This plugin hasn’t been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Ajax Comment Preview


Other preview plugins don’t know what sort of changes WordPress will make to a
visitor’s comment, but this plugin uses AJAX and other buzzwords to send each
previewed comment through WordPress’ inner voodoo.

The result? With the click of a button, your site’s visitors can preview their
comments exactly as they will appear when they submit them for realies.

Requires PHP5.


  1. Upload the plugin (the whole folder the plugin came with) to your plugins
    folder: wp-content/plugins/
  2. Activate the ‘Ajax Comment Preview’ plugin from the Plugins admin panel.
  3. Go to the Options -> Ajax Comment Preview admin panel to configure the look
    of the preview.


How do I change the look of the preview?

Go to the Settings (called “Options” in WordPress 2.6 ) -> Ajax Comment Preview
admin panel. From there you’ll be able to specify the markup used to display
the comment being previewed. The markup you enter will depend on what theme
your site is using. If you’re using Kubrick (the default theme for WordPress),
the settings that come installed with the plugin will work fine. For other
themes, I suggest the following.

  1. Go to the permalink page for a post on your site that has a few comments.
  2. In your web browser, view the Page Source of that page. You can usually do
    this by finding that option in your browsers Edit or View menu or in the menu
    that pops up when you right click on the page.
  3. Find the section of code that corresponds to one of the comments. Copy it
    into your clipboard.
  4. Paste that code into the big text box in the Options -> Ajax Comment Preview
    admin panel.
  5. Replace the text specific to that comment (author name, time, comment text,
    …) with the plugin’s special tags (%author%, %date%, %content%, …).
  6. Most themes’ code has all the comments inside one big <ol>, <ul>, or <div>
    tag. You’ll probably need to put your preview markup inside that
    “parent” tag too. Make sure it has the same class(es) as the tag in your
    theme’s code.
I click preview and nothing happens. What do I do?

Remember, you have to have WordPress version 2.6 or higher to use this plugin. If you do:

  1. Go to the plugin’s Settings page. Copy the HTML from the big text box to a text file
    (not a Word document) and save it. Now you have a backup.
  2. Delete everything in the big text box.
  3. Type “TEST” (without the quote marks) in the big text box, then hit the “Update” button.
  4. Go back to your blog, type in a comment and hit the preview button.
  5. If you see TEST come back, there’s probably a mistake in the HTML you entered in the big
    text box. Double check it and try again.
I didn’t see TEST come back. Now what?

This plugin has two files: ajax-comment-preview.php and ajax-comment-preview.js .
Did you upload them both? (You did if you were a good blogger and followed the directions.)
Make sure both of those files are on your webserver and in the same directory.

I saw TEST come back, but my comments template doesn’t work, or only some of it shows up

Are you serving your blog’s webpages as XML documents (for example with the MIME type
application/xhtml+xml)? If so (or if you don’t know what that means), try putting
xmlns=”” inside the very first HTML tag of your comment
template. So if you had:

<li class="comment">

as the first line in your comment template, change it to

<li class="comment" xmlns="">

in the big text box.

Still no luck. Any more ideas?

… Can you tell if there are any JavaScript errors when you load a post on your blog or
when you click the preview button?

Other than that, nope, I’m out of ideas.


སྤྱི་ཟླ་གཉིས་པ། 10, 2018
Great plugin, just what I needed for my comments section. 🙂
Read all 3 reviews

Contributors & Developers

“Ajax Comment Preview” is open source software. The following people have contributed to this plugin.


Translate “Ajax Comment Preview” into your language.

Interested in development?

Browse the code, check out the SVN repository, or subscribe to the development log by RSS.



  • Replace some deprecated WP functions.
  • Fix some PHP notices.


  • Compatibility with new Twenty Ten default theme.
  • Use admin-ajax.php instead of hack.


  • Add setting link to plugins page.
  • Compatibility with WordPress 2.9.