JWT Token Decoder

JSON Web Tokens (JWT) are the standard for authentication and authorization in modern web applications. However, debugging JWT issues requires the ability to inspect token contents. Our JWT decoder instantly parses any JWT and displays its header, payload, and signature sections in a readable format.

The tool also checks expiration timestamps, showing whether the token is still valid or has expired. All decoding happens locally — your tokens are never sent to any server, making it safe for production tokens containing sensitive user data.