity-driven opacity. Appears below the Play button during playback, fades out when paused.
• Custom sleep timer: New number input field accepts any value 1–480 minutes. Press Enter or blur the field to activate.
• Save custom presets: "Save Current Mix" button stores the current slider/toggle configuration to localStorage. Saved presets appear as clickable buttons with delete (×) support. Persists across sessions.
• Keyboard shortcuts: Keys 1–7 toggle individual channels. Space bar unchanged (Play/Pause). Both shortcuts avoid firing when focused on input fields.
• State persistence: Volume levels, toggle states, and master volume are saved to localStorage and restored on page reload.

Merge PDF — Biggest Feature Update Since Launch

• Multi-Page Selector (WPS-Style): When you upload PDFs with multiple pages, a dialog asks whether to include all pages or hand-pick specific ones. Choosing "Select Pages" opens a full-screen overlay with a left file panel + right page thumbnail grid — select only the pages you need from each multi-page PDF before merging. Full select-all / deselect-all controls, batch pagination (20 pages per batch), and a re-select button on each file card to edit your choices later. At least 1 page per file is enforced with inline validation.
• Custom Output Filename: A new input field appears after uploading files — type your desired filename before merging (e.g., "Q4-Report"). The input auto-fills from the first PDF's name, and `.pdf` is appended automatically if missing. No more renaming after download.
• Detailed Result Summary: After merging, the download area now shows exactly what was combined: "You merged 'report.pdf' and 'summary.pdf' into 'my-merge.pdf'. 2 files combined into 1 PDF with 8 pages." Full Chinese + English i18n with proper file-name list formatting (Oxford comma in English, Chinese enumeration marks in zh).
• SEO Optimization: Title upgraded to "Merge PDF Online – Combine PDFs Free". Meta description, OG tags, Twitter card, and Schema.org WebApplication all synced. Blog cross-link ("Read the Guide") added below the FAQ section pointing to blog/merge-pdf.html.
• PDF.js Lazy-Load & Zero SEO Impact: The page preview engine (pdf.js ~400KB gzip) loads via a delayed <script> tag that fires only after the page is fully parsed — it does not block rendering and search engines never download it. Page thumbnails only render when the user triggers the page selector.
• Safeguards & Polish: Concurrent upload lock prevents race conditions when adding multiple file batches. Cancel button restyled as a white capsule with dark text for better contrast in the dialog.

New Blog Guide — Mic & Camera Test

• Blog "How to Test Your Webcam & Microphone Online — Free Pre-Meeting Check" published under the Guides category (count: 01 → 02). Includes FAQPage schema (7 Q&A pairs), BreadcrumbList, step-by-step HowTo markup, and cross-links to Keyboard Tester, Aim Trainer, and Reaction Time Test.
• Tool page cross-link added on tools/mic-camera-test.html pointing to the new blog guide.
• All infrastructure files updated: sitemap-blog.xml (97 entries), llms.txt (blog count updated), blog/index.html (Guide category), changelog timeline + entry, service-worker.js (v192 → v199 across the day).

Homepage Light Mode — Three Button Visibility Fixes

• Download Desktop App button had `rgba(255,255,255,.08)` background + white text, invisible against the hero area in light mode. Fixed to black-on-black styling that stays visible in both modes.
• Articles popup cards (Blog Guides / Tool Tales / Changelog) used `var(--surface)` = `rgba(0,0,0,.035)` which blended into the white popup background in light mode. Border and surface intensified for contrast.
• Footer icon buttons (Contact Us / Developer's Story / Changelog — injected by footer-modals.js) had `rgba(255,255,255,.03)` background with dim icons, nearly invisible on the gray footer. Changed to deep neutral tones visible in both themes.

What is ToolKnit Blog Page — Full Redesign

• Removed all emoji icons from the tool grid. Replaced with clean Markdown-style directory lists — two columns per category, each tool name + small category tag (PDF/IMG/VID/AUD/TXT/TIME/FUN/AI/TEST/CALC).
• Added anchor-jump table of contents at the top for one-click navigation to any category section.
• Technology stack section converted from a plain <ul> into a code-block styled card with monospace font, line-number styling, and syntax-highlight-like comment colors.
• Simplified category descriptions to one-sentence summaries for faster scanning.

Infrastructure

• Dynamic article counts: changelog.html hero now dynamically counts `.changelog-entry` elements (currently 62). Homepage badges corrected from hardcoded 141 → actual 157 (87 blog guides + 9 tool tales + 61 changelog entries at time of fix). Build script `_count-site.js` added for pre-deployment count syncing.
• Service worker comment syntax fix: Malformed `/**` block missing its closing `*/` corrected (IDE linter warning resolved).

• Ask Fate — complete overhaul: the tool is no longer a simple fortune oracle. It’s now a multi-mode decision & divination toolkit covering three distinct search-intent groups.
• Three modes: Magic 8 Ball (classic 20-answer pool with 8-ball theme), Oracle (55+ rich answers with crystal-ball theme), and Coin Flip (pure Yes/No/Maybe). One page, three semantic fields, covering magic 8 ball online, yes or no oracle, and decision maker search queries.
• Answer pool expanded & fixed: 55 → 100+ answers across Positive/Neutral/Negative/Wisdom categories. Fixed duplicate icon issue and replaced hash-based selection with stratified random (25% per tone), ensuring fairer distribution.
• Share card generator: Canvas-drawn social sharing cards — question + answer + icon + ToolKnit branding. One-click download as PNG or share to X (Twitter).
• 30-day history archive with past-day summary UI, replacing the single-day localStorage approach.
• Sound effects integrated for answer reveals.
• SEO metadata fully rewritten: title, description, keywords, OG tags, Twitter Card, JSON-LD SoftwareApplication & FAQPage — optimized for Magic 8 Ball, Yes No Oracle, and Decision Maker search clusters.
• UX copy fix: “One Question Per Day” → “New Answers Daily” — more accurate and less intimidating for new users.
• Pro Tips & Footer alignment with site standard (matched to pdf-to-image.html layout).
• Whiteboard — major feature expansion: three new capabilities added to the drawing board.
• Dark/light canvas toggle: switch between white (#ffffff) and deep indigo (#1a1a2e) canvas background. All 5 hardcoded fill references unified into a canvasBg state variable, and eraser color automatically syncs. Pixel-level background replacement preserves all strokes.
• Shape library expanded & fill mode: new Circle, Triangle, and Arrow shape tools (in addition to existing Line and Rectangle). Fill Toggle button lets users switch between outline and solid mode for any shape. C keyboard shortcut added for Circle.
• Layer Manager panel: toggleable side panel showing all canvas objects (Background + Text + Image layers). Each layer supports select / lock / delete from the panel. On mobile, the panel drops below the canvas instead of covering it. Auto-refreshes on add, delete, and lock/unlock actions.
• Performance fix: added willReadFrequently: true to canvas context, silencing the browser console warning.
• Full-site copyright fix: 20 tool pages — ? 2026 → © 2026 across all footers. Root cause: PowerShell Set-Content -Encoding UTF8 corrupts the U+00A9 byte. Switched to © HTML entity site-wide to permanently avoid this encoding bug.
• Server infrastructure migration: server migrated to new hosting, deployment docs updated, SSH key re-established after migration.
• Deployment SOP hardened: toolknitSkill.md updated with strict single-file SCP rule (no wildcards, no multi-file), Chinese/Emoji encoding best practices, and the © entity mandate.
• Docs hygiene: 16 MD files → 10 after audit. Three migration documents merged into one architecture-migration-guide.md. 4 obsolete planning docs cleaned. Blog post drafts (already published to Juejin/dev.to) removed.
• Whiteboard viewport accessibility fix: removed user-scalable=no from meta viewport (Google Page Experience best practice).

• Dice Roller major upgrade — 6 new features: the dice roller is no longer a simple random number generator. It’s now a full dice toolkit.
• Batch Auto-Roll: roll 10×, 50×, or 100× with a real-time progress bar. Dice update in smooth batches via requestAnimationFrame.
• Game Presets: one-click presets for Monopoly (2d6), Yahtzee (5d6), Catan (2d6), Craps (2d6), and D&D Skill Checks (3d6).
• CSV Export: download your entire roll history as a CSV file for further analysis.
• Theoretical Probability Overlay: the distribution chart now shows a semi-transparent blue bar at 16.67% on each face — compare your real rolls against the expected fair-die distribution.
• 3 Dice Skins: Classic White, Dark Gold, and Neon Blue color themes — switch with a single click.
• Custom scrollbar for roll history — replaced the ugly native scrollbar with a subtle 4px dark one.
• Keyboard shortcuts card: first-time visitors see a floating hint showing Space to roll, 1-6 to pick dice, R to reset. Dismisses automatically after 4 seconds.
• Sound effects integrated for both single rolls and batch operations.
• Viewport accessibility fix: removed user-scalable=no and maximum-scale=1.0 from the meta viewport tag (Google Page Experience best practice).
• SEO metadata fully rewritten: title, description, OG tags, Twitter Card, JSON-LD SoftwareApplication, FAQPage — all optimized for richer search snippets and better CTR.
• Full-site SEO data files audited & refreshed: sitemap index lastmod dates updated to July 8, sitemap-pages lastmod refreshed, llms.txt Dice Roller entry rewritten with all new features.

• New tool: Breathing Relaxation — the 90th tool! Free guided deep breathing with 6 proven techniques: 4-7-8 breathing, box breathing, coherent breathing (5-5), 4-2-4 relaxation, energizing breath, and alternate nostril breathing. Visual animation with real-time rhythm indicators, optional sound cues, and haptic feedback (iOS). Cycle count selection from 4 to 12 rounds. Locked during active sessions to prevent errors. Clean, distraction-free design with Phosphor icons. 100% browser-based.
• Category count bug fixed: filter badges on the homepage now dynamically count tool cards from the DOM instead of relying on hardcoded numbers. Adding a new tool no longer requires manual count updates.
• Breadcrumb fix: Quit Smoking Tracker breadcrumb corrected from wrong "Health & Wellness" to correct "Self-Test" category (HTML schema + JS i18n keys).
• Sitemap restructured: single monolithic sitemap.xml replaced with a sitemap index pointing to 4 logical sub-sitemaps:
  — sitemap-tools.xml (89 tool pages)
  — sitemap-blog.xml (blog index + 97 articles)
  — sitemap-holidays.xml (holidays hub + 15 country pages)
  — sitemap-pages.xml (homepage, desktop download, changelog, status, legal)
• Priority differentiation: high-traffic tools (Compress PDF, Background Remover, Merge PDF, Compress Image, Password Generator, QR Code Generator, Image Resizer, PDF to Image, Age Calculator, Unit Converter) upgraded to priority 1.0. Niche tools (AI Text Adventure, AI Trajectory, Lyric Visualizer, Silk Screen, Spin the Dare) kept at 0.8. All others at 0.9.
• Changefreq calibrated: changelog → daily, homepage & blog → weekly, tools → monthly, legal → yearly.
• llms.txt enhanced: added a dedicated Popular Tools section (10 tools with LLM-friendly guidance), corrected tool count to 90, blog count to 96, and moved Quit Smoking Tracker into Self-Test category.
• Tool count: 89 → 90.
• Phosphor Icons migrated to local hosting: all icon fonts (Fill, Regular, Bold) now served from /assets/fonts/ and /assets/css/, eliminating CORS errors that blocked font loading from unpkg CDN across all 88 tool pages.
• Encoding disaster & full-site garbled text cleanup: a careless PowerShell batch edit with Set-Content (default ANSI encoding) corrupted UTF-8 across the entire /tools/ directory. 116+ occurrences of broken Unicode fixed — en-dashes (–), degree symbols (°) restored, “中文” language toggle labels repaired across 65 pages, and ~250 inline Chinese i18n dictionary keys rebuilt in 7 severely damaged files (webp-to-png, image-crop, image-resizer, jpg-to-png, image-grid-split, emoji-finder, and 4 others). The PowerShell lesson: always add -Encoding utf8.
• SEO tag audit & repair: fixed 11 tool pages missing the “ToolKnit” brand name in their <title> tags. Text Animation Test page received a full SEO retrofit: added <h1>, JSON-LD BreadcrumbList schema, og:image, and twitter:image. Removed text-animation.html from the tools directory (it was a CSS demo, not a production tool). Sitemap count corrected accordingly.
• Ahrefs crawl errors fixed: added nginx 301 redirects — /tools/stories.html → /blog/stories.html (external backlink pointing to wrong path), and /tools/ → / (directory index 403 resolved). Both verified with curl.

• New tool: Quit Smoking Tracker — one-click to log every resisted craving. Real-time stats: cigarettes avoided, money saved, life regained (11 min per cigarette), tar avoided. 10 achievement badges and a 10-stage health recovery timeline based on CDC/WHO research. All data stays in localStorage.
• Bilingual migration complete: PDF Suite (5 tools), Image Tools (17), Video Tools (4), Audio Tools (6), Text Tools (10), Calculator Tools (7), Time Tools (6) — 55 tools now fully bilingual (EN + Chinese). Progress was faster than expected.
• Remaining: Creative Tools (28) will be gradually migrated throughout July.
• Tool count: 86 → 89 (pomodoro-timer, timestamp-converter, quit-smoking-tracker).

• 560+ emojis covering all Unicode 15 categories: Smileys, People, Animals, Food, Travel, Activities, Objects, and Symbols.
• Bilingual search — type in English or Chinese to find any emoji instantly. Every emoji has both language tags.
• One-click copy — click any emoji to copy it to clipboard immediately.
• Skin tone picker — people emojis show a 6-variant tone selector on click.
• Recently used — last 20 copied emojis appear at the top (localStorage, no account needed).
• 8 category tabs — browse by Smileys, People, Animals, Food, Travel, Activities, Objects, or Symbols.
• 100% browser-based, no signup, works offline after first load.

• Native Windows client: built on Tauri 2.x with a Rust backend — not Electron, not a browser wrapper. Real file-system access, real performance.
• 9 tool categories covering PDF, Image, Audio, Video, Text, Calculator, Creative and AI — 50+ tools at launch, all running locally.
• PDF engine: merge, split, compress, rotate, encrypt/decrypt, extract pages, add watermarks and convert to images — powered by pdf-lib-plus-encrypt in Rust, zero uploads.
• Image engine: format conversion (JPG/PNG/WEBP/BMP/GIF/TIFF), batch compression, watermark removal, crop and collage — backed by the Rust image crate.
• FFmpeg integration: audio/video format conversion, compression, clipping, BPM detection, screenshot extraction and channel processing. FFmpeg is downloaded on first use (~40 MB) so the base installer stays lean at 11.6 MB.
• AI toolbox: translation, polishing, document generation and role-play via DeepSeek, OpenAI, Qwen and Moonshot APIs — the only module that requires an internet connection.
• Custom installer: a Tauri-built wizard that lets users choose language (Chinese / English), installation path, and automatically creates desktop shortcuts. The installer downloads the main program (46 MB) from dual CDN sources: Cloudflare R2 for international users, RainS3 for China.
• Auto-update system: checks manifest.json on startup, supports forced updates and graceful fallback between R2 and RainS3 sources.
• Complete bilingual i18n: nested JSON key structure covering every UI string, tool label, button and error message. Language is detected from the installer’s NSIS language ID and can be switched at runtime.
• WebGL dynamic backgrounds: six custom shader programs (DarkVeil, LightRays, Plasma, Ferrofluid, Dither, PlasmaWave) rendered on the home screen with randomised hue shifts for a unique visual experience every launch.
• Spider mascot: ToolKnit’s signature loading and transition animation, drawn at 1 AM and kept because sometimes the imperfect things are the ones that stick.
• Drag-and-drop + batch processing: drop hundreds of files into the window and process them in one click. Output directory is remembered across sessions.
• System tray integration: minimise to tray, restore from tray, quit cleanly — tray menu text switches with the active language.

• Frontend: plain HTML/CSS/JS reused from the web version, bundled with Vite, styled with Tailwind and custom shaders.
• IPC bridge: Tauri invoke() commands for frontend-to-Rust calls, Event listeners for real-time progress push from backend to UI.
• Rust backend: PDF manipulation, image processing, file-system operations, auto-update checks and AI API proxying.
• Native window: custom frameless title bar with minimise, maximise, close and always-on-top controls. Fixed 1100×800 resolution.
• Dual-source deployment: R2 (global) + RainS3 (China cn-nb1) with language-aware routing and cache-busting timestamps.

• The website (toolknit.com) continues to operate exactly as before — no features removed, no redirects, no paywalls.
• The desktop app is an addition, not a replacement. Use the web for quick, shareable, cross-platform tasks. Use the desktop for heavy batch processing, offline work and files you never want to leave your machine.
• Download page live at toolknit.com/exe.html with automatic source detection based on browser language.

• Bilingual migration: Hash Generator, Text Diff, Markdown Editor, JSON Formatter, Invoice Generator, Fancy Text Generator, and all tools across the PDF, Image, Video, Audio, and Text suites are now on the new bilingual architecture with language toggle, breadcrumbs, FAQ, and shared footer.
• bilingual.js v8: added bc.hashGenerator breadcrumb key; all migrated pages now reference bilingual.js?v=8.
• Service Worker: toolknit-v151 → toolknit-v152 with updated precache URLs.

• New tool: Text Animation Maker — type up to 50 characters and choose from 6 animated effects: Shimmer, 3D Flip, Blur Focus, Typewriter, Fade Slide Up, and Marquee. Live preview inside a redesigned slide-out drawer with a frosted-glass overlay, centered title, and a crisp white close button.
• Built-in color presets: each effect now ships with 4 ready-made color combinations. Users tap a preset swatch to update the background and text colors instantly; custom color pickers have been removed.
• True MP4 export: replaced the browser MediaRecorder WebM output with native WebCodecs H.264 encoding via mp4-muxer. The result is a real .mp4 file that plays natively on iPhones, Instagram, TikTok, and other platforms that reject WebM. Legacy browsers fall back to WebM automatically.
• Export progress fix: the progress bar no longer exceeds 100%; progress is clamped to 0–100% regardless of timing variance.
• GIF export removed: all GIF export code, references, and the gif-encoder.js dependency have been cleaned up from the tool page, service worker, and search metadata.
• Service Worker cache: toolknit-v143 → toolknit-v144; text-animation-maker.js v15 → v16.

• Native Windows desktop app is officially in development: We are building a real offline-first .exe client for Windows. The current tech stack is Tauri 2 + Rust on the backend, Vanilla JS for the UI, PDF processing via lopdf (split/merge) and pdfium (render to images), a custom WebGL2 animated background, Dropzone.js for drag-and-drop, and full i18n support. Packaging will be delivered as an NSIS installer.
• PDF suite Demo 0.1 is complete: The desktop PDF engine already supports PDF to Image, PDF Split, PDF Merge, and PDF Compress. That means roughly half of the full PDF suite is already running locally. This is a DEMO 0.1 build; we will move toward a closed Beta 1.0 release before opening it up more widely. Stay tuned.
• Web migration milestone: The new bilingual architecture migration is now complete for the entire PDF, Image, Video, and Audio tool categories. Every tool in those four categories has the new EN / 中文 language toggle, accordion FAQ, responsive footer-grid, and full dynamic UI translation. The remaining tools will be migrated progressively without breaking existing functionality.
• Call for bug reports: If you notice anything broken while using the newly migrated tools, please reach out as soon as possible so we can fix it fast. Quality is the priority.
• Growth update: ToolKnit has now crossed 3,000+ total uses and SEO exposure on both platforms has broken 10,000+ impressions. From the March 18 launch to today, it has been a real ride — thank you for being part of it.

• Typing Test SEO refresh: Typing Speed Test now targets the "three minute test" and "is 64 WPM good" keyword clusters. Added 3-minute and 5-minute test durations alongside the existing 15s, 30s, and 60s modes, expanded the FAQ JSON-LD with dedicated questions around 64 WPM and 3-minute pacing, and updated title, description, OG/Twitter tags, and on-page copy to match the new keyword strategy.
• Typing Test horizontal scrolling: Long-duration tests now render on a single horizontally scrollable line. The current character stays anchored 20% from the left edge as you type, and Backspace scrolls back in the other direction. Added 40% trailing padding so the final words never get stuck at the right edge of the viewport.
• WebP to PNG SEO refresh: WebP to PNG Converter received a full meta-refresh — title, description, keywords, OG/Twitter tags, SoftwareApplication JSON-LD, and H1/i18n copy — to sharpen its ranking for "webp to png" and related conversion terms.
• Two new blog guides: Published Normal Reaction Time — How Fast Can a Human React? (targeting "normal reaction time" and "average human reaction time") and How Many Paragraphs Is 2000 Characters? — Quick Guide (targeting "2000 characters is how many paragraphs" and related long-tail queries). Both articles include structured data, FAQ sections, and CTAs back to the relevant tools.
• Sitemap and index updates: Added the two new blog URLs to sitemap.xml with today’s lastmod, updated lastmod dates for typing-test.html and webp-to-png.html, refreshed the blog list on blog/index.html with new category entries and counts, and updated the homepage article stats (141 total resources, 86 blog guides).

• Animated text generator with MP4 export: A brand new tool that turns any text into kinetic typography animations and exports them as MP4 video files directly in your browser. Perfect for social posts, intros, thumbnails, and short-form content. Watch for it tomorrow.

• Silk Screen bilingual migration complete: Silk Screen Filter fully migrated to the new bilingual architecture. Hero top-bar with EN / 中文 language toggle and hamburger menu, breadcrumb navigation, How It Works (3-column cards), Why Use, Pro Tips, FAQ accordion with FAQPage JSON-LD, responsive footer-grid, and full EN / 中文 i18n for all static and dynamic UI strings (drop zone, LPI slider, dot size, channel colors/angles, paper color, channel toggle buttons, export/reset buttons).
• Image tools category fully migrated: Every image tool is now on the new bilingual architecture. The last two holdouts — Circle Crop and Silk Screen — are complete. All three major tool categories (PDF, AI, and Image) are now bilingual.
• Silk Screen structured data: Added complete SoftwareApplication JSON-LD with url, image, browserRequirements, inLanguage, datePublished, dateModified, publisher, and featureList, plus BreadcrumbList and FAQPage JSON-LD (6 questions, matching visible FAQ exactly).
• Changelog fix: Corrected the Jun 16 entry that incorrectly linked to tools/ai-personality.html (non-existent page). The 4th AI tool is AI Text Adventure, not AI Personality.
• Video tools category fully migrated: All video tools are now on the new bilingual architecture. Video Screenshot and Video to Audio fully migrated with EN / 中文 language toggle, accordion FAQ, footer-grid, and full dynamic string translation. The entire video-tools suite is now bilingual.
• Metronome bilingual migration complete: Online Metronome fully migrated to the new bilingual architecture. Replaced Phosphor icons with inline SVG, added EN / 中文 language toggle, accordion FAQ with FAQPage JSON-LD, responsive footer-grid, and full dynamic string translation for all UI elements (BPM display, tap tempo, play/stop buttons, beat accent labels).
• WAV to MP3 bilingual migration complete: WAV to MP3 Converter fully migrated to the new bilingual architecture. Replaced Phosphor icons with inline SVG, added EN / 中文 language toggle, accordion FAQ with FAQPage JSON-LD, responsive footer-grid, and full dynamic string translation for all UI elements (drop zone, bitrate selector, convert/download buttons, progress labels, error messages, info cards).
• Audio tools migration continues: Two major audio tools — Metronome and WAV to MP3 — are now bilingual. Remaining audio tools will be migrated next.

• All 4 AI tools bilingual migration complete: AI Tarot, AI Text Adventure, Ex AI Chat, and AI Trajectory all fully migrated to the new bilingual architecture. Every tool now has EN / 中文 language toggle, hamburger menu, accordion FAQ, footer-grid, and full dynamic string translation via t().
• AI Trajectory bilingual migration: AI Trajectory Predictor migrated — hero top-bar, breadcrumb, all static sections, and every dynamic UI string (round labels, trajectory cards, likelihood badges, epilogue, API key states, error messages). Fixed a critical bug where node.round was undefined in the timeline by passing the pushed object instead of the raw AI data. Added tLike() and tRound() helpers for proper Chinese likelihood and round number formatting.
• AI Trajectory Chinese output: In Chinese mode, the DeepSeek system prompt, first-round message, and every subsequent round message are now sent in Chinese — AI responses are fully Chinese rather than English regardless of the user’s input language.
• AI Tarot bilingual migration complete: AI Tarot Reading fully migrated — spread labels, position labels, modal text, error states all bilingual.
• New structured data: Enhanced SoftwareApplication JSON-LD across all AI tools with url, image, browserRequirements, inLanguage, datePublished, dateModified, publisher, and featureList.
• Image tools migration (afternoon): PDF suite and AI tools are done — image tools are next. Once complete, all three major categories will be fully migrated to the bilingual architecture.
• Image tools migration wrap-up: Every image tool except Circle Crop and Silk Screen is now fully migrated to the bilingual architecture. These two are the last holdouts in the image category; they’ll be tackled tomorrow, immediately followed by the entire video-tools suite.
• Desktop app announced: Development on the native Windows EXE client officially kicked off today. The goal is a full offline desktop experience with faster rendering and local file handling. Target release window: within the next year. Something to look forward to.
• Migration continues: Remaining tool categories will be migrated progressively. Feature releases remain on schedule; architecture quality is the priority this sprint.

• Library Manager launched: New standalone page Library Manager lets users pre-download all heavy AI libraries (Tesseract.js OCR, background-removal model, face-api, etc.) into IndexedDB in one click — tools that depend on these libraries load instantly on subsequent visits, even offline. Bilingual (EN / 中文), tracks per-library install status, and links back to affected tools.
• Background Remover bilingual migration complete: Background Remover rebuilt on the new bilingual template — hero top-bar with EN / 中文 language toggle, hamburger menu, accordion FAQ with FAQPage JSON-LD, responsive footer-grid, and full EN / 中文 i18n for all static and dynamic UI strings.
• AI Ex-Partner Chat bilingual migration complete: AI Ex-Partner Chat fully migrated — hero top-bar, accordion FAQ, footer-grid, and full EN / 中文 i18n across all static sections and every dynamic UI string in the tool area.
• Complete UI translation for AI Ex-Partner Chat: "Create Your Persona", "Their Name", "Your Avatar", "Screenshot Type", "Upload Chat Records", "Distill Persona", "Check Sender Labels", "Swap All", "Looks Correct", "Memory, not the person", chat input placeholder, Export and Send buttons all bilingual.
• Distillation progress fully translated: All 15 rotating status messages, all 6 step indicators (Step 0/7 – 5/7), the completion status, and the post-distill system message switch correctly between EN and ZH.
• Footer rebuilt to standard: Replaced custom icon-button footer with the standard footer-grid layout — Popular Tools (7 entries), Categories (footer.c1–c7), and Support & Legal. Footer link hover effects restored.
• Textarea placeholder & loadChatUI fix: applyI18n() now handles TEXTAREA placeholder; applyI18n() called inside loadChatUI() so chat-state elements re-translate on language switch mid-session.

• Image tools bilingual migration complete: All 11 image tools rebuilt on the new bilingual architecture — Image to PDF, Compress Image, JPG to PNG, PNG to JPG, JPG to WebP, PNG to WebP, WebP to JPG, WebP to PNG, Image Grid Split, Image Crop, Image Resizer. Each page now features a hero top-bar with language toggle, accordion FAQ with FAQPage JSON-LD, responsive footer-grid, and full EN/中文 i18n.
• Fixed camera & microphone access denied: The Microphone & Camera Test tool was failing on every device with Permissions policy violation — not because users blocked it, but because the Nginx server was sending a restrictive Permissions-Policy header (camera=(), microphone=()), which silently forbade all access. Updated to camera=(self), microphone=(self) — users now see the normal browser permission prompt.
• Smarter error messages: Updated the deny-state copy in mic-camera-test.js (both EN & ZH) to explain that multi-device failures usually point to a server header issue, not a browser settings issue.
• Cache bump: Service Worker updated to toolknit-v119; mic-camera-test.js bumped to ?v=2.
• Legacy pages remaining: 67 tools still on the old architecture. Gradual migration to the new bilingual template continues.

• New page architecture rolled out: The entire PDF suite — Merge PDF, Compress PDF, PDF to Word, Word to PDF, PDF to Image — plus Spin the Dare have been rebuilt on a new, SEO-first bilingual architecture.
• What the new architecture includes: cross-page language memory (your EN/中文 preference now persists across the whole site via localStorage), a hero top-bar with hamburger navigation, a full FAQ accordion backed by FAQPage JSON-LD, enhanced SoftwareApplication structured data, a responsive footer-grid layout, and mobile polish (viewport-fit=cover, dark theme-color).
• Spin the Dare reborn: Replaced the old canvas roulette wheel with a slot-machine-style text reveal animation — the dare scrambles through random prompts fast, then eases to a dramatic stop with sound and scale cues. Smoother, punchier, and far better than the spinning wheel.
• New tool — Morse Code Translator: two-way text↔Morse with audio beep playback (adjustable WPM), screen-flash signaling, and the full international Morse alphabet. The first tool built entirely on the new blueprint.
• New tool — Microphone & Camera Test: check your mic and webcam live — volume meter, webcam preview, device picker; nothing recorded (getUserMedia, 100% private).
• Future-proofing: Every new feature and page from here on ships on this architecture by default. Bilingual support and SEO are no longer afterthoughts — they are the baseline.
• Gradual legacy migration: The remaining ~77 legacy tool pages will move to the new architecture gradually over the coming weeks and months. This will be slow — AI token costs are heavy — so thanks for your patience. Building these few pages alone cost over $100 in tokens.
• Tool count: 84 → 86 (Morse Code Translator + Mic & Camera Test added). Text Tools 9 → 10, Creative Tools 25 → 26.
• Service Worker cache: toolknit-v97 → toolknit-v115.

• New tool: Lyric Visualizer — Upload audio (MP3/WAV) + LRC lyrics file for a full-screen immersive music player with real-time audio waveform visualization, time-synced fading lyrics, draggable progress bar, automatic ID3 cover art extraction, and dark/light theme toggle. 100% browser-based, Web Audio API + Canvas. Full bilingual (EN/中文) support with inline i18n.
• Live Photo Frame removed. After two days of intensive debugging (rounded corners distortion, HEVC video black screen, ffmpeg.wasm MP4 transcoding freeze, Android Motion Photo detection failures), the tool still couldn't deliver a polished user experience. The core problems: (1) Canvas quadraticCurveTo produces parabolic arcs that look like chamfered corners at large radii; (2) HEVC/H.265 videos from Android Motion Photos can't play natively in Chrome, and ffmpeg.wasm transcoding at 1080×1920 is too slow in-browser; (3) WeChat and other messaging apps strip embedded video data from Motion Photos, making the primary use case unreliable.
• Tool count: 84 → 83 → 84 (Live Photo Frame removed, Lyric Visualizer added)
• Audio Tools category: 5 → 6
• Image Tools category: 18 → 17
• Homepage i18n complete: All homepage sections now fully translatable to Chinese — category filters (AI, Self-Test), How It Works, CTA section, and footer. Added generic data-i18n / data-i18n-html attribute handlers with dot-notation key resolver in i18n.js. CTA tool buttons now load dynamically from tools.json (random 5 picks) instead of hardcoded links. Footer Popular Tools and Category links also translatable.
• Service Worker cache: toolknit-v92 → toolknit-v97

• New tool: Spin the Dare — 300 drinking game dares in 6 categories, canvas roulette wheel with spin animation, confetti celebration, and full bilingual (EN/中文) support.
• New tool (beta): Live Photo Frame (later removed — see Jun 11) — Frame iPhone Live Photos (HEIC+MOV) and Android Motion Photos in elegant 9:16 or 16:9 layouts with black or white backgrounds and large rounded corners. Currently at ~60% completion — basic framing and export work, but the ffmpeg.wasm video engine modal and some edge cases need more polish. Full optimization begins Jun 11.
• Auto-detection: Automatically detects iPhone Live Photo pairs (HEIC+MOV), Android Motion Photos (JPG with embedded MP4), and standalone video files.
• Video engine: Uses ffmpeg.wasm (single-thread, ~32 MB one-time download) for H.265 MOV transcoding and MP4 encoding. Downloads only when needed, cached by browser.
• HEIC support: Uses heic2any for client-side HEIC-to-JPEG conversion.
• Bilingual UI module: New bilingual.js shared translation module for nav, footer, breadcrumb, related tools, feature pills, and modal content (Contact Us, Developer's Story). Zero impact on existing pages — only loaded on bilingual tool pages.
• Wheel colors: Increased segment saturation and fill opacity for better visual appeal.
• Phosphor icons: Replaced emoji with Phosphor icons across category pills, how-it-works, and hero sections.
• AI Pixel Art GIF removed (second time): First attempt (Jun 9) used DeepSeek to generate pixel art — quality insufficient. Second attempt replaced DeepSeek Vision with local canvas pixel analysis + gif.js encoding, but the output still fell short of production quality. Three bugs were fixed before removal: Worker CORS (local gif.worker.js), Canvas willReadFrequently warning, DeepSeek API 400 error (replaced with local analysis). All solid fixes, but the tool itself didn't survive.
• Tool count: 82 → 83 → 84 (Spin the Dare added, AI Pixel Art GIF removed, Live Photo Frame added)
• Creative Tools category: 24 → 25
• Image Tools category: 17 → 18
• AI Tools category: 5 → 4
• Service Worker cache: toolknit-v88 → toolknit-v92

• AI Life Trajectory Predictor — Describe your profile in detail (age, career, goals, constraints), and AI predicts 3-5 possible future trajectories per round. Choose the path that resonates, and AI recursively infers the next stage. 1-10 rounds of multi-round inference, each with likelihood ratings (High/Medium/Low) and time spans. Final round delivers an epilogue 10+ years out. Keyboard shortcuts A-E for quick selection. DeepSeek API key held in memory only — never saved, cleared on refresh.
• Silk Screen Filter — Turn any photo into a tri-color halftone silk screen print. Red, blue and grey channels with adjustable dot density (LPI 15-120), screen angles (default 15°/75°/45°), custom colors and paper background. View each channel separately or composite. Multiply blending on warm newsprint. Export PNG. 100% browser-based, no uploads.
• AI Pixel Art GIF removed — LLM-based pixel art generation quality insufficient for production; archived.
• MIDI Keyboard sustain pedal behavior corrected:
  • Sustained notes now decay naturally (~2s) instead of hanging forever at ADSR sustain level.
  • Releasing pedal applies 150ms quick fade-out instead of hard-cutting all sustained notes.
• Tool count: 80 → 82
• Image Tools category: 16 → 17
• AI Tools category: 3 → 4
• Service Worker cache: toolknit-v86 → toolknit-v88
• Blog guides published: AI Life Trajectory Predictor, Silk Screen Filter
• Content library: 133 → 139 articles (Blog 82→84, Changelog 42→46)

• AI Text Adventure — Free AI-powered interactive text adventure game. Describe any story concept, AI generates the world, narrative, and 3 choices per turn. Pixel-style beep-beep-beep sound effects during dialogue streaming. Keyboard shortcuts A/B/C. API key validated upfront — invalid keys are rejected immediately with a clear error modal.
• Dynamic RPG systems:
  • Gold system: Earn gold through exploration, combat, and events. AI awards/deducts gold via [GOLD+X] / [GOLD-X] markers. Coin-clink sound effect on every gold change.
  • AI-generated random events: No more fixed event lists. AI creates context-aware unexpected events (discoveries, dangers, encounters, twists) that fit naturally into the current story. Events can also unlock shop items.
  • Progressive shop system: 8 items unlock gradually as the story advances — Soul Compass (turn 2), Health Potion (4), Lucky Charm (7), Spirit Lantern (10), Skeleton Key (15), Ancient Map (20), Ward Shield (30), Phoenix Feather (40). AI can also unlock items early via [UNLOCK:item_id] when the story naturally introduces them (e.g. finding a lantern in a cave). Locked items show as mystery ??? 🔒 slots in the shop.
  • Inventory: Purchased items appear in a backpack modal. AI incorporates owned items into the narrative as real objects.
• Architecture overhaul:
  • Context window trimmer: Sliding window keeps system prompt + last 40 messages. Prevents API timeout/overcost on 100-turn games.
  • Hard turn cap: Game forces end at maxTurns + 8 — random events and shop purchases can no longer inflate turn count beyond 8 extra turns.
  • BuyItem no longer calls generateTurn(): Purchases record to conversation history; AI responds naturally on the next normal turn. Saves API quota and prevents turn inflation.
  • API error handling: Specific messages for 402 (insufficient balance), 429 (rate limit), 401/403 (invalid key).
  • max_tokens 600 → 800: More room for narrative + 3 options + gold/unlock markers without truncation.
  • Export cleanup: TXT export strips [GOLD] and [UNLOCK] markers, includes gold total and item list.
• Adventure length options: Fast (20 turns), Medium (50 turns, default), Slow (100 turns).
• 3 new achievements: Gold Hoarder (50+ gold), Collector (3+ items), Reborn (purchased Phoenix Feather).
• API Key Validation for all AI tools: AI Tarot and AI Ex-Partner Chat now validate your DeepSeek API key before letting you proceed. Invalid keys (401/403 errors) trigger a modal explaining the error and linking to platform.deepseek.com/api_keys. No more wasted sessions ending in cryptic error messages.
• New "AI Tools" category: Moved AI Tarot (from Creative) and AI Ex-Partner Chat (from Self-Test) into a dedicated AI Tools category. 10 categories total. All counts updated across the site.
• Hardcoded count audit: Fixed stale article count (129 → 132), blog guides (79 → 81), changelog entries (41 → 42), categories (9 → 10), tool count (78 → 80) across index.html, status.html, 404.html, manifest.json, llms.txt, and blog/what-is-toolknit page.
• MIDI Keyboard timbre overhaul: 4 → 8 instruments. Added Pipa (琵琶), Guitar (吉他), Flute (笛子), and Music Box (音乐盒). Each new timbre uses advanced Web Audio synthesis for distinctive sound:
  • Pipa — Sawtooth + square with non-integer harmonics (5.04x, 7.01x) for metallic twang, high-Q resonant lowpass filter, and pluck noise burst for realistic finger-pick attack.
  • Guitar — Triangle + 6 harmonics with body resonance (105 Hz & 215 Hz bandpass filters simulating acoustic cavity), subtle pluck noise, warm mid-range decay.
  • Flute — Pure sine with faint 2nd harmonic, vibrato LFO (5.5 Hz, 8 cents depth, delayed onset at 0.3s), and breath noise (highpass-filtered white noise at 3 kHz) for airy texture.
  • Music Box — Non-integer bell partials (2.756x, 5.404x, 8.933x) for metallic chime, octave-above overtone, highpass filter at 400 Hz to remove low rumble, long natural decay.
• Audio engine upgrade: Extended midi-audio-engine.js with 5 new synthesis features — pluck noise bursts, vibrato LFO with delayed onset, breath noise layer, body resonance bandpass filters, and highpass filtering. All 4 new timbres sound distinctly different from each other and from the original 4.
• GitHub repo major overhaul:
  • README.md rewritten — 76 tools, shields.io badges, full tool catalog table (11 categories), privacy verification table, tech stack, repo structure, contributing guide.
  • Added MIT LICENSE file.
  • Added CONTRIBUTING.md with standalone demo submission, documentation, and translation guidelines.
  • Repository description & 16 topics updated (browser-tools, pdf-tools, image-tools, video-tools, audio-tools, privacy, client-side, webassembly, web-audio, no-upload, free-tools, online-tools, productivity, text-tools, calculator, pwa).
  • Enabled GitHub Discussions; disabled empty Wiki.
• Awesome List PRs submitted:
  • pluja/awesome-privacy — ToolKnit listed under Utilities section.
  • notthetup/awesome-webaudio — MIDI Keyboard listed under Apps section.
• AI Tarot page UI overhaul: Rebuilt the entire page to match the ToolKnit tool template standard (aligned with ex-ai-chat.html). Fixed: custom nav replaced with standard back button + breadcrumb, emoji icon replaced with Phosphor icon, purple accent colors normalized to neutral white, added FAQ section with JSON-LD, Pro Tips wrapped in card container, footer upgraded to full 4-column layout with social links, added <main> wrapper and ahrefs analytics.
• AI Tarot card images: Replaced CSS/emoji card faces with real Rider-Waite Smith illustrations (Public Domain). 79 WebP images uploaded to assets/img/tarot/ — 22 Major Arcana + 56 Minor Arcana + card back. Cards now display authentic artwork with a semi-transparent label overlay (English name + Chinese). Card size upgraded from 120×200 to 140×246. All remaining emojis (Draw button, AI Interpretation heading) replaced with Phosphor icons.
• Pro Tips compliance: Split long tip sentences into separate <li> items per toolknitSkill.md rules. Each bullet ≤1 line, highlights use <span class="text-white/55"> at sentence start, no <strong>.
• MIDI Keyboard Quick Play Songs: Added a left-side floating song sheet panel (desktop only, ≥1280px). 6 famous pieces — Für Elise, Summer (Kikujiro), Ode to Joy, Canon in D, Castle in the Sky, Always With Me (Spirited Away). Click a song to see the keyboard key sequence (e.g. E D# E D# E B D C A); follow the keys to play the melody yourself. Auto-shifts the keyboard to the correct octave for each piece.
• New blog posts: AI Tarot —Free Online Card Reading with DeepSeek Interpretation and MIDI Keyboard —8 Synth Timbres, Quick Play Songs & .mid Export.
• Service Worker cache: toolknit-v78 → toolknit-v84

• Meeting Cost Calculator — Watch your meeting burn money in real time. Enter attendees and salary, hit Start, and a counter ticks up every second. Multi-currency (¥/$/€/£/₹), salary presets (Intern to C-Suite), one-click share. Nothing shortens a meeting like watching it burn cash.
• MIDI Keyboard — Play piano in your browser with computer keyboard or mouse. 4 synth timbres (Grand Piano, Electric Organ, Synth Lead, String Ensemble), sustain pedal, octave shift, record your performance, and export a standard .mid file you can open in any DAW. Web MIDI output sends notes to external devices in real time (Chrome/Edge). Neumorphic piano design for immersive feel.
• New blog post explaining the math, features, and why this tool exists.
• New dev blog: Building AI Ex-Partner Chat: OCR, Sender Detection & the 3 AM Code That Shouldn’t Exist — Technical deep dive into Tesseract.js bounding box sender detection, position-based identification, garbage filtering, OCR pre-processing pipeline, shared worker optimization, persona distillation architecture, identity guard rules, and the hardest bug that wasn’t in the code.
• Duplicate FAQPage fix: Color Picker had two FAQPage JSON-LD blocks causing GSC “Duplicate field” error. Merged into single FAQPage with 8 questions.
• Broken internal links: Fixed 3 broken links in changelog.html pointing to ../tools/ (should be tools/ since changelog is in root).
• Service Worker cache: toolknit-v76 → toolknit-v78
• MIDI Keyboard polish: Fixed echo bug (hard-stop old note on re-trigger instead of slow release). Removed R/P shortcut conflict with piano keys. Sustain pedal changed to toggle (click/Space). Responsive keyboard width adapts to screen size. Global mouseup prevents stuck notes. Multi-touch slide support for mobile. Playback now sends to external MIDI devices. Ctrl+S no longer triggers C# key.

• New tool: AI Ex-Partner Chat — Distill your ex-partner's personality from chat records into an AI persona you can talk to. Supports WeChat, QQ, WhatsApp, Telegram, Douyin screenshots (OCR). 6-step distillation with animated progress. Consent overlay with 5-second countdown. Persona naming and avatar upload. Correction feature for out-of-character responses. /let-go command to permanently delete all data. Uses your own DeepSeek API key — 100% browser-based, zero data upload.
• AI-powered sender identification: Screenshot OCR no longer relies on unreliable pixel-based avatar/bubble detection. Instead, the entire image is OCR'd first, then DeepSeek identifies who said each message based on conversation context, tone, and flow — outputting [对方] and [我] labels. This prevents mixing your messages with your ex's during persona distillation.
• Strict ex-only persona extraction: Every distillation step now receives both the full conversation (for context) and the ex-partner's messages only (for personality extraction). Hard rules in all prompts: personality traits MUST come from [对方] messages only — [我] messages are context-only and must never be attributed to the persona.
• Chat system prompt reinforcement: Added identity guard rule: “You are [name], NOT the user. Never mirror the user's speech patterns.” Prevents the AI from adopting the user's phrases and emotional expressions.
• Screenshot type selector: Added radio buttons for Douyin, WeChat, WhatsApp, QQ, and Auto Detect. Auto mode tries all four and picks the one with the most bubble matches.
• OCR image pre-processing: Message zones are now 2x upscaled, converted to grayscale, and contrast-stretched before OCR. Dramatically reduces Chinese character misrecognition.
• DeepSeek OCR correction + sender ID: New combined Step 1 sends raw OCR text to DeepSeek for simultaneous error correction and sender identification — fixes wrong/missing characters while labeling who said each message.
• Shared Tesseract worker: Replaced per-zone Tesseract.recognize() (which created a new WASM worker for every chat bubble) with a single reusable createWorker(). OCR processing time reduced from minutes to seconds.
• Fixed Tesseract is not defined: Extracted ensureTesseract() loader called at the start of both parseScreenshot() and ocrImage() — no more ReferenceError when Tesseract.js hasn't loaded yet.
• Skipped tiny zones: Zones under 20px height are now skipped (they produced “Image too small to scale” warnings and garbage OCR results).
• User avatar upload: Added “Your Avatar” section in setup — your avatar appears next to your messages in the chat UI.
• Export persona: Added Export button in chat header — downloads distilled persona data as a TXT file.
• Distillation steps: 5 → 6 (new Step 1: OCR correction + sender identification).
• Full tool audit: reviewed all 75 tools — every tool is confirmed working correctly.
• Pro Tips polish: split long tips into shorter, scannable bullet points across Metronome, BPM Detector, Noise Generator, Extract Text, JSON Formatter, Invoice Generator, Age Calculator, and BMI Calculator.
• Whiteboard: broke long “Why choose” description paragraphs into natural line breaks for better readability.
• JSON Formatter: fixed white-on-white dropdown menu — select and options now use dark background with light text.
• Changelog: added missing timeline links for Jun 3, Jun 2, and May 13; fixed corrupted date on the May 3–6 entry; updated stale FFmpeg reference in the Mar 20 entry.
• Self-Test category: 1 → 2 tools
• Tool count: 75 → 76
• Service Worker cache: toolknit-v71 → toolknit-v73
• Blog post: AI Ex-Partner Chat guide — usage walkthrough, OCR technical explanation, honest self-reflection on why this tool exists.
• Updated: index.html, tools.json, search.js, sitemap.xml, service-worker.js, public-stats.php, zh.json, i18n.js, llms.txt, manifest.json, 404.html, status.html, changelog.html, blog/stories.html, blog/what-is-toolknit-free-online-tools.html, blog/index.html, blog/ai-ex-partner-chat.html

• New tool: Emotional Neglect Test — 40-question psychological assessment based on attachment theory and emotional invalidation research. 5 dimensions (Emotional Responsiveness, Expression, Being Valued & Seen, Self-Regulation, Relational Patterns), Likert scale, radar chart, detailed profile classification. 100% browser-based and private.
• New category: Self-Test — dedicated section for psychological self-assessment tools.
• Tool count: 74 → 75
• Service Worker cache: toolknit-v70 → toolknit-v71
• Updated: index.html, tools.json, search.js, sitemap.xml, service-worker.js, public-stats.php, zh.json, i18n.js, llms.txt, manifest.json, 404.html, status.html

• compress-video: Complete architecture rewrite. Replaced FFmpeg.wasm (2s video → 100+s compression, 24MB engine download) with Canvas + MediaRecorder native compression. Real-time processing — video plays, compression finishes. 10-50x speedup. Zero dependencies (no WASM, no SharedArrayBuffer, no engine download). Removed COI Service Worker and 24MB FFmpeg vendor files from server.
• video-to-gif: Replaced frame-by-frame seeking (stuck at 50%, onseeked unreliable) with real-time playback capture. Video plays at normal speed, frames captured at fps intervals via requestAnimationFrame. Added Select All button for instant full-video selection.
• video-to-audio: Added dual-strategy audio extraction. Method 1: decodeAudioData (fast, WAV output). Method 2: real-time playback capture via AudioContext + MediaRecorder (handles MOV/WebM codecs that decodeAudioData can't decode). Fixed AudioContext autoplay policy error. Fixed DOM null reference on retry. Download format auto-adapts (WAV/WebM/M4A).
• pdf-to-word: OCR preprocessing pipeline upgrade — 7-step professional pipeline: Scale 3.0 render, white background fill, grayscale, Otsu adaptive binarization, Unsharp Mask sharpening, re-binarization, canvas memory cleanup. Always outputs text (marks low-confidence pages). CDN fallback for PDF.js/FileSaver. Runtime guards for missing libraries.
• compress-pdf: Scale/quality presets tuned down to prevent output larger than input. "Already optimized" message when compression increases size, with original file download option.
• heic-to-jpg: Pro Tips layout fix — titles and descriptions on separate lines, removed white-space:nowrap, improved spacing.
• image-grid-split: Fixed wrong JS reference (compress-pdf.js → image-grid-split.js) and removed unnecessary CDN dependencies.
• background-remover: Model caching pre-check with full-screen modal UX. localStorage flag prevents re-downloading 105MB AI model.
• coi-serviceworker: Fixed cross-origin fetch interception causing "Failed to construct Response" errors. Only intercepts same-origin requests now. (File later removed as compress-video no longer needs it.)
• Server cleanup: Deleted tools/vendor/ffmpeg/ (~24MB) and tools/coi-serviceworker.js from production.

Audited 25 tools across PDF (5), Image (16), and Video (4) categories. The remaining tools will be inspected in the coming days.

• Noise Generator — Free online noise generator with 7 sounds: white noise, brown noise, pink noise, rain, ocean waves, wind, and thunder. 7-channel mixer with independent volume sliders, one-click presets (Deep Focus, Sleep Aid, Calm, Reading, Storm), sleep timer with gentle fade-out (15/30/60/90 min), master volume control, and Space key shortcut. Noise channels use Web Audio API; nature sounds (rain, ocean, wind, thunder) use real MP3 audio for authentic quality.
• Hash Generator — Free online hash generator with MD5, SHA-1, SHA-256, SHA-512 from text or files. Drag-and-drop file hashing with progress bar. HMAC-SHA256/HMAC-SHA512 support. One-click hash comparison to verify file integrity. Uppercase/lowercase toggle. 100% browser-based via Web Crypto API —no uploads, no server.

• Tool count updated from 72 to 74 across all hardcoded references (index.html, 404.html, changelog.html, status.html, blog/stories.html, blog/what-is-toolknit-free-online-tools.html, blog/index.html, llms.txt, manifest.json).
• Audio Tools category count updated from 4 to 5. Text Tools category count updated from 8 to 9.
• Service worker cache bumped to toolknit-v70.
• Added Noise Generator and Hash Generator to tools.json, search.js, sitemap.xml, public-stats.php, zh.json, i18n.js cache version.
• Added 4 MP3 audio files (rain, ocean, wind, thunder) to service worker precache.

• Item Locator — Free home inventory and item locator. Record where you put things with photos, names, notes and locations. Camera capture on mobile, instant search across all fields, export/import as JSON. 100% private — all data stored in browser localStorage.
• ASCII Art Generator — Convert any image to ASCII art text. Adjustable width (30–200 cols), 4 character sets (Standard, Detailed, Blocks, Simple), contrast slider, invert toggle, dark/light background. Download as TXT or copy to clipboard. 100% browser-based.
• ASCII Text Banner — Create big ASCII text banners from any word or phrase. 20 FIGlet fonts (Standard, Slant, Shadow, Block, Star Wars, Graffiti, and more), dark/light background, adjustable max width. Download as TXT or copy to clipboard. 100% browser-based.

• Item Locator: Search changed from real-time to explicit trigger (search button + clear button + Enter key), matching homepage pattern.
• Item Locator: Search overlay loading animation with spinner and auto-scroll to results on search trigger.
• Item Locator: Export/Import buttons changed to icon-only, kept on one row for mobile.
• Item Locator: Replaced modal detail view with full-page detail view showing title, location, notes, photo, and hamburger menu for Edit/Delete.
• Item Locator: Modal action buttons restyled with .modal-actions class for mobile-friendly layout.

• Item Locator blog post rewritten with 200+ long-tail keywords covering everyday items (keys, glasses, remote), tiny items (ear picks, nail clippers), important documents (passport, birth certificate), car parking, moving boxes, seasonal storage, tools, medicine, electronics, kitchen, sports, and sentimental items.
• FAQ schema expanded from 4 to 10 questions targeting high-volume search queries.

• Tool count updated from 69 to 72 across all pages.
• Item Locator added to: homepage card, search index, tools.json, sitemap, service worker precache (v66), Chinese translation (v36), blog post, blog index.
• ASCII tools added to: homepage cards, search index, tools.json, sitemap, service worker precache (v67), Chinese translation (v37), manifest.json, blog posts, blog index.
• Blog footer audit: video-screenshot.html footer upgraded from copyright-only to full 4-column layout. All 82 blog pages now have complete footers.

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• BPM Detector — Upload any audio file (MP3, WAV, OGG, FLAC, M4A) and detect its tempo instantly in the browser. Features waveform visualization with beat markers, tap tempo verification, audio playback with seekable progress bar, and complete file info. Powered by the Joe Sullivan / BeatDetect.js algorithm with OfflineAudioContext and bandpass filtering. 100% private — no server upload.
• Circle Crop — Crop any image into a perfect circle with transparent background. Drag to reposition, slider to resize, one-click download as lossless PNG. Supports JPG, PNG, WebP, BMP, GIF.
• Video Screenshot — Step frame-by-frame through any video and capture lossless HD screenshots. Features timeline scrubbing, play/pause, previous/next frame navigation (auto-detects frame rate), and export as PNG, JPEG, or WebP at the video’s native resolution. Keyboard shortcuts: Space (play/pause), arrow keys (step frames), Ctrl+S (capture). Supports MP4, WebM, MOV.

• Related Tools dynamic loading — Replaced inline var tools=[...] arrays in all 70 tool pages with a single assets/data/tools.json + assets/js/related-tools.js. Adding a new tool now requires updating one JSON file instead of 70 HTML files.
• Changelog modal → direct link — Footer Changelog icon now navigates to changelog.html instead of opening an outdated hardcoded modal.
• Holidays search UX — Replaced real-time filtering with button/Enter-triggered search, added search overlay animation, custom clear icon, and auto-scroll to results.

• Tool count updated from 66 to 69 across all pages: index.html, manifest.json, 404.html, status.html, changelog.html, blog/stories.html, blog/what-is-toolknit-free-online-tools.html, blog/index.html, llms.txt.
• Video Screenshot added to: homepage card, search index, tools.json, sitemap, service worker precache, public-stats.php, Chinese translation, blog post, blog index, and the “What Is ToolKnit” overview page.
• Service worker cache bumped to v65; zh.json cache bumped to v35.
• Fixed tool count mismatches (66/67/68 → 69) found in status.html, changelog.html, blog/stories.html, blog/what-is-toolknit-free-online-tools.html, llms.txt, and index.html JSON-LD.

• Deployment file overwrite — Fixed critical SCP deployment error where blog/index.html overwrote root index.html and blog/video-screenshot.html overwrote tools/video-screenshot.html. Root cause: multi-file SCP to same directory with identical filenames. Now deploying files one-by-one with full target paths.
• Tool page template compliance — Video Screenshot page was missing standard modules (How it works, Why use, Pro Tips, Related Tools header, full footer, auth/main/footer-modals/sound-effects scripts). All sections now match the circle-crop.html template.
• Pro Tips line-break issue — Replaced <strong> tags with <span style="color:rgba(255,255,255,.55);font-weight:600"> to prevent unnatural line breaks in tip lists.

• CSV Chart Maker — Paste CSV or spreadsheet data and turn it into bar, line, area, pie, doughnut, radar, or scatter charts directly in the browser.
• Chart export workflow — Download clean PNG charts, copy chart images where supported, save JSON configs, or export a standalone interactive HTML preview that keeps the chart data embedded locally.
• Chart customization — Tune titles, subtitles, axis labels, legends, grid visibility, stacked bars, scatter mappings, radar shapes, colors, and sample datasets without sending anything to a server.
• Long-tail SEO tuned — The page now targets more specific phrases such as CSV chart maker, CSV to chart online, spreadsheet chart maker, and interactive HTML chart export instead of only chasing broad, highly competitive chart keywords.

• Pixel Art Converter upgraded — Added more creative presets beyond the original retro console set: PICO-8, DB16, Sprite, Portrait, and Neon.
• Better preset behavior — Each preset now carries its own resolution, palette or color count, saturation, contrast, detail boost, dithering, outline, and outline-strength settings for more useful one-click results.
• More control after presets — Added visible controls for dithering, outline, grid, saturation, contrast, detail boost, and outline strength so users can keep a preset style but still fine-tune the result.
• Preview and export polish — The converter keeps crisp pixel rendering, includes a palette preview, supports holding to compare the original image, and offers both normal PNG and HD 4x downloads.

• Standalone HTML syntax fixed — Resolved an exported-file JavaScript issue where a doughnut label formatter could generate an invalid newline token in the saved HTML preview.
• Local preview noise reduced — Chart Maker now avoids loading manifest and analytics scripts in file:// or localhost preview contexts, reducing irrelevant browser-console errors while testing locally.
• Browser translation interference reduced — Added notranslate metadata to the tool page and exported HTML previews to avoid unnecessary translation-layer warnings on local files.

• Mobile layout improved — The preview panel now appears before controls on small screens, axis and scatter controls stack cleanly, summary cards tighten up, and chart height adapts better on mobile.
• Global references updated — Homepage, search, sitemap, service worker, status metadata, public stats labels, manifest, release docs, and site overview pages now include Chart Maker as the 66th functional page.
• Homepage discovery improved — Chart Maker was added to the Creative category, homepage CTA area, Chinese homepage translations, site search keywords, and the ToolKnit overview article.
• Service worker cache bumped to v60

• Batch 1 tool page issues fixed — Repaired broken footer closures, restored the hidden Features block on aim-trainer.html, fixed the reaction history chart on reaction-time-test.html, stacked its method cards vertically, and strengthened the active tab highlight on what-to-eat.html.
• Legacy Related Tools modules cleaned up — Standardized the You May Also Like / Related Tools section across 15 tool pages, removed leftover duplicate legacy blocks, and aligned the structure with the current black-and-white reference template.
• How it works coverage improved — Added a clear three-step How it works section to daily-planner.html, extract-text.html, flip-image.html, gradient-generator.html, markdown-editor.html, and text-diff.html.
• Status page totals normalized — Fixed the mismatch where total could exceed last30 despite the public May 6 tracking note. public-stats.php now aggregates only the current public tracking window starting on 2026-05-06.
• Tracking coverage completed — Added the missing tracker.js beacon to holidays.html, bringing anonymous page-load tracking coverage to all 65 / 65 functional pages.

• Analytics storage hardened — track.php no longer writes raw IP addresses or raw stable visitor IDs to daily analytics files. Both ips and uvs are now stored as day-scoped SHA-256 hashes.
• Historical analytics scrub completed — Existing daily JSON files were batch-migrated so legacy raw entries were replaced with hashed values. The cleanup converted 650 raw IPv4, 181 raw IPv6, 763 raw UID and 2 legacy MD5 entries, with a pre-scrub server backup saved as analytics-backup-20260526-status-scrub.tgz.

• Template consistency improved — Tool pages now follow a more consistent mid-page structure between primary tool UI, explanatory content, and related navigation modules.
• Status wording clarified — The public status page now consistently describes these counters as visits / page loads instead of tool uses, matching the actual page-load beacon model.
• Release docs updated — toolknitSkill.md now records the fixed public tracking start date, 65/65 tracking coverage, hashed analytics storage rules, and the historical scrub baseline.
• Service worker cache bumped to v56

• Flashcard Maker Online Free — A long-tail study guide covering front/back card creation, flip review, quiz mode, CSV/TXT import, JSON backups and private localStorage decks.
• Online Signature Maker Free — A practical transparent PNG signature guide for drawing or typing signatures for PDFs, forms, documents and email workflows.
• Online Metronome Free — A rhythm practice guide for BPM, tap tempo, time signatures, subdivisions, guitar, piano and drum practice.

• Holidays Event noise reduced — All 15 country pages under /holidays/ were moved away from Event rich-result markup and now use a cleaner CollectionPage + ItemList pattern to better match country holiday directory intent.
• Tool schema normalized — Removed unverifiable aggregateRating markup from all 64 tool pages and added BreadcrumbList so tool templates follow a cleaner, lower-risk structured data baseline.
• Blog schema normalized — Added BreadcrumbList across 74 blog article pages and aligned the homepage SearchAction with a real ?q= search flow.

• Homepage footer categories now work — Footer category links now scroll back to the Tool Library, apply the matching filter, and center the active category tab instead of only changing the URL hash.
• Sell With Boost badge added — Added the requested homepage footer badge using the provided dofollow-compatible link format.

• Content library updated — Blog index, sitemap, homepage content modal and release documentation now reflect 103 published resources: 65 Blog Guides, 9 Tool Tales and 29 Changelog entries.
• Release docs updated — toolknitSkill.md now records the current schema baseline, the holidays directory rule, the tool/blog breadcrumb requirement, and the footer interaction fix.
• Service worker cache bumped to v51

• Flashcard Maker — Create front/back study cards, flip through a deck, shuffle review order, and quiz yourself with Reveal plus Again/Good/Easy self-rating. Try it →
• Private study workflow — Decks autosave in localStorage, import CSV/TXT pairs, export JSON backups, and use Space plus arrow-key shortcuts for fast review.

• Signature Maker preview contrast — When black ink is selected in draw or type mode, the preview area now switches to a white preview background so the signature remains visible while editing.
• Transparent output preserved — The white preview is visual only; downloaded and copied PNG signatures still keep a transparent background.
• Homepage content count updated — The homepage article/resource total now reflects 99 published resources after this changelog entry.

• Tool library updated — Homepage, search, stats, sitemap, manifest, service worker and related-tool pools now include 65 total tools, with Creative updated to 19 tools.
• Service worker cache bumped to v47

• Signature Maker — Draw your signature by hand (mouse, touch, or stylus) or type your name in elegant cursive fonts. Download as transparent PNG for documents, contracts, and emails. Adjustable pen size and ink color, undo support, and clipboard copy. Try it →
• Metronome — Free online metronome with adjustable tempo from 30 to 300 BPM, six time signatures (2/4 through 7/8), subdivisions (8th, 16th, triplet), tap tempo, and four sound types. Built on the Web Audio API with a lookahead scheduler for sub-millisecond timing accuracy. Try it →

• On-page SEO — Rewrote title tags, meta descriptions, and H1 headings for 9 high-traffic pages based on SEMrush keyword data (233 tracked keywords). Prioritized front-loading target keywords with highest search volume.
• Pages optimized: CPS Test, Random Spinner, Character Counter, Aim Trainer, Whiteboard, WebP to PNG, Keyboard Tester, Dice Roller, Reaction Time Test
• FAQ Schema fix — Removed duplicate FAQPage structured data from Extract Text tool (resolved GSC “Duplicate field” error)
• Disavow file — Created disavow.txt with 120+ spam/PBN domains for Google submission

• Total tools: 64 (Audio category now has 3 tools)
• Homepage stats refined — Replaced duplicate visible/tools counters with a clearer 64-tool total, a clickable 98-resource article count modal, 8 categories, and dynamic stable uptime based on the March 18 launch date.
• ToolKnit mascot added — Added a tiny 4-frame spider sprite above the Tool Library card. The animation uses CSS sprite steps with forward/reverse looping, stays hidden on mobile, and weighs only 416 bytes.
• Flashcard Maker planned — Documented the next tool roadmap for May 24, including localStorage decks, flip study mode, quiz mode, and CSV/TXT import/export.
• Service worker cache bumped to v43

• AI to PNG — A new browser-based converter for Adobe Illustrator files saved with PDF compatibility. Export supported AI files to PNG locally, preview every page or artboard, and download single images or a ZIP batch without uploading assets to any server.

• How to Convert AI to PNG Online — Free & Private — A practical guide covering AI file compatibility, why PDF-compatible Illustrator files matter, the best export resolutions, and how to pair the new converter with Background Remover to create transparent PNG assets.

• My second independent project is now live — A separate image-focused project officially launched today. It started around AI image generation, and it may gradually grow into its own image-first utility toolbox alongside ToolKnit.
• Release references updated — Blog index, sitemap, service worker precache, homepage counters, public stats naming, and release documentation were all updated to include the AI to PNG launch and the end-of-day IndexNow workflow.

• Hero section removed — Eliminated the standalone hero area entirely. The Tool Library card now serves as the primary above-the-fold content, giving users immediate access to tools without scrolling.
• SEO preserved — Promoted the Tool Library heading from <h2> to <h1>; all meta tags, Open Graph, and structured data remain intact.
• Content width expanded — Increased from 1200px to 1500px effective content width, with a 4-column tool grid on ≥1440px screens.
• Navigation bar refinements — Added 25px padding on each side for breathing room; pill indicator now waits for fonts.ready before measuring to fix first-visit width glitch.
• Search box alignment — Unified all container max-width and padding so the search bar, filter strip, and tool grid share identical left/right edges.
• Language toggle fix — Fixed restoreAll() corrupting filter button innerHTML when switching languages (was treating data-label as textContent).
• Full Chinese translation — Tool Library kicker, heading, description, and all four stat labels now translate correctly; added cache-busting ?v=32 to i18n.js and zh.json.

• Backlink disavow — Identified and submitted 63 spam/PBN domains to Google Search Console and Bing Webmaster disavow lists. Merged with 14 domains from an earlier April audit.
• Homepage URL canonicalization — Fixed href="./" → href="/" across 6 root-level pages to consolidate link equity on a single canonical URL.
• Nginx rewrite rules — Added www → non-www 301, /index.html → / 301 (using $request_uri to avoid index-directive loops), and /blog/tools/* → /tools/* 301 for stale external links.
• Meta description audit — Shortened 21 pages (8 tool pages + 13 blog posts) from 161–180 characters down to ≤155. Discovered and rewrote 3 blog pages (percentage-calculator, markdown-editor, unit-converter) whose descriptions were accidentally copy-pasted from the Pomodoro timer template.
• Title tag audit — Trimmed 15 blog post titles from 71–86 characters down to ≤60 to prevent SERP truncation.
• Keyword optimization — Rewrote title/description for whiteboard (now leads with “Online Whiteboard” to match search queries), keyboard-tester (shortened to 56 chars), and webp-to-png (description now includes exact search phrase + privacy angle).

• World Holidays Calendar 2026 & 2027 — 3,469 public, cultural and religious holidays across 122 countries. Global search, region/country/month/type/year filters, copy-any-date, fully browser-based with no server calls. Built on the open Nager.Date dataset plus ~50 curated cultural and religious additions (Diwali, Lunar New Year, Eid, Hanukkah, Mid-Autumn Festival, etc.).
• 15 dedicated country pages — United States, United Kingdom, Canada, Australia, Japan, China, India, Germany, France, Brazil, Mexico, Singapore, Philippines, South Korea, Thailand — each with server-rendered cards, per-country JSON-LD ItemList, month chips and a country-specific description.

• World Holidays Calendar 2026 & 2027 — 3,400+ Holidays by Country — The story behind the new feature: where the data comes from, country-by-country highlights (Japan's Golden Week, China's lunar holidays, Singapore's multicultural calendar, the surprising fact that Carnival isn't officially a federal holiday in Brazil), and the limitations we're transparent about.

• Homepage light-mode toggle — A new sun/moon button in the top-right of the homepage lets you switch between dark and light themes. Preference is stored locally and respected on the new Holidays pages too.
• Light-mode polish below the tools list — Architecture, Local Sandbox, CTA and Footer sections received a comprehensive light-mode color pass. The Local Sandbox terminal card now stays dark in light mode (it's a terminal — it should look like one) and its hover state no longer breaks.
• Sitemap, llms.txt, service-worker — All updated to include 17 new URLs. SW cache bumped to toolknit-v27.

• Mortgage Calculator — Estimate Monthly Payments & Total Interest — A practical walkthrough of monthly payment math, total interest impact, 15-year vs 30-year tradeoffs, and the 28/36 rule for first-time buyers.
• Tip Calculator — Split Bills & Calculate Gratuity Instantly — US tipping etiquette, fair bill-splitting strategies, mental math shortcuts, and how customs differ across Japan, Europe, Australia, and North America.

• Blog index updated — Calculator Tools category now lists 5 articles (up from 3). Every one of the 60 shipping tools now has a corresponding blog post. Coverage: complete.
• Site-wide consistency pass — Verified all 60 tool pages, repaired remaining stray <section> attribute artifacts, and confirmed the Pro Tips bullets render correctly across the entire catalog.

• Tip Calculator — Calculate tip amount, total bill, and per-person split. Custom tip percentage slider, preset quick-select buttons, and instant breakdown for group dining.
• Mortgage Calculator — Monthly payment estimator with principal & interest breakdown, full amortization schedule, and interactive chart. Supports custom down payment, interest rate, and loan term.

• Homepage Chinese translation — Added i18n support for the homepage. A “中文” toggle button in the top-right corner switches all visible text to Simplified Chinese. Default is English; user preference is saved to localStorage.
• Language toggle button — Appears next to Blog / Tool Tales links. One click to switch, persists across sessions. Does not affect SEO-critical elements (title, meta, JSON-LD).

• Hero kinetic typography — The homepage hero section now features a dynamic background of scrolling keyword rows. Seven rows of tool names, file formats, action verbs, and brand values scroll in alternating directions at different speeds. Pure CSS animation, zero JavaScript overhead, 60fps.
• M-layout masking — The scrolling text is masked with a CSS mask-image gradient so it only appears on the left and right sides of the content area, fading naturally at the boundaries. The central content zone stays clean and unobstructed.

• Removed experimental WebGL fluid gradient, caustic light, and particle effect scripts. The kinetic typography approach won out — lighter, cleaner, more on-brand.
• Cleaned up hero-fx.js and hero-particles.js from both local and server.

• Daily Planner — Beautiful weekly planner with customizable time slots, drag-and-drop tasks, and pixel-perfect PNG/PDF export powered by Canvas 2D API. Includes FAQ section.
• BMI Calculator — Body Mass Index with metric/imperial toggle, visual WHO category scale, color-coded results, and healthy weight range display.
• Timestamp Converter — Unix epoch ↔ human-readable date. Auto-detects seconds vs milliseconds, live ticking clock, bidirectional conversion.
• Text Diff — Compare two texts side by side with line-level and character-level diff highlighting. Summary bar for additions, deletions, and unchanged lines.
• Flip & Rotate Image — Mirror horizontally/vertically, rotate 90°/180°/270°. Canvas API powered, supports JPG, PNG, WebP, and more.
• Gradient Generator — Visual CSS gradient builder with linear/radial modes, multi-stop color picker, angle control, preset gallery, and one-click CSS copy.

• Daily Planner export rewrite — Replaced html2canvas with direct Canvas 2D API rendering. Pixel-perfect alignment, zero offset, no more CSS rendering discrepancies. Lesson learned: when a simple solution exists, use it.
• Daily Planner FAQ — Added structured FAQ section with JSON-LD for SEO rich results.
• Dynamic counting everywhere — Blog article count, category count, stories count, homepage tool count, and status page tool/category count are now all calculated dynamically from the DOM. No more hardcoded numbers to forget updating.
• Status page DR badge — Domain Rating 29 by Ahrefs, displayed alongside uptime stats in the hero card.
• Partnership link — Added to all 132 page footers for business and collaboration inquiries.

• 6 new blog posts: BMI Calculator, Timestamp Converter, Text Diff, Flip & Rotate Image, Gradient Generator, and Daily Planner Guide.
• Aim Trainer blog card added to blog index (file already existed, was just missing from listing).
• Total blog article count now 59, all dynamically calculated.

• Fixed Daily Planner export rendering — badges, date numbers, and dividers now align perfectly in PNG and PDF output.
• Fixed blog index showing 51 articles when actual count was 52 — root cause: hardcoded number. Now impossible to get wrong.
• Fixed status page hardcoded “58 tools” and “8 categories” — now fetched dynamically from search.js.

• Unit Converter — 8 categories: length, weight, temperature, area, volume, speed, data & time. Bidirectional, real-time, with conversion formulas.
• Percentage Calculator — Three modes: “X% of Y”, percentage change, and “X is what % of Y”. Color-coded results.
• Markdown Editor — Side-by-side live preview powered by marked.js. Export .md, copy HTML, word/char/line stats.

• Introduced Calculator Tools — a brand-new category housing Age Calculator, Unit Converter, and Percentage Calculator. Dedicated filter tab on homepage and blog.

• Tool count updated to 52 across all pages. Service-worker cache bumped to v18.
• Blog posts published for all 3 new tools. Blog article count now 51.
• Full-site encoding fix — repaired garbled em-dash characters (�) across 46 tool pages.
• Homepage stat pills corrected to match actual category counts.

• Fancy Text Generator — 20+ Unicode font styles. One-click copy for Instagram, TikTok, Twitter/X, Discord.
• Age Calculator — Exact age in years/months/days/hours, zodiac signs, birthday countdown.
• Typing Speed Test — WPM, accuracy & keystroke tracking with 15/30/60s timed tests.
• HEIC to JPG Converter — Batch convert iPhone HEIC photos to JPG. Adjustable quality, WebAssembly-based.
• JSON Formatter & Validator — Beautify, validate, and minify JSON. 2/4 space indent, file loading, clipboard paste.
• Invoice Generator — Create invoices & download PDF. 10 currencies, auto tax calc, unlimited line items.
• Pomodoro Timer — Focus/break intervals with session tracking, auto-start, and audio alerts.

• Tool count updated to 49 across all pages, service-worker cache bumped to v17.
• Blog posts published for all 7 new tools.
• Full-site encoding fix — repaired corrupted Unicode characters across 29 files.

• Background Remover — Remove image backgrounds instantly using an AI model that runs entirely in your browser. Auto-remove with one click or manually refine with brush & eraser tools. Supports JPG, PNG, WebP. Downloads as transparent PNG.
• AI model (~40 MB) downloads once and is cached by the browser for instant future use.
• Manual refinement mode with adjustable brush size, edge softness, undo, and keyboard shortcuts.
• Full-screen loading overlay prevents interaction until the model is ready.
• Tool count updated to 42 across all pages.

Across four straight nights ToolKnit was rebuilt from the inside out. Every page across the entire site — tools, blog, legal, changelog — was redrawn in a single, uncompromising black & white minimalist language. No more drifting blues, mismatched greens, accidental whites or stray slate borders. Just one quiet, consistent surface.

1. The 41 tool pages

• Switched the entire site typography to Space Grotesk on a `#0a0a0a` background.
• Hero pattern unified: dot grid + soft indigo glow + Back-to-ToolKnit pill + Blog / Tool Tales links.
• Old white navbar hidden site-wide via `display:none`. Tool icons, breadcrumbs, feature pills all moved to translucent white scale.
• Action buttons standardised on solid white over `#111` text; progress bars switched to white on `rgba(255,255,255,.06)`; sliders, toggles and pickers fully reskinned.
• Pro Tips, FAQ and Features blocks rebuilt to share one minimal card system: `.03` background, `.06` border, `.15` accents.

2. The colored leftover sweep

• Replaced 14 different brand-colour `rgba()` hover/glow shadows (emerald / amber / violet / orange / pink / blue / cyan / teal / rose / red / fuchsia / yellow) with white tints across all HTML and JS.
• Fixed every white-on-white button on Coin Flip, Dice Roller, Password Generator, Pixel Art Converter and Reaction Time Test by injecting inline `background:#fff;color:#111`.
• Replaced non-standard Tailwind opacities (`/8`, double opacity like `border-white/8/60`) with proper compiled values to stop pure-white fallback rendering.
• Scrubbed `assets/js/main.js`, `coin-flip.js`, `dice-roller.js`, `whiteboard.js`, `password-generator.js`, `color-picker.js`, `what-to-eat.js` of every `slate-*`, `bg-blue-*`, `text-emerald-*` and similar leftover class.

3. Tool-specific fixes from this session

• Random Spinner — white frames removed, purple shadow —white, generate button white-on-white risk eliminated.
• Ask Fate — result & process pulse glow restored from purple to white; history card & icons greyscaled.
• Keyboard Tester — emerald accents and white dividers replaced by translucent white.
• Whiteboard — toolbar invalid double-opacity classes fixed; Add-text modal blue accents —ink-black.
• What to Eat — meal tabs & result card fully recoloured.
• Character Counter, Extract Text, Lorem Ipsum — textareas, dropzones, dividers, FAQ —unified style.
• Stopwatch & Countdown Timer — digit centring fixed; Pause button visibility fixed; preset chips and progress bars normalised.
• World Clock — search input white-on-white fixed.
• QR Code Generator — Customize card padding, divider line, generate button vs section divider spacing all redone.
• Pixel Art Converter — "Hold to see original" gap, conditional divider before "How the Pixel Art Converter Works" (only after a result is rendered), bottom paragraph vs next-section divider spacing all corrected with inline styles.
• Coin Flip — gold heads restored on top of an otherwise B&W coin so heads/tails stay visually distinguishable.
• Dice Roller — dice dots restored to `#1a1a1a` so pips are visible on the white die face.
• Password Generator — length input & bulk-count select forced to dark backgrounds with custom white-arrow SVG to defeat browser-native white rendering.
• Color Picker — palette select reskinned with the same dark-arrow technique.

4. Blog redesign — new editorial language

• Blog index — replaced 3-column colourful card grid with a numbered editorial list (CSS counter `01, 02, 03…`), category-pill filter bar (sticky), category dividers with running counts, hover state lifting the row and reversing the arrow button to white.
• Tool Tales — rebuilt in the same editorial style, hero stat strip (9 stories / 9 tools used / 0 sign-ups).
• 44 individual blog post pages regenerated through a single PowerShell extractor that read each file's title, full SEO meta, JSON-LD, h1, subtitle, category, body HTML and tool URL, then rewrote them on top of one shared B&W article template.
• A second cleanup pass removed leftover bottom CTAs, related-articles sections, stray phosphor icons, duplicate `theme-color` tags and any colored gradient anchors.
• "What Is ToolKnit?" — "Explore by Category" block rewritten in the new minimal card style.

5. Legal & meta pages

• Privacy Policy and Terms of Service — both rebuilt from white pages into the same B&W layout, with a "LEGAL" badge hero, `.legal` typography (h2 separator lines, white-with-faint-underline links, marker-tinted lists) and the unified 4-column footer.
• Changelog (this page) — full visual rework: dot-grid hero, sticky timeline rail, white/translucent tags, soft `tabular-nums` dates, inline soulful note block.

6. Footer unification

• Every page now ends with the same 4-column footer: TK badge, brand description, X & GitHub icons, Popular Tools, Categories, Support & Legal, © 2026 line, Friends row and the four launch-day badges.
• Removed every old "white footer", "blue-link footer" and "narrow simplified footer" variant.

Nothing about how the tools work changed in this update. Every change is visual, structural or accessibility-related — aimed at making 41 tools feel like one tool, and one site.

• Coin Flip — Flip a coin online with a 3D CSS animation. Fair 50/50 random result, flip history, heads-vs-tails probability bar, current & best streak tracking, and spacebar shortcut for rapid flips.
• Dice Roller — Roll 1 to 6 standard dice with animated tumble. Live value distribution chart, roll history, grand total & average stats. Number keys 1–6 to switch dice count, spacebar to roll.
• Coin Flip & Dice Roller Blog Post — Guide covering when to use each tool, the math behind virtual randomness vs physical coins/dice, and 5 creative use cases.
• Terms of Service & Privacy Policy updated — Rewrote both pages to accurately reflect current site state: no accounts, no personal data collection, 500 free uses/day via localStorage, third-party analytics & CDN disclosures, and offline access via service worker.
• Replaced RewriteEmail.com footer link site-wide with B64Encode.com reciprocal link across all pages.
• Homepage updates — Coin Flip and Dice Roller added to the Creative Tools card grid, both marquee tracks, search index, and roadmap modal.
• Updated sitemap.xml, service-worker.js (bumped to toolknit-v5), and indexnow-submit.py with all new URLs.

• CPS Test — New click speed test with 1 / 5 / 10 / 30 / 60 second modes, live CPS, best 1-second burst, consistency score, per-second bar chart, and locally saved personal bests. 100% browser-based, works on desktop and mobile.
• CPS Test Blog Post — Long-form guide covering what CPS means, what counts as a good score, how each duration mode is used, common clicking techniques, and how to improve click speed safely.
• Tightened CPS Test interaction state — active runs can no longer be re-armed, and clicks after the timer ends are ignored to keep results clean.
• SEO refresh on high-impression tool pages — Rewrote titles, meta descriptions, social metadata, JSON-LD, and hero copy on Keyboard Tester, Character Counter, Whiteboard, and Reaction Time Test to better match real search intent.
• Added internal links from Reaction Time Test and Aim Trainer to the new CPS Test, and added CPS Test to their related-tools pools.
• Site search and roadmap updated — CPS Test indexed in search.js with full keyword coverage. Service worker bumped to toolknit-v4.

• Aim Trainer — New FPS aim practice tool. Click targets as fast as you can with adjustable speed (Fast / Medium / Slow), custom target count (10 / 20 / 30 / 50), 3-2-1 countdown, and detailed results including average click time, best/worst, total time, per-target bar chart, and performance rating.
• Aim Trainer Blog Post — Comprehensive guide on how to use an aim trainer, practice routines, pro tips, and benchmark scores.
• Removed login & registration system — The entire login/signup system (modals, API endpoints, JWT auth) has been removed. All users now get 500 free uses per day with no account required. Simpler, faster, no barriers.
• Deleted backend API files (login.php, register.php, verify.php, usage.php). Usage tracking is now 100% client-side via localStorage.
• Streamlined auth.js from 789 lines to 165 lines — now only handles toast notifications and local usage tracking.

• Image Resizer — Resize any image to exact dimensions, by percentage, or with one-click social media presets. Supports JPG, PNG, and WebP output with quality control. Lock aspect ratio to prevent distortion.
• Lorem Ipsum Generator — Generate placeholder text for designs, mockups, and prototypes. Choose paragraphs, sentences, or words. Toggle classic opening, optional HTML <p> tag wrapping.
• Redesigned "You May Also Like" section across all tool pages.
• Fixed homepage search missing 9 tools — all 35 tools now searchable.

• Pixel Art Converter — Turn any image into pixel art. Adjustable pixel resolution (8–256), color palette control (2–128 colors), Floyd-Steinberg dithering, Sobel edge detection outlines, saturation boost, and retro console presets (Game Boy, NES, SNES, CGA).
• Video to Audio — Extract audio from any video file (MP4, WebM, MOV) and download as lossless WAV. Uses the Web Audio API for fast, high-quality extraction.
• New blog post explaining the algorithms behind the converter.
• New blog post on browser-based audio extraction.

• Changelog page — You're reading it. A full history of every ToolKnit update, organized by date with internal links to each tool.
• Keyboard Tester now tracks keystroke counts per key. See exactly how many times each key was pressed, helping you detect stuck or double-firing keys.
• Follow our build journey on Creem.

• QR Code Generator — Create custom QR codes for URLs, plain text, Wi-Fi credentials, and email. Choose foreground/background colors, size (200–1024px), and error correction level. Download as PNG.
• Character Counter — Expanded FAQ section from 3 to 7 questions. Added comparison content and a writing length requirements table for better SEO coverage.
• Random Spinner Wheel — Updated title, heading, and description. Expanded FAQ from 3 to 6 questions.
• Optimized page titles for Image Compressor, PDF Compressor, Video Compressor, Image Grid Splitter, and Stopwatch.
• Bug fix: Removed duplicate FAQ structured data on Whiteboard that caused a Google Search Console validation error.

• Reaction Time Test — Test your reflexes with 4 game modes: click, spacebar, visual choice, and speed round. Results shown in milliseconds with performance ratings.

• Keyboard Tester — Visual keyboard map that lights up on every key press. Instantly identify broken, stuck, or unresponsive keys. Supports full-size and compact layouts.
• Random Spinner Wheel — Customizable spinning wheel with up to 15 options. Add your choices, spin the wheel, and get a random result.

• Online Drawing Board — Free whiteboard with pen, pencil, calligraphy brush, and sketch coloring modes. Add shapes, text, and images. Export your work as PNG or PDF.
• What to Eat? — Can't decide on a meal? Pick breakfast, lunch, or dinner and get a random food suggestion.
• Ask Fate — Type a yes-or-no question and receive a mystical answer. One question per day — let the universe decide.

• Image Crop — Crop images with custom aspect ratios. Supports freeform, square, 16:9, 4:3, and more.
• Image Grid Splitter — Split any image into a grid (3×3, 2×2, etc.) for Instagram carousel posts.

• Online Stopwatch — Millisecond-precision stopwatch with lap tracking.
• Countdown Timer — Set custom countdown timers with optional alarm sounds.
• World Clock — View the current time across every timezone. Search and pin your favorite cities.

• Character Counter — Count characters, words, sentences, and paragraphs in real-time as you type.
• Text Extractor — Extract text content from PDF, DOCX, XLSX, and 12+ file formats.
• MP3 to WAV and WAV to MP3 — Convert between MP3 and WAV audio formats with adjustable bitrate.

• Video Compressor — Reduce MP4, WebM, MOV, and AVI file sizes while maintaining visual quality. Powered by native browser encoding — no server uploads, no heavy WASM engine download.
• Video to GIF — Convert video clips to animated GIFs. Set start time, duration, frame rate, and output size.
• Image format converters — JPG to WebP, WebP to JPG, PNG to WebP, and WebP to PNG.

ToolKnit goes live with its first batch of core tools — all free, all browser-based, no signup required.

• PDF tools — PDF to Image, Merge PDF, PDF to Word, Word to PDF, Image to PDF, and Compress PDF.
• Image tools — Compress Image, JPG to PNG, and PNG to JPG.

The site is built with HTML, Tailwind CSS, and vanilla JavaScript. Every tool runs entirely in the browser — your files are never uploaded to any server.