JWT Decoder
Decode and inspect JSON Web Tokens (JWTs) securely in your browser
Header
DecodedPayload
DecodedToken Details
Issuer (iss)
-
Issued At
-
Expiration
-
Algorithm
-
Status
-
Verify Signature
Signature verification not supported for algorithm . Use HS256, HS384, HS512, RS256, RS384, RS512, ES256, ES384, or ES512.
none algorithm. It is not cryptographically signed and can be forged.
Understanding JWTs
How JSON Web Tokens work and why they're important
What is a JWT?
JWT (JSON Web Token) is an open standard for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed.
JWT Structure
JWTs consist of three parts separated by dots: header.payload.signature. The header typically contains the token type and the signing algorithm being used.
Security Best Practices
Always validate JWT signatures, check expiration times, and never store sensitive data in a JWT payload as they can be decoded (but not altered without the signature key).
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