thaikolja

Thumbnails Cleaner helps you keep your WordPress installation tidy by removing and regenerating thumbnails.
You can control all functions through the plugins’ main page found under “Tools”. You can:
<ul>
<li>Analyze your uploads directory, giving you an overview how many original files and thumbnails there are.</li>
<li>Clean thumbnails which means deleting them while keeping the original files.</li>
<li>Restore thumbnails to start out with a clean uploads directory. This function requires the plugin <a href="https://wordpress.org/plugins/regenerate-thumbnails/" rel="ugc">Regenerate Thumbnails</a>.</li>
<li>Create backups of your uploads directory to keep your files safe in the unlikely event that there is a problem.</li>
<li>Restore backups in case you have lost a file that was not supposed to be deleted.</li>
</ul>
Please see the <a href="https://www.koljanolte.com/wordpress/plugins/thumbnail-cleaner/documentation/" rel="nofollow ugc">official website</a> for a full 
documentation.

Thumbnail Cleaner

Cleans up your WordPress installation by removing and regenerating thumbnails.

Antonio D.

Christodoulos Demetriou

This plugin adds a button on the tinyMCE editor toolbar. When editing a post, clicking on the “Clear all text style 
and formating button”, allows you to remove the text style and formating from the post content as well as the images.
NO Compatible with Gutenberg!
<h3>Disclaimers</h3>
The Simple clean content plugin is supplied “as is” and all use is at your own risk.

Simple clean content

Add a button on the tinyMCE editor toolbar, that by clicking it, removes all styling from the content of a post.

Thumbnail Cleaner vs Simple clean content