foresthoffman

This plugin allows users to import Markdown files into posts. Prior to importing, settings for post status, post type, and post author can be set.
Post status settings:
<ol>
<li>Draft (default)</li>
<li>Publish</li>
<li>Private</li>
</ol>
Post type settings:
<ol>
<li>Post (default)</li>
<li>Page</li>
</ol>
Post author settings:
<ol>
<li>Current user (default)</li>
<li>All other users with the ability to edit posts</li>
</ol>
This plugin utilizes the <a href="http://parsedown.org" rel="nofollow ugc">Parsedown</a> PHP library by <a href="http://erusev.com" rel="nofollow ugc">Emanuil Rusev</a>, which is mostly compliant with the <a href="http://spec.commonmark.org/0.27/" rel="nofollow ugc">CommonMark</a> spec. It also extends up the Parsedown library, by allowing:
<ul>
<li>checkboxes; ‘[ ]’, ‘[]’, and ‘[x]’ are translated into unchecked/checked checkbox inputs</li>
</ul>

Parsedown Importer

An unofficial Parsedown importer for translating Markdown files into WordPress posts/pages.

WordPress.org

Convert existing categories to tags or tags to categories, selectively.

Categories to Tags Converter

Th plugin is old but still work perfectly. I have tried it on a modern install I have, with PHP7.

Works fine, with PHP 7 too

Convert existing categories to tags or tags to categories, selectively.

Parsedown Importer vs Categories to Tags Converter