WooThemes

Daan Kortenbach

Enables a preview mode for widgets. In preview mode, widgets are only visible for admins.

WP Widget Preview

Enables a preview mode for widgets. In preview mode, widgets are only visible for admins.

zeitwesentech

jtwg

This plugin allows you to create previews of links similar to common social networks when sharing a link.
It works by fetching the link URL and examining either the facebook Open Graph properties or Twitter card tags including any preview image. 
Any title, description or image is stored inside this WordPress’ own database and subsequently used from there to render the Beautiful Link Preview.
Usage:
WordPress versions 5.5 or greater with the Gutenberg block editor enabled will have a Beautiful Link Preview block that can be added directly to posts.
For the Classic editor, or WordPress versions earlier than 5.5, just add the following shortcode to any HTML block in your post or page:
<pre><code>[beautiful_link_preview url="https://zeitwesentech.com"]
</code></pre>

Beautiful Link Preview

I'm the author of this plugin - so of course I give myself 5 stars :-) 

If you have any problems with this plugin - please file a topic in tab "Support" and I will be happy to find a solution.

Hey users

Creates previews of links with title, description and preview images similar to sharing links on social networks.

WP Widget Preview vs Beautiful Link Preview