5 Free Developer Tools I Use Daily for Debugging and Conversions

As a developer, I find myself doing the same conversions and lookups over and over. Here are 5 free, no-signup tools that live in my bookmarks:

1. BitwiseCalc — Bitwise Operations Calculator

Need to decode a binary string into readable text? Or convert text to binary? BinTranslate supports five conversion modes: binary to text, text to binary, binary to English, binary to ASCII, and words to binary. Everything runs client-side — no data ever hits a server.

3. Epoch Converter — Timestamp Tool

Decode, verify, and debug JSON Web Tokens right in the browser. Supports HS256, RS256, ES256, and more. Great for debugging auth flows.

5. RegExr — Regex Playground

https://regexr.com/

Learn, build, and test regular expressions with a cheatsheet, reference, and real-time highlighting.

All of these are free, no sign-up, and run in the browser. Got any tools you keep coming back to? Drop them in the comments.

P.S. I built BitwiseCalc and BinTranslate myself — feedback welcome.