ToolKnit

ToolKnit is a free, all-in-one online toolkit with 30+ browser-based tools for everyday file tasks. Compress PDFs, images, and videos. Convert between formats like JPG, PNG, WebP, MP3, WAV, and more. Edit documents, crop images, split grids for Instagram, and even generate QR codes — all without uploading a single file to any server. Every tool runs 100% in your browser using modern Web APIs (Canvas, WebAssembly, FFmpeg.js), so your files never leave your device. There are no signups, no watermarks, no file size limits, and no hidden fees. Beyond file tools, ToolKnit also includes a suite of creative and productivity utilities: an online whiteboard with multiple brush modes, a real-time character counter, a keyboard tester with keystroke counting, a customizable spinner wheel, a reaction time test, a world clock, countdown timers, and more. Whether you need to quickly compress a PDF before emailing it, convert a batch of images for your website, or test every key on a new mechanical keyboard — ToolKnit has you covered, instantly and privately.