JWT Decoder

A lightweight, client-side JWT decoder at jwt.ropean.org.

Paste any token to instantly inspect its header, payload, and signature. Nothing leaves your browser.

Features

Decodes header, payload, and signature
Interprets registered claims (sub, iss, aud, exp, nbf, iat, jti) with human-readable labels and UTC timestamps
Flags expired tokens
Auto-decodes on paste
No dependencies, no build step — single index.html

./deploy.sh

Publishes index.html to the gh-pages branch with a CNAME for jwt.ropean.org.