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100% free, browser-based, your files never leave your device.
ToolKnit is a free website that gives you 41 online tools — from compressing a PDF to flipping a coin — 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 May 2026, ToolKnit offers 41 free tools organized into 7 categories: PDF, Image, Video, Audio, Text, Time & Productivity, and Creative & Fun. Every tool works on desktop, tablet, and mobile browsers.
PDF Tools
ToolKnit's PDF tools handle the most common document tasks without requiring Adobe Acrobat or any installed software. They use pdf-lib (WebAssembly) to manipulate PDF structures directly in the browser.
Compress PDF reduces file size by downsampling embedded images and stripping unused metadata. Merge PDF combines multiple documents into one with drag-and-drop reordering. PDF to Image renders each page as a high-resolution PNG or JPEG. Image to PDF converts one or more images into a multi-page PDF. PDF to Word and Word to PDF handle format conversion for documents.
Image Tools
ToolKnit covers image compression, format conversion, cropping, resizing, and creative effects. All image processing uses the Canvas API and OffscreenCanvas for hardware-accelerated rendering.
Compress Image reduces JPEG, PNG, and WebP file sizes with adjustable quality. The six format converters handle the most common web image conversions — useful when a platform only accepts certain formats. Image Crop gives you freeform and aspect-ratio-locked cropping. Image Grid Split slices a photo into equal tiles (useful for Instagram carousels). Image Resizer lets you set exact dimensions or scale by percentage. Pixel Art Converter turns any photo into retro pixel art with adjustable resolution, color palettes, dithering, and presets like Game Boy and NES.
Video Tools
Video processing in the browser is powered by FFmpeg.wasm, a WebAssembly port of FFmpeg. This means ToolKnit can compress, convert, and extract from video files without sending them to any server.
Compress Video reduces MP4, WebM, and MOV files with adjustable quality presets. Video to GIF converts any video clip to an animated GIF with frame rate and resolution controls. Video to Audio extracts a lossless WAV audio track from any video file using the Web Audio API.
Audio Tools
Audio conversion uses the Web Audio API and AudioContext for decoding and re-encoding between formats.
MP3 to WAV decodes compressed MP3 audio into lossless WAV format. WAV to MP3 compresses WAV files into smaller MP3 files with adjustable bitrate. Both conversions happen entirely in the browser.
Text Tools
ToolKnit's text tools help with writing, content creation, and document processing.
Character Counter gives real-time counts for characters, words, sentences, paragraphs, and reading time — useful for social media limits and SEO meta descriptions. Lorem Ipsum Generator creates placeholder text in paragraphs, sentences, or words. Extract Text uses OCR (optical character recognition) to pull text from images and scanned documents. QR Code Generator creates scannable QR codes from any URL or text with customizable size and error correction levels. Password Generator creates strong, random passwords using the Web Crypto API with customizable length (4–128 characters), character types, real-time strength analysis, and bulk generation up to 50 passwords at once.
Time & Productivity Tools
Simple, distraction-free utilities for timing and scheduling.
Stopwatch tracks elapsed time with millisecond precision, lap splits, and session history. Countdown Timer counts down from any duration with audio alerts and preset buttons. World Clock shows current time across multiple time zones side by side, useful for scheduling calls across continents.
Creative & Fun Tools
Interactive tools for decision-making, gaming practice, drawing, and random generation.
Whiteboard is a full-featured drawing canvas with pen, eraser, shapes, text, and export to PNG. Random Spinner Wheel lets you add custom options and spin to pick one. What to Eat? suggests a random meal when you can't decide. Ask Fate gives Magic 8-Ball style answers to yes-or-no questions.
Keyboard Tester detects stuck, broken, ghosting, and double-firing keys with a visual layout. Reaction Time Test measures how fast you can respond to a visual signal. Aim Trainer helps practice FPS aim with adjustable speed and target count. CPS Test measures clicks per second across multiple durations (1s, 5s, 10s, 30s, 60s).
Coin Flip simulates a realistic coin toss with 3D animation, streak tracking, and probability stats. Dice Roller rolls 1–6 dice with animation, distribution chart, and roll history. Color Picker lets you pick any color visually, convert between HEX, RGB, and HSL, generate palettes (complementary, analogous, triadic, and more), and extract colors from uploaded images.
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:
- pdf-lib (WebAssembly) — PDF manipulation: compression, merging, page extraction, metadata editing.
- FFmpeg.wasm — Video compression, format conversion, and GIF creation, all in the browser.
- Canvas API / OffscreenCanvas — Image decoding, encoding, resizing, cropping, and format conversion.
- Web Audio API — Audio decoding and encoding for MP3/WAV conversion and video audio extraction.
- Tesseract.js — Browser-based OCR for extracting text from images.
- Tailwind CSS — Utility-first styling for a consistent, responsive UI across all tools.
- Service Worker — Enables offline access via cached pages and assets (Progressive Web App).
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 41 browser-based online tools for working with PDFs, images, videos, audio, text, 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 41 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.
Try ToolKnit
Whether you need to compress a PDF, convert an image, shrink a video, count characters, time something, 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.