DevTools – 50+ developer tools AIO – JSON, Regex, JWT, Markdown and more in one browser toolbox

Summary: DevTools is a free, browser-based toolbox offering over 50 developer utilities like JSON formatting, regex testing, JWT decoding, UUID generation, Markdown and Mermaid preview, and SQL schema visualization. It runs entirely locally without login or data collection, streamlining common developer tasks in one place.

What it does

DevTools provides multiple developer utilities that operate directly in the browser, enabling tasks such as formatting, decoding, testing, and previewing without external dependencies.

Who it's for

It is designed for developers needing quick access to various coding and data tools without switching between sites or logging in.

Why it matters

It eliminates the need to open multiple websites for routine developer tasks by consolidating tools into a single, local, privacy-focused interface.