Jordy Meow

Displays the metadata information in the Media Library. Regenerates the metadata and thumbnails even if they exist. This plugin is really useful when the metadata is broken. This is an extremely light plugin.
I am using this tool for debugging many installs and decided to make it available here. Try it, discuss it. Remarks are very welcome 🙂

Media Meta & Force Regenerate

No review for it yet, and probably need to be tried and reviewed by more. It does things Regenerate Thumbnails do not, it actually force regenerate the thumbnails, the metadata associated with it, and also visually display the content of this meta.

This plugin works

Displays the metadata information in the Media Library. Regenerates the metadata and thumbnails even if they exist.

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.

Media Meta & Force Regenerate vs Thumbnail Cleaner