Documentation

DevTools Cloud is a free toolbox of everyday developer utilities — JSON formatting and diffing, JWT decoding, UUID generation, regex testing, cron building, timestamp conversion, encoding, and SQL formatting — accessible from a single site with no installation.

There's no paywall on any of the free tools. Creating an account is optional and only unlocks saving your work across devices — every tool works fully without signing in.

Every tool in the free toolbox — JSON Formatter, JSON Diff, JSON to TypeScript, JSON to Zod, JWT Decoder, UUID Generator, Regex Tester, Cron Generator, Timestamp Converter, Base64 Encoder, URL Encoder, and SQL Formatter — runs entirely in your browser. Nothing you paste into any of these tools is sent to a server.

This matters most for the JWT Decoder, since real access tokens are frequently pasted in to debug an auth issue — decoding happens locally using the browser's own base64 and JSON APIs, with no network request involved.

The one thing that is optionally sent to a server is your tool usage history, and only if you're signed in — see "Local history vs. an account" below.

Press ⌘K (or Ctrl+K on Windows/Linux) anywhere on the site to open the command palette, type part of a tool's name, and hit Enter to jump straight to it. It's also reachable by clicking the search bar in the header.

Without signing in, the site keeps a short list of your recently used tools in your browser's local storage — visible from the Dashboard, cleared if you clear your browser data, and never sent anywhere.

Signing in (via the account menu, using Firebase Authentication) creates a profile so that future features — saved projects, collections, and cross-device history — can be tied to your account. Signing in does not change how the free tools themselves process data; it only affects what gets saved and where.