JWT (JSON Web Token) is an open standard (RFC 7519) that defines a compact and self-contained way for securely transmitting information between parties as a JSON object. This information can be verified and trusted because it is digitally signed.

A JWT typically consists of three parts, separated by dots (.).：

• Header: Usually consists of two parts: the type of the token (i.e., JWT) and the signing algorithm being used, such as HMAC SHA256 or RSA.
• Payload: Contains the claims. Claims are statements about an entity (typically, the user) and additional data.
• Signature: Used to verify that the message wasn't changed along the way, and, for tokens signed with a private key, it can also verify the identity of the sender.

All decoding operations are performed locally in your browser. Your token is absolutely secure and will not be sent to any server.