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.

runen

Categories Autolink is a SEO plugin which automatically turns category names, when used in posts and pages, in links to the corresponding category URLs. Keeps the original words case in text. It’s particulary useful for bloggers who build a glossary using categories, for each time a word of the glossary is used in the site it is automatically converted in a link to its explanation.
<h3>Arbitrary section</h3>
<h3>A brief Markdown Example</h3>

Categories Autolink

Categories Autolink automatically turns category names in posts and pages in links to the corresponding categories URLs. Keeps the original words case …

Linkable vs Categories Autolink