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WordPress Plugin: Simple Ajax Chat

[ Simple Ajax Chat ] Simple Ajax Chat displays a fully customizable Ajax-powered chat box anywhere on your site. SAC makes it easy for your visitors to chat with each other on your website. There already are a number of decent chat plugins, but I wanted one that is simple yet fully customizable with all the features AND outputs clean HTML markup for easy styling.

Simple Ajax Chat is based on Jalenack’s Wordspew (aka AJAX Shoutbox), which I’ve been using on my sites since the plugin was released back in 2005 (ish). Wordspew works great even today, but it hasn’t been updated in seven years, so I decided to adopt and improve the plugin with fresh code, clean markup, better control, and more features. Here’s a screenshot showing the plugin used for an imaginary, rather egocentric chat:

[ Simple Ajax Chat: Chat Box ]
Screenshot of chat-box display (view more screenshots)


Simple Ajax Chat uses Ajax to enable new chats to appear without refreshing the page. The form works great even without JavaScript, but the page is refreshed for each new message. Here is an overview of the plugin’s main features:

  • Plug-n-play functionality, no configuration required
  • Display on any post or page with the shortcode
  • Display anywhere in your theme template with the template tag
  • Includes default CSS styles and enables custom CSS from the settings
  • JavaScript/Ajax goodness loads new chats without refreshing the page
  • Also works when JavaScript is not available on the user’s browser
  • Clean markup makes it easy to style the appearance as you please
  • New chat messages fade-in with custom duration and color
  • Includes manage-chats panel for editing and deleting chats
  • Links included in chats include `_blank` target attributes
  • Includes complete map of all available CSS hooks
  • Includes built-in banned-phrases list
  • Automatic smileys supported :)
  • On-demand restoration of all default settings
  • Super-slick toggling settings page

One of my favorite new features is the built-in chat blacklist, where you can add any phrase from the settings page and have it magically disappear from the username, chat input, or URL (if enabled). With the old plugin, I had to modify the source code to block stuff, but now it’s all handled from the comfort of the WP Admin.

Customize everything

The Wordspew plugin included a minimal set of options, which is one of the reasons I found it so useful. So I wanted to keep that simplicity while adding some much-needed features. It’s a balance that I think stays true to the original. Here’s a list of things you can customize with Simple Ajax Chat:

  • Customize the update interval for the Ajax-requests
  • Customize the fade-duration for new chat messages
  • Customize the intro and outro colors for new chats
  • Option to require login/registration to participate
  • Option to enable/disable URL field for usernames
  • Option to use textarea for larger input field
  • Customize the default message and admin name
  • Customize the appearance with your own CSS
  • Option to enable/disable custom styles
  • Option to load the JavaScript only when the chat box is displayed
  • Add custom content to the chat box and chat form
  • Built-in control panel to edit and delete chats
  • Built-in blacklist to ban specific phrases from the chat

Installation & Usage

Activate the plugin and visit the SAC settings page to customize your options. Once everything is customized as you like it, display the form anywhere using the shortcode or template tag.

Shortcode & Template Tag

Use this shortcode to display the chat box on a post or page:


Use this template tag to display the chat box anywhere in your theme template:

<?php if (function_exists('simple_ajax_chat')) simple_ajax_chat(); ?>


Here are some screenshots of Simple Ajax Chat in action (using default settings):


Online demo available at WP-Mix: Simple Ajax Chat DEMO »


Download Simple Ajax Chat via the Plugin Directory:

Jeff Starr
About the Author Jeff Starr = Fullstack Developer. Book Author. Teacher. Human Being.
70 responses
  1. Since 3.5 im getting this Warning:

    Warning: Missing argument 2 for wpdb::prepare(), called in /wp-content/plugins/simple-ajax-chat/simple-ajax-chat.php on line 353 and defined in /wp-includes/wp-db.php on line 990

  2. i fixed it, on that line by adding an empty argument


  3. BTW Jeff, I’m getting a lot of bugs in latest version of WordPress. Most of them are that the options page doesnt save options i selected or wanted. Any news on when you are going to update those issues?

  4. This looks like an awesome plugin, thanks for sharing. Is it possible to use it as a livechat plugin for one to one chat, something like liveperson?

    • Jeff Starr

      My pleasure, Noumaan :) I’m not familiar with liveperson, but you can set up your WP theme for one-to-one chat using conditional statements and template tags.

  5. hi, thanks for your great work. i just installed your plugin to my wordpress site, but it does not look like screenshots or the demo. would you please help me? here’s the screenshot:

    • Jeff Starr

      Hi Farshad, it looks like an issue with existing CSS and/or settings. I would double-check all plugin settings and then use a tool like Firebug to see which existing CSS styles are interfering with the form.

  6. I think this plugin great. I love simplicity. Anyway? How to include smiliea?

  7. Hi, it sounds like a great lugin, indeed! Would it be possible to use it through the admin? It would be great for authors, contributors to chat together within the admin. Plus, I don’t think such a live chat already exists. :)

  8. Thanks for making this! It really is beautifully simple… and when I say a tech thing is simple to use, boy, I mean it!!! One question: I notice that new messages always seem to appear at the top of the list. Is there a way to flip that around? I want to make a sort of collaborative online play, and so it would be great if the thing could read like a script, with newer things appearing at the bottom…

  9. Hi! I don’t know if Jeff read my previous comment, but I still wonder if it would be possible to show the chat within the Admin instead of a new page since I use it only for the registered authors of my family blog.

    I’m also interested by Melanie’s question, I’d also like the latest message to appear at the bottom.

    I like this plugin a lot, and I’m still working with it, it’s so flexible. Neat job, thank you Jeff! :)

    • Jeff Starr

      I think it’s possible with WordPress, but the plugin is not set up to do that by default.

      The ordering of the messages is set in the plugin core files and would require a modification to do it. Let me know if you’re interested in doing so and I’ll post a method.

      Cheers :)

  10. Me again, forgot to ask: would it be possible to send a message simply using the Enter key instead of clicking on the input button ‘Say it’? Thanks :)

  11. Hi Jeff. I’m interested in the method to do it, I’ll modify the plugin core file to do it (already had to do because of missing translation) :)

    I use the textarea and when I type Enter, it does a carriage return, it doesn’t send the message. Just tried it.

    As for the possibility to have the chat dedicated to registered users only, within the Admin, would that be possible? Because I don’t want non registered be able to see the chat messages.

    PS: I managed to customize the CSS, that’s awesome. Only thing is the area to paste the CSS code in small… Couldn’t it be easier to call an external CSS from the current theme for example?

    • Jeff Starr

      Here is a live demo of the current version with “press enter to chat” working:

      I’ll look into the method for customizing chat order after I’m back in the office.

      Yes, you may also include CSS for the plugin via any other method, including theme files, functions, etc.

  12. Enter sends the message in your chat, no in mine, do you know why?

    Thanks for looking into the method for customizing chat order :)

    About the CSS, how can I specify the path for the external CSS? In the plugin core file maybe?

    Concerning the possibility to make the chat ‘private’ (only viewed by registered users), I guess I will have to password protect the page.

    Thanks again!

    • Jeff Starr

      It sounds like maybe the JavaScript isn’t being included with the web page. If you search the source code of your chat page, you should find “sac.php” included via <script> tag..

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