Decode header and payload, inspect signature, and quickly see whether token is expired or not yet valid.
1. Paste your token into the JWT token field.
2. Click Parse token.
3. Review decoded header and payload, then check expiration and known claims.
This is useful when debugging API authentication, checking access tokens, or reviewing claim values before deployment.
Invalid format: token is missing one of the required dot-separated parts.
Invalid base64url: one segment contains unsupported characters.
Expired token: the exp claim is older than current time.
Not yet valid: the nbf claim is in the future.
Does this page send token data to a server?
No. Decoding runs in your browser.
Does this parser verify signature?
No. It decodes token parts and displays claims, but cryptographic verification is not performed.
Can I inspect standard claims?
Yes. You can quickly check exp, iat, nbf, iss, aud, and sub when present.
JSON Compare for checking payload JSON syntax.
XML Compare for checking structured API responses in XML.
Text Compare for reviewing config and policy changes line by line.