Dropzone.autoDiscover = false; $(function() { var myDropzone = new Dropzone("#dropzone"); myDropzone.on("success", function(file,response) { console.log("raw response: "+response); if(response==null || response =="null") $("#uploadinfo").append("") else { var o = JSON.parse(response); if(o.status=='ok') $("#uploadinfo").append("") else if(o.status=='err') $("#uploadinfo").append("") console.log(o) } }); })