I just finished building 18 free dev tools that run entirely in your browser — would love your feedback

HOctavian — Fri, 20 Feb 2026 19:40:13 +0000

I finally shipped something I've been working on for a while and I'm pretty excited about it.

I got tired of landing on sketchy sites full of ads every time I needed to format some JSON or decode a JWT. So I built something cleaner.

It's called DevToolKit — 18 developer tools, all free, all running 100% client-side in your browser. No accounts, no installs, just open and use.

JSON Formatter & Validator
JSON Converter (to CSV, XML, YAML, SQL)
JSON Schema Validator
JSON Diff
CSV Viewer
Data to Excel
Base64 Encode & Decode
Image to Base64 & Back
JWT Encode & Decode
Hash Generator (MD5, SHA-256, SHA-512)
UUID Generator (v1, v4, v7)
Fake Data Generator
Regex Tester
Word & Character Counter
and more

Your data never leaves your browser.
The part I'm most proud of: you can load the page, turn off your wifi, and every single tool keeps working. No server, no API calls, nothing.
Try it — open a tool, disconnect, paste your data. It just works.

🔗 [https://www.devtool-kit.com]

Would love to hear what you think. What's missing? What could be better? I'm all ears.

Forem: HOctavian

I just finished building 18 free dev tools that run entirely in your browser — would love your feedback