1function convertImgToBase64URL(url, callback, outputFormat){
2    var img = new Image();
3    img.crossOrigin = 'Anonymous';
4    img.onload = function(){
5        var canvas = document.createElement('CANVAS'),
6        ctx = canvas.getContext('2d'), dataURL;
7        canvas.height = img.height;
8        canvas.width = img.width;
9        ctx.drawImage(img, 0, 0);
10        dataURL = canvas.toDataURL(outputFormat);
11        callback(dataURL);
12        canvas = null; 
13    };
14    img.src = url;
15}
16convertImgToBase64URL('http://upload.wikimedia.org/wikipedia/commons/4/4a/Logo_2013_Google.png', function(base64Img){
17alert('it works');
18      $('.output').find('img').attr('src', base64Img);  
19   
20});
21
22
23//function convertImgToBase64URL will convert the image into data url