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CSS Base

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Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

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These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

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Code Indentation


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Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.


Drag a ong or pdf file from your desktop 
and drop it on the dropzone.

It acts like a standard input type file when 
the parent form is submitted.

If it doesn't work properly in the codepen window
please try the url below:



I end up developing a jQuery plugin...

You can fork it on Github:

Here is the quick demo:


<div id="dropzone">
  <input type="file" accept="image/png, application/pdf" />
              body {
  background: #333;

#dropzone {
  position: relative;
  border: 10px dotted #FFF;
  border-radius: 20px;
  color: white;
  font: bold 24px/200px arial;
  height: 200px;
  margin: 30px auto;
  text-align: center;
  width: 200px;

#dropzone.hover {
  border: 10px solid #FE5;
  color: #FE5;

#dropzone.dropped {
  background: #222;
  border: 10px solid #444;

#dropzone div {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;

#dropzone img {
  border-radius: 10px;
  vertical-align: middle;
  max-width: 95%;
  max-height: 95%;

#dropzone [type="file"] {
  cursor: pointer;
  position: absolute;
  opacity: 0;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
              $(function() {
  $('#dropzone').on('dragover', function() {
  $('#dropzone').on('dragleave', function() {
  $('#dropzone input').on('change', function(e) {
    var file = this.files[0];

    if (this.accept && $.inArray(file.type, this.accept.split(/, ?/)) == -1) {
      return alert('File type not allowed.');
    $('#dropzone img').remove();
    if ((/^image\/(gif|png|jpeg)$/i).test(file.type)) {
      var reader = new FileReader(file);

      reader.onload = function(e) {
        var data = e.target.result,
            $img = $('<img />').attr('src', data).fadeIn();
        $('#dropzone div').html($img);
    } else {
      var ext = file.name.split('.').pop();
      $('#dropzone div').html(ext);
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