JWT Decoder
Securely decode, inspect, and analyze JSON Web Tokens (JWT) payloads and headers.
About this tool
A JSON Web Token (JWT) is an open standard (RFC 7519) method for compactly representing verified claims transferred between parties. JWTs are utilized in Single Sign-On (SSO) architectures and RESTful APIs to authenticate user identities and permissions without database lookups.
This JWT Decoder parses a provided JWT into its three structural components: the Header, the Payload, and the Signature. It reverses the Base64Url encoding to display the underlying JSON objects. This allows verification of user claims, roles, and expiration timestamps (exp) embedded within the token to debug authorization configurations. This tool is free to use and requires no registration.
Reading the payload of a JWT does not require the private signing key. The parsing and decoding process executes on the client side within the browser. Session tokens are not transmitted over external networks.