47 free AI tools that live in your browser (2026)

A developer has built and released 47 free, browser-based AI tools at Korelyy, a tool garden that runs entirely client-side with no signup, upload, or tracking. The collection includes writing, image, calculator, dev helper, and AI productivity tools, all built with vanilla JS and static files. The developer emphasizes the tools are free with no catch, and new tools are shipped weekly.

I built 47 small AI helpers that run entirely in your browser. No signup. No upload. No tracking. They live at Korelyy https://korelyy.com/en/ ? a tool garden I've been curating for the past few months. Here's why I went this route, and what's in there. Why browser-only? Every AI tool I tried wanted the same three things: my email, my files, and my patience. So I started porting the ones I actually use to plain HTML + vanilla JS. They run offline, they never phone home, and they cost me nothing to host. What's in the box Writing & text 8 tools - Character counter that shows platform limits X / LinkedIn / Meta - Case converter Title / sentence / camelCase - Whitespace cleaner - Markdown previewer - Lorem generator - Typographic quotes fixer - Diff checker side-by-side - Text statistics readability + grade level Image & files 11 tools - Image converter PNG / JPG / WebP - Image to PDF - PDF to images - Image resizer aspect-ratio aware - Image cropper - EXIF stripper - SVG optimizer - Favicon generator 16/32/180/192/512 - QR code generator - Barcode generator - HEIC to JPG Calculators & life 12 tools - Life weeks how many Saturdays left - Life progress bar - Sleep cycle calculator - Tip calculator - Loan calculator - Compound interest - Age in days - Date diff - Working days calculator - BMI - Calorie estimator - Random picker Dev helpers 9 tools - JSON formatter / validator - JWT decoder - UUID generator - Hash MD5/SHA-1/SHA-256 - Base64 encoder/decoder - URL encoder - Color picker with contrast checker - CSS unit converter - HTML entity encoder AI / productivity 7 tools - Emoji mixer combine any two - Tone rewriter formal / casual / friendly - Meeting agenda template - Standup notes generator - Daily planner - Pomodoro timer - Habit tracker Total: 47. How they're built - 100% client-side. The server only ships static files. - No analytics, no cookies, no third-party calls. - Most are under 300 lines of vanilla JS. A note on "free" There's no catch, no upsell, no "premium" tier hidden behind a paywall. The whole point was building things I would use myself. If a tool saves you five minutes a week, that's the deal. Try it Browse the full collection at korelyy.com/en https://korelyy.com/en/ . Available in 6 languages: English, ??, Espa?ol, Fran?ais, ??????, and ???????. If a tool is missing or broken, drop me a line. I'm shipping new ones every week.