Pete Nelson

If you’ve ever wanted to make your own dynamic placeholder images web site (like <a href="http://baconmockup.com/" rel="nofollow ugc">baconmockup</a> or <a href="https://placekitten.com/" rel="nofollow ugc">placekitten</a>), this plugin is for you. Once it’s installed and you’ve added some images, you can access them at a URL with the desired height and width. Example: http://baconmockup.com/400/300/
Includes:
<ul>
<li>[dynamic-images-attribution] shortcode to display a complete list of images that can be used</li>
<li>JSON API</li>
</ul>
Be sure to check Settings/Dynamic Placeholder images to fully customize your settings.
View a demo page with my goofy dog: https://petenelson.com/dynamic-clyde-images/
Thanks to <a href="https://twitter.com/kenziemoss" rel="nofollow ugc">Kenzie Moss</a> for the plugin banner and icon.

Dynamic Placeholder Images

Serve dynamic placeholder images (like baconmockup or placekitten)

Archivarix

Archivarix External Images Importer will scan your posts and pages for external urls in src/srcset attribute for all img tags. Based on configured settings it can:
<ul>
<li>Download images from their external locations</li>
<li>Download images from Internet Archive (Wayback Machine)</li>
</ul>
You can choose what to do with images that could not be retrieved from external sources.
For further information and instructions please see <a href="https://archivarix.com/en/wordpress/" rel="nofollow ugc">Archivarix WP Plugin</a>

Archivarix External Images Importer

Works great!
I imported several posts into a site running WordPress 5.9.3 with Gutenberg and the Archivarix External Images Importer plugin imported the external images without any issues. I've tested a few other image importer plugins but none of them had the ability to scan a site and import from existing content like this one does.

Works with Gutenberg

Import external images in posts and pages from its original external sources or Web Archive if original source is unavailable.

Dynamic Placeholder Images vs Archivarix External Images Importer