HTML DOM Window atob( ) Method

The Window atob() method is used for decoding a base-64 encoded string. It is used to decode a string of data which has been encoded using the btoa() method. It returns a string which represents the decoded string. 

Syntax :

window.atob(EncodedString)

Parameters Used :

• EncodedString : It is a mandatory parameter which specifies the encoded string.

Below program illustrates the Window atob() Method : 

Decoding a string encoded using the btoa() method. 

Output: 

👁 Image
After clicking the button:

👁 Image
Supported Browsers: The browser supported by Window atob( ) Method are listed below:

• Google Chrome 4
• Edge 12
• Internet Explorer 10
• Firefox 1
• Opera 10.5
• Safari 3