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100% free, browser-based, your files never leave your device.
ToolKnit is a free website that gives you 91 online tools and a calendar of 3,400+ world holidays —from compressing a PDF to making a CSV chart to checking when Diwali falls in 2027 —and runs every single one entirely inside your browser. Your files never leave your device.
Why ToolKnit exists
Most "free" online tool sites follow the same pattern: you upload a file to their server, wait while they process it, and download the result —often after a signup wall, a file-size limit, or a watermark. Your files sit on someone else's machine, and you have no real way to verify what happens to them.
ToolKnit takes a different approach. Every tool on the site processes files locally in your browser using JavaScript, WebAssembly, and native browser APIs. When you compress a PDF on ToolKnit, the compression happens on your own device. When you convert an image format, the pixels are decoded and re-encoded by your browser's Canvas API. Nothing touches a remote server because there is no remote server for file processing.
This means:
- No signup required —there are no user accounts on ToolKnit at all.
- No file size throttling —processing limits are your device's memory, not an artificial paywall.
- No watermarks —output files are clean.
- No waiting in a queue —work starts instantly in your browser tab.
- Full privacy —files stay on your device from start to finish.
How many tools does ToolKnit have?
As of July 2026, ToolKnit offers 92 free tools organized into 10 categories: PDF, Image, Video, Audio, Text, Calculator, Time & Productivity, Creative & Fun, AI Tools, and Self-Test — plus a brand-new World Holidays Calendar covering 3,400+ public, cultural and religious holidays across 122 countries for 2026 and 2027. Every tool works on desktop, tablet, and mobile browsers.
Jump to: PDF · Image · Video · Audio · Text · Calculator · Time · Creative · AI · Self-Test · Desktop · Tech Stack
PDF Tools
Process PDFs entirely in your browser — compress, merge, convert, and reorder pages. No file ever leaves your device. Uses pdf-lib (WebAssembly) for direct document manipulation.
Image Tools
Resize, stitch, compress, convert, and edit images with no quality loss and zero upload. Uses Canvas API and OffscreenCanvas for hardware-accelerated rendering. AI-powered background removal included.
- Compress Image IMG
- Image Crop IMG
- Image Grid Split IMG
- Image Resizer IMG
- Image Stitcher IMG
- Background Remover AI
- HEIC to JPG IMG
- AI to PNG IMG
- Circle Crop IMG
- JPG to PNG IMG
- PNG to JPG IMG
- JPG to WebP IMG
- PNG to WebP IMG
- WebP to JPG IMG
- WebP to PNG IMG
- Pixel Art Converter IMG
- Flip & Rotate Image IMG
- Silk Screen Filter IMG
Video Tools
Trim, convert, and capture from video files — processed locally with FFmpeg.wasm and Canvas API. No upload, no waiting.
Audio Tools
Convert, analyze, and generate audio — all processed locally with Web Audio API and AudioContext.
- MP3 to WAV AUD
- WAV to MP3 AUD
- Metronome AUD
- BPM Detector AUD
- Noise Generator AUD
- Lyric Visualizer AUD
Text Tools
Writing, content creation, encoding, and data formatting utilities.
- Character Counter TXT
- Morse Code Translator TXT
- Lorem Ipsum Generator TXT
- Extract Text (OCR) TXT
- QR Code Generator TXT
- Password Generator TXT
- Text Diff TXT
- Text Animation Maker TXT
- Markdown Editor TXT
- JSON Formatter TXT
- Hash Generator TXT
- Text to Speech TXT
- Fancy Text Generator TXT
Calculator Tools
Purpose-built calculators for real decisions — age, BMI, tips, mortgages, and more.
- Age Calculator CALC
- Unit Converter CALC
- Percentage Calculator CALC
- BMI Calculator CALC
- Tip Calculator CALC
- Mortgage Calculator CALC
- Meeting Cost Calculator CALC
Time & Productivity Tools
Simple, distraction-free utilities for timing and scheduling.
- Stopwatch TIME
- Countdown Timer TIME
- World Clock TIME
- Pomodoro Timer TIME
- Invoice Generator TIME
- Timestamp Converter TIME
- Typing Speed Test TIME
Creative & Fun Tools
Interactive tools for decision-making, drawing, gaming practice, and creative work.
- Whiteboard FUN
- Random Spinner Wheel FUN
- What to Eat? FUN
- Ask Fate (Magic 8-Ball) FUN
- Keyboard Tester FUN
- Reaction Time Test FUN
- Aim Trainer FUN
- Mic & Camera Test FUN
- CPS Test (Click Speed) FUN
- Coin Flip FUN
- Dice Roller FUN
- Color Picker FUN
- Gradient Generator FUN
- Daily Planner FUN
- Signature Maker FUN
- Flashcard Maker FUN
- CSV Chart Maker FUN
- Item Locator FUN
- MIDI Keyboard FUN
- ASCII Art FUN
- ASCII Banner FUN
- Emoji Finder FUN
- Spin the Dare FUN
- Breathing Relaxation FUN
AI Tools
ToolKnit's AI-powered tools use your own API keys and run entirely in the browser, so your data stays private and never passes through ToolKnit's servers.
Self-Test Tools
Private self-checks and personal progress tools. Results and tracking data stay in your browser.
ToolKnit Desktop
In July 2026, ToolKnit launched a desktop application for Windows, built with Tauri. The desktop app runs tools locally with a native performance engine, supports batch processing, drag-and-drop import, and works fully offline — no internet connection required. The web version and desktop version complement each other: use the web for quick one-off tasks, and the desktop app for larger files or recurring workflows. Learn more about ToolKnit Desktop.
The technology behind ToolKnit
ToolKnit is a static website — no backend server, no database, no API. Every page is plain HTML, CSS, and JavaScript served from a CDN. Here's what powers the tools under the hood:
The site loads no third-party tracking scripts beyond Google Analytics and Ahrefs analytics. There are no ads, no affiliate links, and no pop-ups.
Privacy and data handling
ToolKnit's privacy approach is simple: your files never leave your device. There is no server-side processing, no cloud storage, and no temporary file hosting. When you select a file in any tool, it is read by your browser's File API and processed entirely in local memory. The output file is generated locally and downloaded directly to your device.
ToolKnit does not collect personal information. There are no user accounts, no email collection, no cookies for tracking individual users. The only data stored locally is a daily usage counter in your browser's localStorage (to enforce the 500 uses/day fair-use limit) and optional personal bests for gaming tools like CPS Test.
For the full details, see the Privacy Policy and Terms of Service.
Works offline
ToolKnit is a Progressive Web App (PWA). When you visit the site, a service worker automatically caches all tool pages and core assets. After the first visit, you can use most tools even without an internet connection. On mobile, you can add ToolKnit to your home screen and launch it like a native app.
How ToolKnit compares to other online tool sites
Most competing sites (iLovePDF, SmallPDF, CloudConvert, Convertio, etc.) upload your files to their servers for processing. Some are free for limited use and charge for larger files or batch operations. Here's how ToolKnit differs:
- No file uploads — competitors process on their servers; ToolKnit processes in your browser.
- No account required — most competitors require signup for full access.
- No file size limits — the only limit is your device's available memory.
- No watermarks — some competitors add watermarks to free-tier output.
- Offline capable — most competitors require an internet connection; ToolKnit works offline.
- Wider variety — beyond PDF and image tools, ToolKnit includes creative tools, gaming tests, timers, and decision-makers that most file-conversion sites don't offer.
The trade-off is that browser-based processing can be slower than server-side processing for very large files (e.g., 500 MB videos), and some advanced features (like PDF OCR with perfect formatting) work better with server-side AI. For everyday tasks — compressing a PDF, converting an image, timing something, or making a quick decision — ToolKnit handles it instantly and privately.
Frequently asked questions
What is ToolKnit?
ToolKnit is a free website at toolknit.com that offers 91 browser-based online tools for working with PDFs, images, videos, audio, text, charts, AI, study cards, and more. Every tool runs entirely in your browser — no files are uploaded to any server, and no account is required.
Is ToolKnit really free?
Yes. All 92 tools are completely free. There are no paid tiers, no watermarks, and no feature locks. Each tool allows up to 500 uses per day per device, tracked locally in your browser.
Does ToolKnit upload my files?
No. ToolKnit processes all files locally in your browser using JavaScript, WebAssembly, and browser APIs. Your files never leave your device.
Do I need to create an account?
No. ToolKnit does not have user accounts, logins, or registration. You can use any tool instantly by visiting the page.
Does ToolKnit work on mobile?
Yes. ToolKnit is fully responsive and works on phones, tablets, and desktops. You can also install it as a PWA on your home screen.
Can I use ToolKnit offline?
Yes. After visiting the site once, most tools are cached by a service worker and can be used without an internet connection.
What browsers does ToolKnit support?
ToolKnit works on all modern browsers: Chrome, Firefox, Safari, Edge, and their mobile equivalents. Some WebAssembly-heavy tools (like video compression) perform best on Chrome or Edge.
World Holidays Calendar
ToolKnit's newest feature isn't a file-processing tool — it's a reference. The World Holidays Calendar indexes 3,470 public, cultural and religious holidays across 122 countries for 2026 and 2027. You can:
- Search globally — type "Diwali", "Japan", or "December" and the list filters instantly.
- Filter by region, country, month, type and year — narrow 3,400+ entries down to exactly what you need.
- Copy any date with one click — pastes as
YYYY-MM-DD — Name (Country). - Browse 15 dedicated country pages — United States, United Kingdom, Canada, Australia, Japan, China, India, Germany, France, Brazil, Mexico, Singapore, Philippines, South Korea, Thailand — each with month chips, search, and a country-specific description.
The dataset is built on the open Nager.Date public-holiday API plus ~50 curated cultural and religious holidays (Diwali, Lunar New Year, Eid, Hanukkah, Mid-Autumn Festival, etc.) that pure public-holiday datasets miss. Like everything else on ToolKnit, it runs entirely in your browser — no server calls, no tracking, no signup. Read the deep-dive for the full data-sourcing story and country highlights.
Try ToolKnit
Whether you need to compress a PDF, convert an image, shrink a video, count characters, time something, make flashcards, build a CSV chart, or flip a coin — ToolKnit has a free, instant, browser-based tool for it. No signup, no uploads, no cost. Just open the tool and start.