ELsMystERy

Easy Taxonomy Support, by <a href="http://spectrumvisions.com" title="Spectrum Visions" rel="nofollow ugc">Spectrum Visions</a>, makes it easy to add post tag and category support to pages and custom post types.
Custom post type support will prevent post tags and categories that are associated with custom posts from returning “nothing found”, or 404 errors. With the page tags and/or categories enabled, you can add tags to pages and assign pages to categories.
<h3>Show the Love</h3>
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Features
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Add tags and categories to WordPress pages.
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Allows tags on custom post types with the “post_tag” taxonomy to function without producing errors.
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Page tags will show up in your tag cloud.
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Interacts with <a href="https://wordpress.org/plugins/q-and-a-focus-plus-faq/" title="Q & A Focus Plus FAQ" rel="ugc">Q & A Focus Plus FAQ</a> so that tags on FAQs are not broken if Easy Taxonomy Support is deactivated.
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Easy Taxonomy Support does not:
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Add the “post_tag” or any category taxonomies to registered custom post types. Custom post type support only works if you can already add tags to custom posts.
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Display categories or tags at the bottom of pages.
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Clean your house, mow your lawn, or improve your love life. If we can add these features in the future, we will.
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Easy Taxonomy Support

Use post tags and categories with pages and custom post types.

Naveen Gaur

TechWithNavi Pages Taxonomy Manager allows you to add dedicated Categories and Tags 
to WordPress Pages.
These taxonomies are separate from Posts, preventing admin menu 
conflicts and label duplication.
<h3>Features</h3>
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<li>Page Categories taxonomy</li>
<li>Page Tags taxonomy</li>
<li>Clean settings page</li>
<li>REST & Gutenberg support</li>
<li>Page-builder friendly</li>
<li>Lightweight and fast</li>
</ul>

TechWithNavi Pages Taxonomy Manager

Manage Categories and Tags for WordPress Pages.

Easy Taxonomy Support vs TechWithNavi Pages Taxonomy Manager