JWT Decoder
Decode and inspect JSON Web Tokens with expiration status and claim details.
JWT Token
Paste a JWT token above to decode it
About JWT
Structure
JWTs consist of three parts: Header (algorithm & type), Payload (claims), and Signature (verification). Separated by dots.
Common Claims
Standard claims include: iss (issuer), sub (subject), exp (expiration), iat (issued at), aud (audience).
Expiration
The exp claim contains a Unix timestamp. This tool shows real-time expiration status with countdown.
Security Note
This tool only decodes JWTs for inspection. It does not verify signatures or validate token authenticity.
All decoding happens locally in your browser. No data is sent to any server.
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