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Decode, inspect, and validate JSON Web Tokens securely directly in your browser. 100% client-side privacy.
A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties. Our JWT Inspector splits the token into its Header, Payload, and Signature components, decodes the Base64Url encoding, and presents the JSON data clearly.
Absolutely. The decoding process happens entirely client-side using native browser APIs. Your authentication tokens and secrets never leave your machine.
No. Because signature validation requires the private secret key (which should never be pasted into a web tool), this tool purely decodes and inspects the token structure and expiration claims.