JWT Decoder

Decode JSON Web Tokens instantly with expiry warnings and claim explanations.

Client-Side Only

Encoded Token

Header

Payload

Local-First Verification

This JWT Decoder runs entirely in your browser. All calculations happen locally on your device.

✔ No data sent to server (Check DevTools Network tab)
✔ Zero-Log policy (We don't even have a database)
✔ Works 100% offline