easyjwtby sourcastic.dev

ZERO-TRUST JWT DIAGNOSTICS

Inspect tokens.
Keep them yours.

Decode, lint, verify, and re-sign JSON Web Tokens entirely in your browser. No uploads. No accounts. No trackers.

CSP isolation active · checking local service worker

A small tool for everyday auth debugging

JWT payloads are Base64URL encoded—not secret. easyjwt turns a pasted token into an immediate security and time diagnostic without routing credentials through a third-party decoder.

JWT security guideUnderstand claims, algorithms, and expiry.Technical modelSee exactly what the browser does—and does not—guarantee.Privacy promiseNo collection. No storage. No outbound token requests.