I often needed quick ways to convert small datasets while prototyping APIs or exploring data.

Most online tools require uploading files, login and signup, which feels slow and sometimes risky for sensitive data.

So I built a small browser-based toolset that runs entirely on the client side.

Current tools: - CSV → JSON converter - JSON → CSV converter - CSV → Line Chart generator

You can paste data directly and get instant results.

Everything runs in the browser (no file uploads on server).

I'm planning to add more utilities like: - CSV → multi-line charts - JSON → charts - more small data tools

Would love feedback on what data utilities people wish existed but can't easily find.