I built 47 small AI helpers that run entirely in your browser. No signup. No upload. No tracking. They live at Korelyy ? a tool garden I've been curating for the past few months.
Here's why I went this route, and what's in there.
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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.
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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.
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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.
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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.
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Try it Browse the full collection at 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.