evidentlycube

Automatically insert some specific content into all of your posts at a specified position. Great for automatically adding a newsletter subscription widget. The position is declared in percentage and a simple algorithm tries to find a place between two block-elements (paragraph/list/div) that is closest to the declared one.

Auto Content Inserter

Automatically insert some specific content into all of your posts at a specified position. Great for automatically adding a newsletter subscription wi …

YAHMAN

ZIPANG

When you enter the HTML code directly, the layout changes depending on the p and br tags that WordPress automatically inserts.
<pre><code>remove_filter( 'the_content', 'wpautop' );
</code></pre>
It can be solved by adding the above code. 
However, this will disable all auto-inserted p and br tags. 
It is not user-friendly.
This plugin can be partially disabled.
Just enter the part you want to disable in the shortcode.
<pre><code>[jo]your HTML code[/jo]
</code></pre>
The author of this plugin loves text editors.

Just Output

WordPress automatically inserts p and br tags, but disables them in shortcodes.

Auto Content Inserter vs Just Output