JWT Decoder
Inspect a JWT header, payload and expiry locally without sharing the token.
Signatures, issuers and audiences are not verified. A readable or unexpired token is not proof of authenticity. Encrypted five-part tokens are not supported. All processing stays on this device.
Result
Your result will appear here after processing.
How do I use this tool?
Paste a three-part JWT to inspect its JSON header and payload. Expiration and not-before dates are checked against your device clock.
What does it support?
Signatures, issuers and audiences are not verified. A readable or unexpired token is not proof of authenticity. Encrypted five-part tokens are not supported.
Does my input leave my device?
No. Processing runs locally in your browser. Input and results are kept only on this page and are cleared when you leave, reload or clear the tool. Copy and download happen only when you choose those actions.