JWT Decoder
Decode JSON Web Tokens to inspect the header, payload, signature segment, and expiration status. Signature verification is not performed.
What is a JWT?
A JSON Web Token is a compact token made of three Base64URL-encoded parts: header, payload, and signature. The header describes the algorithm, the payload contains claims, and the signature lets a server verify that the token was not altered.
This decoder is useful for inspecting claims such as sub, iat, exp, issuer, audience, and custom application fields. It does not verify the signature.
Can this tool verify JWT signatures?
No. Signature verification requires the secret key or public key. This page only decodes the token so you can read its contents.
What does exp mean?
exp is the expiration time as a Unix timestamp. The decoder converts it into an ISO date and marks whether it is expired.