JWT (JSON Web Token) Claims Decoder & Inspector
Decode header algorithms, payload claims, expiration timestamps, and issuer details.
JWT (JSON Web Token) Claims Inspector
Decodes Header, Claims, and Expiration timestamps in browser memory. Sensitive tokens never touch any server.
About the JWT Token Decoder & Claims Inspector
Splits a JSON Web Token (JWT) into its three base64url-encoded parts (Header, Payload, Signature) and parses claims into readable JSON.
How to Use
Paste any JWT string. The tool automatically decodes the algorithm, subject, roles, issued-at time, and expiration date.
Understanding Results
Visualizes whether a token is expired or still active and displays all authorization scopes.
Frequently Asked Questions
Can ProbeSonar steal my token?
No, parsing is executed entirely client-side; tokens are never logged or transmitted.
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