Developer tools
devkit
8 tools · offline-first · no sign-up
Tools that work. Nothing else. Fast, offline-first developer utilities — format JSON, decode JWTs, test regex, all in the browser.

The problem
Every developer has the same ten tabs open for the same ten utilities — formatters, decoders, regex testers. Most of those sites are ad-supported, run slow, and stop working when the wifi flakes mid-flight.
What we built
devkit is a single fast site with the eight utilities developers reach for most. JSON formatting, JWT decoding, regex testing, UUID generation, Base64, hashing, URL encoding, and text diffing — all offline-capable and free of trackers.
- JSON Formatter, JWT Decoder, Regex Tester, UUID Generator
- Base64 Codec, Hash Generator, URL Encoder, Text Diff
- Offline-first — works without a network connection
- No sign-up, no tracking, no fluff
What's live
- 8 developer tools (JSON Formatter, JWT Decoder, Regex Tester, UUID Generator, Base64 Codec, Hash Generator, URL Encoder, Text Diff)
- Offline-first architecture — works without a connection
- No sign-up, no tracking, no advertising
- Part of the yaro-labs.com tool family