Sign Up for Free

RunKit +

Try any Node.js package right in your browser

This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 400,000 packages pre-installed, including jwt-decode with all npm packages installed. Try it out:

var jwtDecode = require("jwt-decode")

This service is provided by RunKit and is not affiliated with npm, Inc or the package authors.

jwt-decode v2.2.0

Decode JWT tokens, mostly useful for browser applications.

jwt-decode is a small browser library that helps decoding JWTs token which are Base64Url encoded.

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.


Install with npm, bower, or downloading from the build directory of this repository.

Use with AMD, browserify or just include with an script tag.


var token = 'eyJ0eXAiO.../// jwt token';

var decoded = jwt_decode(token);

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

Note: A falsy token will throw an error.

Can also be used with browserify or webpack by doing npm install jwt-decode and requiring:

var jwtDecode = require('jwt-decode');

Polymer Web Component

Can also be installed and used with Polymer-based wrapper.


Run grunt dev and fire a browser at http://localhost:9999/test_harness.html.

Issue Reporting

If you have found a bug or if you have a feature request, please report them at this repository issues section. Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.




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


RunKit is a free, in-browser JavaScript dev environment for prototyping Node.js code, with every npm package installed. Sign up to share your code.
Sign Up for Free