Joomla’s default editor (TinyMCE), would strip all kinds of special elements including iframes and stuff, which can be frustrating, since iframes are so common these days and are used for videos, maps and much more. There is an easy fix to make the editor not strip away these special elements anymore.
Make sure you are logged into your Joomla backend and navigate to the Plugin manager and search for TinyMCE.
Click the plugin name to edit the plugin settings.
Once there, select set 0, which by default is assigned to super administrators. If you want to edit the settings for a different group, select the approriate assigned set but in this tutorial, we’ll be covering the set 0 for Super administrators.
Scroll down a bit, and change the “Use Joomla Text Filter” settings to no (unless it already is) and remove everything under “prihibited elements” and change it to none.
The reason we don’t blank it out and change it to none blanking it will change it back to it’s default value (which is “script,applet,iframe”),
That should do it, you should now be able to use iframes, scripts and other elements in your Joomla editing space.
Watch video below for more