JavaScript Base64 Encode and Decode: Encode and decode data in base64 format in pure JS

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Last Updated		Ratings				Unique User Downloads		Download Rankings
2025-07-09 (-4 hours ago)		Not enough user ratings				Total: 83		All time: 452 This week: 4

Version		License		JavaScript version		Categories
`base64` 1.0.3		GNU General Publi...		5		Text processing

Description

Author

Haseeb Ahmad Basil

This object can encode and decode data in base64 format in pure JS.

It can take a data string and encode it using the base64 algorithm.

The object can also do the opposite, i.e. decode base64 encoded data and return the original data string.

Haseeb Ahmad Basil

Performance

Level

Name:	Haseeb Ahmad Basil `<contact>`
Classes:	2 packages by Haseeb Ahmad Basil
Country:	Pakistan
Age:	27
All time rank:	149	2 in Pakistan
Week rank:	6	1 in Pakistan

Level 2

Example

<html>
	<head>
		<script src="base64.min.js" type="text/javascript"></script>
		<script type="text/javascript">			
			var bs64 = new Base64();
			var decoded = bs64.decode("VEVTVDEyMw==");
			var encoded = bs64.encode("TEST123");
			console.log('Encoded: ' + encoded);
			console.log('Decoded: ' + decoded);
		</script>
	</head>
	<body>
	<div id="example"></div>
	<script type="text/javascript">
			var exmpl = document.getElementById('example');
			exmpl.innerHTML = 'Encoded: ' + encoded + '<br />' + 'Decoded: ' + decoded;
	</script>
	</body>
</html>

Files (6)

File	Role	Description
`base64.js`	Class	Class source
`base64.min.js`	Class	Class source
`example.html`	Example	EXAMPLE
`package.json`	Data	Auxiliary data
`readme.md`	Doc.	Documentation
`test.js`	Aux.	Auxiliary script