JWT Decoder
Professional JSON Web Token decoder and analyzer for authentication tokens.
JWT Token Input
JWT Information
What is JWT?
JSON Web Tokens are a secure way to transmit information between parties as JSON objects. They consist of three parts: Header, Payload, and Signature.
Security Note
This tool only decodes tokens client-side. Signature verification requires the secret key and should be done server-side for security.
Privacy
All decoding happens in your browser. No tokens are sent to any server or stored anywhere. Your data remains completely private.