<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>js_canvas_download</title> <script type='text/javascript' src='http://cdn.staticfile.org/jquery/2.1.1/jquery.min.js'></script> <script type="text/javascript" src="http://cdn.staticfile.org/jquery.qrcode/1.0/jquery.qrcode.min.js"></script> </head> <body> <div id="qrcode"></div> <a id="download" download="qrcode.jpg"></a> <button id="save">save</button> </body> </html> <script> jQuery('#qrcode').qrcode({ 75, height: 75, text: window.location.href }); $("#save").click(function () { var canvas = $('#qrcode').find("canvas").get(0); var url = canvas.toDataURL('image/jpeg'); $("#download").attr('href', url).get(0).click(); return false; }); </script>