Where does JWT store secret key?

Generate a token in the https://jwt.io/ website by using the following steps:

JWT is created with a secret key and that secret key is private to you which means you will never reveal that to the public or inject inside the JWT token . When you receive a JWT from the client, you can verify that JWT with this that secret key stored on the server.

A JWT needs to be stored in a safe place inside the user’s browser . If you store it inside localStorage, it’s accessible by any script inside your page. This is as bad as it sounds; an XSS attack could give an external attacker access to the token.

JWT stands for JSON Web Token. JSON Web Token (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 . This information can be verified and trusted because it is digitally signed.