JS Storage Object JavaScript Window Object

Window atob() Method

atob()Method decodes base-64encoded.

This method decodes the string that has beenbtoa()A string of data encoded by the method.

Syntax:

window.atob(encodedStr)

Example

var str = "Hello World";
var enc = window.btoa(str);
var dec = window.atob(enc);
var ans = "String Encoding: "　+　enc　+　"<br>"　+　"String Decoding: "　+　dec;

Test and See‹/›

Browser Compatibility

The numbers in the table specify the first browser version that fully supports the atob() method:

Method
atob()	Is	1	Is	Is	10

Parameter Value

Parameter	Description
encodedStr	A string encoded by the btoa() method

Technical Details

Return Value:	A string representing the decoded string

Related References

Window (Window) Reference:btoa() Method

JavaScript Window Object