Window btoa() Method

Window Object

---

Definition and Usage

The btoa() method is used to create a base-64 encoded string.

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

The base-64 decoding method is atob().

Syntax

window.btoa(str)

Parameter Description:

• str: Required. The string to be encoded.

Return Value

This method returns a base-64 encoded string.

---

Browser Support

The numbers in the table specify the first browser version that fully supports the method.

Method	Chrome	Edge	Firefox	Safari	Opera
btoa()	Yes	10.0	1.0	Yes	Yes

---

Example

Example

Create a base-64 encoded string:

var str = "TUTORIAL";
var enc = window.btoa(str);
var res = "Encoded string: " + enc;

Try it »

---

Window Object