How can you encode a string to Base64 in JavaScript?

Question

I have a PHP script that can encode a PNG image to a Base64 string.

I\'d like to do the same thing using JavaScript. I know how to open files, but I\'m not sure how

Answer 1

Please note that this is not suitable for raw Unicode strings! See Unicode section here.

Syntax for encoding

var encodedData = window.btoa(stringToEncode);

Syntax for decoding

var decodedData = window.atob(encodedData);