WordPress.org

Author: Janis Elsts

This plugin lets you use raw HTML or any other code in your posts. Wrap a part of your post in special tags (below) to prevent WordPress from converting newlines to HTML paragraphs, escaping apostrophes and so on. Very useful if you need to add a CSS block or JavaScript to your post.

Using the plugin

To prevent a part of your post or page from being filtered by WordPress, wrap it in <!--start_raw-->...<!--end_raw--> or [RAW]...[/RAW] tags. These two versions work exactly the same, but the latter may be handy if you're using the visual editor (not recommended).

Example : This

is 

a 'test'!
<!--end_raw-->

Notes

• I strongly recommend to turn off the visual editor when you want to edit a post that contains raw HTML/JS/CSS.
• Personally, I prefer the <!--start_raw-->...<!--end_raw--> syntax. These tags are formed as HTML comments, which means they won't be visible to your visitors even if you deactivate the Raw HTML plugin. On the other hand. the [RAW]...[/RAW] tags would show up.