Christhian Gruhh

With the Use Hashtags plugin, you can easily use hashtags in your content (and your excerpt). Just type # plus a word, and the plugin will automatically convert it to a link.
The link send the user to the website search page, showing additional content that also uses that hashtag.
This can enhance the user experience, as it creates a new navigation layer inside your content.
<ul>
<li>There is no need to maintain the hashtags, just add them to your text, and it’s done.</li>
<li>This plugin is non-destructive, so it does not make any changes to how your content is saved. Only when the content is presented, the link will appear for the visitors.</li>
<li>This plugin does not generate external links.</li>
<li>Tested with selected core blocks.</li>
</ul>
Tested with popular themes:
<ul>
<li><a href="https://wordpress.org/themes/twentytwentytwo/" rel="ugc">Twenty Twenty Two theme</a>.</li>
<li><a href="https://wordpress.org/themes/twentytwentyone/" rel="ugc">Twenty Twenty One theme</a>.</li>
<li><a href="https://wordpress.org/themes/generatepress/" rel="ugc">GeneratePress theme</a>.</li>
<li><a href="https://wordpress.org/themes/neve/" rel="ugc">Neve theme</a>.</li>
<li><a href="https://wordpress.org/themes/hello-elementor/" rel="ugc">Hello Elementor theme</a>.</li>
</ul>

Use Hashtags – convert #hashtags to search links

Use #hashtags as part of your content, and improve your UX.

Lorna Timbah

Tag My Hash (#TagMyHash) is a lightweight WordPress plugin that bridges social-media-style hashtag usage with WordPress’s native tag taxonomy. This plugin scans your post content, identifies anything starting with a pound (a.k.a. hashtags sign #), and turns it into a functional part of your site’s tag structure. You no longer have to manually scroll down to the “Tags” meta box every time you want to categorise a quick update. A live front-end demo of this plugin can be found @ <a href="https://lornatimbah.com" rel="nofollow ugc">LornaTimbah.com</a>.
Features:
v.1.0: 
– Automatic hashtag detection in post content 
– Auto-create missing WordPress tags 
– Auto-assign hashtags as tags on save 
– Convert hashtags into clickable links to tag archive pages 
– Simple settings page (enable/disable + mode toggle) 
– Standard Posts support

Tag My Hash

Automatically converts #hashtags in your posts into WordPress tags and clickable links to tag archive pages.

Use Hashtags – convert #hashtags to search links vs Tag My Hash