Decode and inspect JSON Web Tokens (JWT) to view the header, payload, and signature. Perfect for debugging authentication tokens and understanding token structure.
JWT (JSON Web Token) is a compact, URL-safe token format used for securely transmitting information between parties. It consists of three parts separated by dots: header.payload.signature.
This tool only decodes JWTs on the client-side. No data is sent to any server. However, be cautious when decoding JWTs that contain sensitive information, as they will be visible in your browser.
A JWT typically contains a header (algorithm and token type), a payload (claims like user ID, expiration time, etc.), and a signature (used to verify the token's authenticity).
No, this tool only decodes and displays the JWT structure. Signature verification requires the secret key or public key, which should never be entered into a web tool for security reasons.
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