JWT Decoder
Decode and inspect JSON Web Tokens
JWT Token
JWT Structure
Header
Algorithm and token type
Payload
Claims and data
Signature
Verification signature
Header
Header will appear here after decoding
Payload
Payload will appear here after decoding
Signature
Signature will appear here after decoding
Common Claims
iss - Issuer of the token
sub - Subject (user identifier)
aud - Audience (intended recipient)
exp - Expiration time (Unix timestamp)
iat - Issued at time (Unix timestamp)
nbf - Not before time (Unix timestamp)
Security Note
This tool only decodes JWT tokens. It does not verify signatures.
JWTs are base64-encoded and can be decoded by anyone. Never store sensitive information in the payload.
Always verify JWT signatures on the server-side before trusting the token contents.