JWT Decoder
Decode and inspect JSON Web Token headers, payloads, and signatures with expiration time validation
How to Use This Tool
Paste your JWT token into the input field.
The Header, Payload, and Signature are decoded and displayed instantly.
Timestamp fields (exp, iat, nbf) are automatically converted to readable dates.
The expiration indicator shows whether the token is still valid or expired.
About This Tool
JWT Decoder parses JSON Web Tokens into color-coded sections — Header (algorithm and type), Payload (claims and data), and Signature. Timestamps like exp and iat are converted to human-readable dates. The expiration indicator shows whether the token is still valid. Everything runs locally — your tokens are never sent to any server.
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