base64util

base64 encode/decode utility for browsers and node.js, with polyfill and URL friendly format.

Works with multi-byte and utf8 strings.

Usage

Include base64 the way you like (AMD/CommonJs/script)

// Encodes multi-byte string as utf8 to base64 (common String)
base64.encode('plain') ;

// Decodes to multi-byte string if utf8-encoded as base64
base64.decode('base64');

// same as encode/decode, but instead of "/" and "+" uses "_" and "-" (URL friendly)
base64.urlEncode('plain') ;
base64.urlDecode('base64');

// encode/decode byte-string - 8bit per char - used for binary data
base64.byteEncode('plain') ;
base64.byteDecode('base64');

// Encode byte-string for URL
base64.byteUrlEncode('plain') ;
base64.byteUrlDecode('base64');

Polyfill

if ( typeof atob === 'undefined' ) {
    var window.atob = base64._atob;
    var window.btoa = base64._btoa;
}

or

base64.polyfill(window);

String.prototype methods

// Add String.prototype methods:
bindProto(String.prototype)

'plain'.base64ByteEncode() ;
'base64'.base64ByteDecode();

'plain'.base64Encode() ;
'base64'.base64Decode();

'plain'.base64ByteUrlEncode() ;
'base64'.base64ByteUrlDecode();

'plain'.base64UrlEncode() ;
'base64'.base64UrlDecode();