Alexandre Froger

<p>This plugin adds a button to the WordPress post edit screen (Classic Editor)  to regenerate all the thumbnails associated to the post using ajax.</p>


Regen. Thumbs

Regen. Thumbs - regenerate WordPress post thumbnails per post in one click!

Katsushi Kawamori

<h4>Thumbnails</h4>
<ul>
<li>thumbnail</li>
<li>medium</li>
<li>large</li>
<li>1536×1536</li>
<li>2048×2048</li>
<li>Generated with theme</li>
<li>Generated with plugin</li>
</ul>
<h4>Functions</h4>
<ul>
<li>Large image threshold</li>
<li>Exif automatic rotation</li>
</ul>


Disable Generate Thumbnails

Works nicely and do what it promises. Nice plugin.

Excellent

Select the thumbnails and functions to disable it.

Regen. Thumbs vs Disable Generate Thumbnails