bobmajdakjr

Note: this plugin requires an API key for dumpr.info. To get an API key all you need to do is create an account, then you can generate them from the Profile page.
This plugin provides an interface with the <a href="http://dumpr.info/url" rel="nofollow ugc">dumpr.info</a> api to generate short URLs for blog posts. It has a control panel built into the WordPress administration where you can fetch and manage them. URLs can be set to be automatically generated every time you add a post or not.
When a short URL is generated, it is attached to the post under the custom field dumpr-shorturl. You can render that out in your theme or where ever.
This plugin also provides nice functions that other plugins could use to integrate whatever services they need into the short URL system as well (like a plugin that posts to Twitter or Facebook, for example)
<h4>About dumpr.info</h4>
dumpr.info is a text dump and url shortening site. The URL shortening is unique because each URL has a – or a ~ in it. This character tells you what is going to happen. If the URL has a straight bar, (-) then the short URL will go straight to the original. If the URL has a curvy bar (~) then it will not go straight to the original, instead taking a detour to a preview page that shows the original link and a screenshot.
You can view all the URLs you have added by logging into the site with the account that owns the API key used.

Bob’s Dumpr URL Shorten Integration

Generate and manage short URLs for blog posts using dumpr.info.

mraliende

The Plugin adds an link preview box to your post. 
The link preview box will be displayed like in Facebook! 🙂
This plugin can be used for free for maximal 10 URL Preview Boxes.
Perhaps you are familiar with Facebook. 
When you write a post in Facebook and you paste an URL into your text, 
Facebook detects that URL and adds automatically information about that URL under your post.
This plugin does it not automatically, you have to use the extra button in the visual editor (“URL BOX”). 
Or you just write [urlpreviewbox url=”\https://….”] into your text. 
This plugin loads information about that URL from https://guteurls.de/ server.
<ol>
<li>Title of that page</li>
<li>Description of that page</li>
<li>An URL of an image</li>
</ol>
And the plugin displays it below your post.
Facebook supports only one preview box per post. 
This plugin supports many preview boxes within one post, if you want.
Do you want to see it live on production servers?
Look here (copy and paste the URLs into your browser):
Example web pages, who use it:
https://alien.de/news/
https://www.ufo-und-alienforum.de/index.php/Thread/30805-Verlassene-Orte-in-Baden-Württemberg/
https://hypnose54321.de/frankfurt/_news.php
:
HOW TO USE IT VIDEO:
http://www.youtube.com/watch?v=4_wIzQbPg84 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/4_wIzQbPg84?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
<h3>Internationalization (i18n)</h3>
Currently we have the plugin configured so it can be easily translated and the following languages supported:
<ul>
<li>de_DE – German in Germany</li>
<li>en_US – English in the U.S.</li>
<li>zh_CN – China</li>
<li>es_ES – Spanish in Spain</li>
<li>ru_RU – Russian in the Russian Federation</li>
</ul>
If your language is not listed above, feel free to create a translation. Here are the basic steps:
<ol>
<li>Copy “gurlpb-en.pot” to “gurlpb-LANG_COUNTRY.pot” – fill in LANG and COUNTRY with whatever you use for WPLANG in wp-config.php</li>
<li>Grab a transalation editor. <a href="http://www.poedit.net/" rel="nofollow ugc">POedit</a> works for us</li>
<li>Translate each line</li>
</ol>

URL-Preview-Box

That was really needed, because the automatic URL detection failed sometimes at very different designed WordPress templates.
This is the WordPress plugin, what I exactly needed. 
I use it now and will use it in the next years for sure.

Now it is possible to add manually preview boxes

This plugin adds link preview box to your post. You just copied & pasted an URL into your posting. :-)

Bob’s Dumpr URL Shorten Integration vs URL-Preview-Box