JavaScript – Get SHA-256 Hash of a String

This post shows you how to get SHA-256 hash of a string using JavaScript.  To do this, we need to use thirty party SHA-256 JS libraries such as js-sha256.

Follow the below guides to integrate the js-sha256 library in your application.

1. Installation

• Download the library manually:

You can download it on its github repository.

• Via bower:

bower install js-sha256

• Via node.js/npm:

npm install js-sha256

2. Include the library in your application

<script src="path/to/sha256.js"></script>

or if you use node.js

sha1 = require('js-sha256');

or if you use AMD

require(['path/to/sha256.js'], function(sha1) {
   // CODE GOES HERE
});

3. Usage

• Way 1:

var myMessage = 'The quick brown fox jumps over the lazy dog';

// hash the message
var hashed = sha256(myMessage);

console.log(hashed);

• Way 2:

var myMessage = 'The quick brown fox jumps over the lazy dog';

// hash the message
var hash = sha256.create();
hash.update(myMessage);
var hashed = hash.hex();
console.log(hashed);

Output:

d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592