JWT Decoder/Encoder
Decode, verify, and create JSON Web Tokens (JWT). Easily inspect token payloads, validate signatures, and generate new tokens for authentication purposes.
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About JSON Web Tokens
JWT is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. JWTs are commonly used for:
- Authentication and authorization in web applications
- Secure information exchange between services
- Single Sign-On (SSO) implementations
JWT Structure
Header: Contains token type and signing algorithm.
Payload: Contains claims about the entity (user) and additional data.
Signature: Verifies that the sender is who they claim to be and ensures the message wasn't changed.
Format: header.payload.signature