makong

Looking for the best internal linking plugin for WordPress? Look no further!
Everyone who involved in SEO knows about link building importance for getting higher rankings in Google, Bing or any other Search Engine. But really good SEOs know that internal linking is something you should not avoid. Look at Wikipedia website, their interlinking is something you need to be jealous about.
Why do you need internal links on your site? 
Because it helps you to give more contextual credits to the pages of your site, connecting them with relevant keywords.
Why to use Internal Links Generator for internal linking?
<ul>
<li>It is created by SEOs for SEOs</li>
<li>It has a few cool features you won’t find anywhere else</li>
<li>It has “noob” level easy setup</li>
<li>It works</li>
</ul>
What cool features Internal Links Generator has?
<ul>
<li>It counts how many times keywords from you list is found in your content (so you will what keywords from the list your content is lacking).</li>
<li>You can set the limit for keyword usage in your internal links (keyword priority setup, we all know that keywords are not equal).</li>
<li>You prepare everything in your beloved spreadsheets, then just import it! </li>
<li>You are able to find the keywords you want to link within the content of your website.</li>
<li>You can manually set how many words to look for before and after your keyword, which can help you find not only particular keywords but the surrounding words as well. That means that you can create a lot more variations of your anchor texts (remember: Google loves diversification in anchor texts).</li>
</ul>
So, are you ready to boost your internal WordPress SEO with Internal Links Generator? 
Don’t hesitate, hit download !
And don’t forget to leave your comments or ideas!  
We’ll gladly improve it for you!

Internal Links Generator

Looking at actual code of this plugin it's very clean.  No extra shortcodes or crap to slow down the site.  JS is compressed and css isn't too general to cludge up existing styles.
The UI is very straightforward and offers several ways to do what you want.  You define your own workflow and load keywords / target_urls however you prefer.
Works a helluva lot better than many of the other solutions without requiring a "pro" version.



Built well, simple ui and works

Simple way to automatically link a certain word or phrase in your post/page/custom content to a URL you specify.

VOID Technology

Linkable is a lightweight WordPress plugin that automates internal linking by converting defined keywords into links to selected posts or pages.
Core functionality: 
* Automatically links keywords to chosen posts or pages 
* Works on singular posts and pages by filtering <code>the_content</code> at priority 20 
* Searches for keyword matches inside <code></code>, <code><li></code>, <code></code>, <code></code>, and <code></code> tags 
* Skips self-links by excluding the current post from the keyword map 
* Uses the Yoast SEO title for link tooltips when Yoast is active, otherwise falls back to the WordPress title 
* Preserves existing <code><a></code> tags and shortcodes by backing them up before processing and restoring them afterward
Keyword management: 
* Keywords are stored per post and per page as JSON in the <code>linkable_tags</code> post meta field 
* <code>linkable_tags</code> is registered with REST support, sanitized via <code>sanitize_text_field</code>, and restricted to users with <code>edit_posts</code>
Settings: 
* Accessible via Settings → Linkable 
* <code>max_links_per_target</code>: limits how many times the same target can be linked from one post (default 1) 
* <code>first_occurrence_only</code>: when enabled, each keyword is linked only once per post
Performance: 
* Builds a global keyword map from all published posts and pages with <code>linkable_tags</code> 
* Caches the keyword map with a transient (<code>global_linkable_tag_map</code>) for one hour 
* Query optimized to fetch only IDs and avoid unnecessary meta/term caching
Editor compatibility: 
* Works with both the block editor and the classic editor 
* Enqueues an admin sidebar panel script (<code>static/js/admin-sidebar-panel.js</code>) with WordPress dependencies and versioning via <code>filemtime</code>
Security: 
* URLs are properly escaped with <code>esc_url</code> 
* Link titles are sanitized and HTML-escaped 
* Meta registration includes capability and sanitization checks
<h3>License</h3>
This plugin is licensed under the GPLv2 or later.

Linkable


I love it, when plugins doesn't get bloated with things not related to the task at hand. This just does the job, plain and simple.


Simple but functional

Automatically link keywords in your content to internal pages or posts. Simple, fast, and Gutenberg-compatible.

Internal Links Generator vs Linkable