JWT Decoder
Decode a JSON Web Token to read its header and payload, with a live expiry badge — locally, no signature check.
Header
Payload
How to use
Paste a JSON Web Token to see its decoded header and payload. Timestamp claims like exp and iat are annotated with readable dates, and an expiry badge tells you at a glance whether the token is still valid. This decodes only — it does not verify the signature — and runs entirely in your browser, so tokens never leave your device.