JSON Web Token (JWT) is a compact, URL-safe token format that represents claims to be transferred between parties. It is composed of a header, payload, and signature, where the header declares the signing algorithm and token type, the payload contains claims such as issuer, subject, and expiration, and the signature protects integrity using a shared secret or a public/private key pair. JWT enables stateless authentication and authorization by allowing servers to verify tokens without maintaining session state, and it is typically sent in HTTP headers as Authorization: Bearer <token>. JWTs can be signed (JWS) and, in some cases, encrypted (JWE) for confidentiality.

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JSON Web Token

Compact, self-contained token carrying claims between parties.

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