Developer Tools Documentation

The optional Developer Tools plugin makes it possible to configure CKEditor 4 to display information about dialog window elements, including the name of the dialog window and its tabs as well as the ID and type of each dialog window UI element.

This feature is only useful in the development phase and should not be used in production environment. Note that it works with all CKEditor 4 dialog windows, including the ones that were created by custom plugins, so you can use it both when customizing official CKEditor 4 plugins and creating your own ones!

The following sample presents a classic editor instance with with the Developer Tools plugin enabled. Open any of the editor dialog windows and hover its field or tab with your mouse to see the tooltip. Refer to the Using Developer Tools to Customize Dialog Windows article to learn more about this feature.

<h1><img alt="Saturn V carrying Apollo 11" class="right" src="assets/sample.jpg"/> Apollo 11</h1>

<p><strong>Apollo 11</strong> was the spaceflight that landed the first humans, Americans <a href="http://en.wikipedia.org/wiki/Neil_Armstrong">Neil Armstrong</a> and
				<a href="http://en.wikipedia.org/wiki/Buzz_Aldrin">Buzz Aldrin</a>, on the Moon on July 20, 1969, at 20:18 UTC. Armstrong became the first to step onto the lunar surface 6 hours
				later on July 21 at 02:56 UTC.</p>

<p>Armstrong spent about <s>three and a half</s> two and a half hours outside the spacecraft, Aldrin slightly less; and together they collected 47.5 pounds (21.5&nbsp;kg) of lunar
				material for return to Earth. A third member of the mission, <a href="http://en.wikipedia.org/wiki/Michael_Collins_(astronaut)">Michael Collins</a>, piloted the
				<a href="http://en.wikipedia.org/wiki/Apollo_Command/Service_Module">command</a> spacecraft alone in lunar orbit until Armstrong and Aldrin returned to it for the trip back to
				Earth.</p>

Get Sample Source Code

Developer tools

<!doctype html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="robots" content="noindex, nofollow">
  <title>Developer tools</title>
  <script src="https://cdn.ckeditor.com/4.25.0-lts/standard-all/ckeditor.js"></script>
</head>

<body>
  <textarea cols="80" id="editor1" name="editor1" rows="10">&lt;p&gt;This is some &lt;strong&gt;sample text&lt;/strong&gt;. You are using &lt;a href=&quot;https://ckeditor.com/&quot;&gt;CKEditor&lt;/a&gt;.&lt;/p&gt;</textarea>
  <script>
    CKEDITOR.config.devtools_styles =
      '#cke_tooltip { line-height: 20px; font-size: 12px; padding: 5px; border: 2px solid #333; background: #ffffff }' +
      '#cke_tooltip h2 { font-size: 14px; border-bottom: 1px solid; margin: 0; padding: 1px; }' +
      '#cke_tooltip ul { padding: 0pt; list-style-type: none; }';

    CKEDITOR.replace('editor1', {
      height: 250,
      extraPlugins: 'devtools',
      removeButtons: 'PasteFromWord'
    });
  </script>
</body>

</html>