I built 21 free dev tools that never upload your data

Every developer needs quick tools — JSON formatter, Base64 encoder, JWT decoder, regex tester, PDF compressor, GIF maker. But I always hesitated to paste sensitive data into random tool sites. Where does that data go?

So I built ToolsStack — 21 tools that run 100% in your browser.

The tools

💻 Developer: JSON Formatter, JSON→CSV, Base64, URL Encode, HTML Entities, JWT Decoder, SQL Formatter, Regex Tester, Hash Generator (MD5/SHA), Diff Checker, PDF Compressor, PDF→JPG

⚡ Generators: UUID, Password, Lorem Ipsum

📝 Text: Word Counter, Case Converter, Markdown Preview

🎨 Image: Color Picker, QR Code Generator, GIF Maker

Why another tool site?

100% client-side — nothing leaves your browser

No signup, no ads, no tracking

Vanilla JS + Canvas API — no bloated frameworks

Deployed on Cloudflare Pages — fast everywhere

Try it: toolsstack.org

Source on GitHub (update with actual repo)

I'd love to know what tools you'd want added next!