Window atob()

Decode a base-64 encoded string:

let text = "Hello World!";
let encoded = window.btoa(text);
let decoded = window.atob(encoded);

Description

The atob() method decodes a base-64 encoded string.

The atob() method decodes a string that has been encoded by the btoa() method.

window.atob( encoded)

Parameter	Description
encoded	Required. The string to be decoded.

Type	Description
A string	The decoded string.

atob() is supported in all browsers:


Chrome	IE	Edge	Firefox	Safari	Opera
Yes	10-11	Yes	Yes	Yes	Yes