Security tool
JWT Decoder & Inspector
Decode token structure, inspect claims, and spot trust issues before using a JWT.
Paste a token to see decoded claims and risk warnings.
Decoding runs locally in your browser. Signature verification is not performed by this tool.
Readable Token Decode
Decode header and payload into formatted JSON blocks for quick debugging.
Claims Timeline
Show iat, exp, and nbf timestamps as readable dates to check validity windows.
Risk Signals
Highlights missing expiration, expired tokens, future nbf, and insecure alg settings.