JSON Web Token

A JSON Web Token (JWT) is a compact, secure way to transmit information between two parties, typically a server and a user’s device. It contains encoded data—like user ID or permissions—that can be verified for authenticity. Think of it as a digital passport: once issued after login, it allows the user to access protected resources without needing to re-enter credentials each time. JWTs are self-contained, meaning all necessary info is inside the token, and they are signed to ensure data hasn't been tampered with, making online interactions more efficient and secure.