Thorsten Frommen

As of WordPress 4.4, the Get Shortlink button is hidden by default. This plugin brings it back. Yay.
Please note that the button does not exist at all in a Block Editor context. It will only show up when using the Classic Editor, for example, when editing a single attachment.

Bring Back the Get Shortlink Button

This plugin brings back the Get Shortlink button, which is hidden by default since WordPress 4.4.

Konstantin Kovshenin

The plugin creates a shorter link for every blog post, so instead of <code>http://kovshenin.com/wordpress/plugins/twitter-friendly-links/</code> you can use <code>http://kovshenin.com/712</code>. Sweet, huh? Here’s a video presentation: <a href="http://kovshenin.com/archives/video-twitter-friendly-links-for-wordpress/" title="Twitter Friendly Links for WordPress" rel="nofollow ugc">Twitter Friendly Links for WordPress</a>
<ul>
<li>Easy to setup and configure</li>
<li>Switch between 302 (temporary) and 301 (permanent) redirection</li>
<li>Lists all your posts/pages/attachments with short links to each</li>
<li>Shows the short link in the edit post/page form together with the text you can tweet out (trimmed to 140 characters) and a link to Twitter with the predefined text</li>
<li>You can output the twitter friendly link in your themes using the <code>twitter_link()</code> function</li>
<li>New function available: <code>permalink_to_twitter_link()</code> which takes a permalink as an argument and returns a Twitter Friendly Link (if exists)</li>
<li>Compatible with Sociable, Twitter Tools, Tweet This, SexyBookmarks and AskApache Google 404 plugins</li>
<li>Compatible with WordPress MU and BuddyPress</li>
<li>Configurable linking relations (HTML and HTTP) for rel=shortlink, and rel=canonical</li>
<li>Super easy tracking with Google Analytics! Destination links are Taggable!</li>
<li>You can now switch to alphanumeric links for sexy links with numbers and letters like example.com/s2e7</li>
<li>Caching with .htaccess option now available</li>
<li>Even shorter links with customizable shortlink base URL</li>
<li>More coming up soon!</li>
</ul>
YES, I do consider feature requests, and that is what makes this plugin work. The discussions go here: <a href="http://kovshenin.com/wordpress/plugins/twitter-friendly-links/" title="Twitter Friendly Links" rel="nofollow ugc">Twitter Friendly Links</a>

Twitter Friendly Links

Your very own TinyURL within your OWN domain! If you DO promote your blog posts in Twitter, then you MUST make your links look cool!

Bring Back the Get Shortlink Button vs Twitter Friendly Links