jwt-decode-es

jwt-decode-es is a small browser library that helps decoding JWTs token which are Base64Url encoded. This is a fork of jwt-decode library which is not really supported.

IMPORTANT: This library doesn't validate the token, any well formed JWT can be decoded. You should validate the token in your server-side logic by using something like express-jwt, koa-jwt, Owin Bearer JWT, etc.

Installation

Install with npm npm i --save jwt-decode-es

It provides ES, UMD, CJS modules.

Usage

import { jwt_decode } from "jwt-decode-es";
const token = "eyJ0eXAiO.../// jwt token";

const decoded = jwt_decode(token);
console.log(decoded);

/* prints:
 * { foo: "bar",
 *   exp: 1393286893,
 *   iat: 1393268893  }
 */

// decode header by passing in options (useful for when you need `kid` to verify a JWT):
const decodedHeader = jwt_decode(token, { header: true });
console.log(decodedHeader);

/* prints:
 * { typ: "JWT",
 *   alg: "HS256" }
 */

Note: A falsy or malformed token will throw an InvalidTokenError error.

Include with a script tag

Copy the file jwt-decode.min.js from the build/ folder to your project somewhere, then include like so:

<script src="jwt-decode.min.js"></script>

<script>
  var jwt_decode = jwt_decode_es.jwt_decode;
  var token = "eyJ0eXAiO.../// jwt token";
  var decoded = jwt_decode(token);
  console.log(decoded);
</script>

Author

Initial author Auth0 Updated to modern platform by Alexey Petushkov

License

This project is licensed under the MIT license. See the LICENSE file for more info.