Example input and settings
eyJhbGciOiJub25lIn0.eyJzdWIiOiIxMjMifQ.Security · WEB-03Submit an issue
JWT decoder
Decode JWT headers, payloads and expiration without signature verification.
Header · Payload · ExpirationSet the input and check the result
Paste a three-part JWT to inspect its header, payload and UTC expiry derived from exp. The exp claim uses Unix seconds. Decoding does not verify the signature or establish trust or access rights.
Check the input format and options with this example before using your own data. Random values, file sizes and presentation vary with the input and settings.
What to check in the result
{"alg":"none"}
{"sub":"123"}