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.

LuckyWP

The “LuckyWP Wiki Linking” plugin allows to easily organize a linking in the wiki style on the website: you specify the keyword phrases for a post, and the plugin places links to this post on other website pages that have the keyword phrases are present in the text.
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/jwClpVEN6hs?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>
You DON’T NEED to manually place each individual link, the plugin will make it for you.
When placing a link in a post, whole words are only taken into account. For example, the link with the keyword phrase bus will be added to the text:
<blockquote>
She got on the bus at Clark Street.
</blockquote>
… and the link will NOT be added to the text:
<blockquote>
I’m here on business.
</blockquote>
In addition to links to the posts of the website, you can also place custom external links by specifying them when adding a keyword phrase.
<h4>The typical use cases:</h4>
<ul>
<li>When creating/changing a post we add a keyword phrase to it.</li>
<li>We click on the “Bind to posts” button next to the keyword phrase.</li>
<li>Profit! Links to the post are already available on other website pages.</li>
</ul>
In the <a href="https://theluckywp.com/product/wiki-linking/" rel="nofollow ugc">premium version</a> the second step can be skipped — links will automatically be created!
<h4>Features</h4>
<ul>
<li>Up to 30 keyword phrases for the entire website (In the <a href="https://theluckywp.com/product/wiki-linking/" rel="nofollow ugc">premium version</a> the number of keyword phrases is unlimited) and unlimited number of links to them.</li>
<li>The links is displayed ONLY on the single page of a post, in all other places (RSS feed, the editor on the control panel and etc.) this link will NOT be displayed.</li>
<li>Placing of links in the posts and the pages.</li>
<li>Placing of links in custom post types.</li>
<li>Support of links to third-party websites for keyword phrases.</li>
<li>Access to the functionality of the plugin is only for the administrator (the <a href="https://theluckywp.com/product/wiki-linking/" rel="nofollow ugc">premium version</a> also allows to configure the access for other roles).</li>
<li>Adding of keyword phrases while editing a post.</li>
<li>View the list of posts in which the link is placed.</li>
<li>Statistics on the number of links to the keyword phrase.</li>
<li>Number of links to the keyword phrase can be set.</li>
<li>Number of links in a post for each post type can be set separately.</li>
</ul>

LuckyWP Wiki Linking

The plugin allows to easily organize a linking in the wiki style on the website.

Internal Links Generator vs LuckyWP Wiki Linking