Window btoa()

Encode a string in base-64:

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

Description

The btoa() method encodes a string in base-64.

The btoa() method uses the "A-Z", "a-z", "0-9", "+", "/" and "=" characters to encode the string.

Use the The atob() method to decode a base-64 encoded string.

window.btoa( string)

Parameter	Description
string	Required. The string to be encoded.

Type	Description
A string	The base-64 encoded string.

btoa() is supported in all browsers:


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