Louy Alakkad

<p>This plugin will regenerate all missing image sizes for an image when it’s chosen as a featured image for any post. Very useful when you change your template. No settings whatsoever, just activate and forget.</p>


Featured Image Resize

This plugin will regenerate all missing image sizes for an image when it's chosen as a featured image for any post. No settings whatsoever.

MartyThornley

<p>Makes local copies of all the linked images in a post, adding them as gallery attachments.</p>
<h4>Features</h4>
<h4>Credits</h4>
<p>This plugin is baszed on the work done in the “Add Linked Images to Gallery” plugin by http://www.bbqiguana.com/</p>


Import External Images

Funciona perfecto en WP 4.9

Makes local copies of all the linked images in a post, adding them as gallery attachments.

Featured Image Resize vs Import External Images