The default WordPress “shortlink” URLs look like this: <code>http://www.example.com/blog/?p=123</code>, where “<code>123</code>” is actually a 7+ digit decimal number. This plugin shrinks your shortlinks by encoding that number into only 4 characters, and using the abbreviated URL prefix of your choice.
On my site, the default shortlinks are 35 bytes long, even though I have a very short domain name. This plugin shrinks them to 21 total bytes, which is comparable to most public URL-shortener services, and better than many.
E.g., this: <code>http://www.jwz.org/blog/?p=13240780</code> 
becomes: <code>http://jwz.org/b/ygnM</code>
This doesn’t affect your (long) permalinks: those can still be in whatever format you like.

Base64 Shortlinks

This plugin makes your shortlinks shorter!

easywoomanager

This plugin adds an admin menu page to display shortlinks for all posts, pages, and products in WordPress. You can search a post/page/product by name and copy its shortlink.
In the rapidly evolving digital era, attention spans are dwindling, making brevity a crucial factor. So, what’s the solution? Easy Short Link Manager, an innovative WordPress plugin that transforms lengthy and unappealing URLs into sleek, compact links. 
With Easy Short Link Manager, you can elevate your website’s user experience, streamline content sharing, and boost your online presence like never before!
Prominent Value: Simplify and Embellish Your Links 
Easy Short Link Manager brings clarity to the forefront, offering a powerful tool to simplify your website’s URLs without compromising functionality. The plugin efficiently shortens lengthy and complex URLs, making them more visually appealing and accessible to share across various platforms, including social media, emails, posts, WhatsApp, SMS, and more. Also, not only are all the links based on your domain, but you no longer need to send a link with an external system’s domain. This will surely boost the image of your business and convey a sense of professionalism and novelty.
<h3>Benefits of Use</h3>
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Improves User Experience: Long URLs can be unwieldy and off-putting for site visitors. Easy Short Link Manager helps you create concise and user-friendly links that are easy to remember and type, increasing the chances of users revisiting your content.
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Enhances Social Media Engagement: Sharing content is a snap with Easy Short Link Manager. No matter which marketing platform you use, social media, WhatsApp, SMS, Messenger, or other, the compact links look cleaner and free up valuable character space for engaging captions and hashtags, driving higher click-through rates and fostering better audience engagement.
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Comprehensive Link Tracking:Easy Short Link Manager empowers you with valuable insights through its advanced link tracking feature. It allows you to monitor the performance of your shortened links, track click-through rates, and quickly identify the most popular content on your site.
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Customizable Links: Personalize your short links and incorporate your brand name or relevant keywords. Customizing your links not only reinforces your brand identity but also helps in building trust with your audience.
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Data-Driven Decision Making: Easy Short Link Manager provides access to real-time analytics and data reports, allowing you to make informed decisions about your marketing strategies. Identify your best-performing content, optimize your campaigns, and outpace the competition.
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Groundbreaking Streamlined Sharing: Whether it’s a new post, product, page, or other, Easy Short Link Manager’s innovative system automatically creates a link when adding a new item, effortlessly boosting your content’s reach as each item becomes instantly shareable.
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Fast and Sufficient Search: Easy Short Link Manager’s user-friendly interface allows you to perform a search by articles and copy the shortened link quickly and conveniently.
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Effortless Link Management: Easy Short Link Manager presents a convenient and easy system for managing shortened links. With the powerful features of intuitive search options, date sorting, and more, applying shortened links has never been more accessible. Simplify your process and improve your efficiency with this effortless solution.
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<h3>Usage</h3>
To display shortlinks for all posts, pages, and products, activate the plugin and search to the “Easy Woo Shortlink Manager” in admin menu.

Easy Woo Shortlink Manager

This plugin adds an admin menu page to display shortlinks for all posts, pages, and products in WordPress. You can search a post/page/product by name  …

Base64 Shortlinks vs Easy Woo Shortlink Manager