ℹ️ Note: Decoding happens client-side only. Cryptographic signature is not verified.
Decode JSON Web Tokens into readable header, payload, and expiry dates with zero server logging.
Decode JSON Web Token (JWT) headers, payload claims, and expiration timestamps locally and securely.
Encoded JWT string in standard 3-part base64 format (header.payload.signature).
Formatted, syntax-highlighted JSON representation of header claims and payload data.
Inspect user roles, scopes, issuer, and token expiration times during backend API development.
All operations for this tool execute locally in your web browser memory using client-side WebAssembly, HTML5 APIs, or local JavaScript. Your files, text inputs, and generated data never touch our servers.
Yes. Decoding happens 100% locally in your browser JavaScript. Nothing is transmitted over the network.
This tool decodes JWT payload claims for inspection without requiring your private verification secret.