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

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

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

See Also:

The btoa() Method .

Syntax

window.atob( encoded )

Parameters

Parameter Description encoded Required.
The string to be decoded.

Return Value

Description A stringThe decoded string.

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