🔍 jwtlens

Decode, audit & verify a JWT — right here in your browser.

🔒 100% local — your token (and your key) never leave this page. No upload, no server.

Paste a JWT

Header

Payload

Security audit

Verify signature — offline, in your browser

Powered by jwtlens — the same engine, in a CLI: npx jwtlens scan. GitHub · MIT

Decoding & auditing run on jwtlens' pure core; verification uses your browser's Web Crypto. Nothing is sent anywhere.