JWT Decoder
Decode JWT tokens instantly. View header and payload data securely in your browser.
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Decoded payload will appear here...
What is a JSON Web Token (JWT)?
A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties. It is commonly used for authentication and information exchange in web applications.
JWT structure explained
A JWT consists of three parts: header, payload, and signature. The header and payload are Base64URL encoded JSON objects, while the signature is used to verify the token's integrity.
How JWT authentication works
JWTs are used to securely transmit information between parties. After authentication, a server issues a JWT to the client, which can then be used to access protected resources.
Common uses of JWT tokens
- Authentication and authorization
- Session management
- Information exchange
How to decode JWT tokens
To decode a JWT, split the token into its three parts, Base64URL decode the header and payload, and parse them as JSON. The signature is used for verification but is not decoded here.