Javascript Browser Window btoa() Method

Introduction

Encode a string in base-64:

Click the button to encode a string in base-64.

View in separate window 

<!DOCTYPE html>
<html>
<body>
<button onclick="myFunction()">Test</button>
<p id="demo"></p>

<script>
function myFunction() {/*from  w  w  w.j a  v a2s  .c  o  m*/
  var str = "Hello World!";
  var enc = window.btoa(str);

  var res = "Encoded String: " + enc;
  document.getElementById("demo").innerHTML = "The original string: " + str + "<br>" + res;
}
</script>

</body>
</html>

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

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

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

btoa(str);

Parameter Values

Parameter Description
str Required. The string to be encoded

The btoa() method returns a String representing the base-64 encoded string.




PreviousNext

Related