groupbwt

<p>Plugin imports posts from CSV file, allowing to connect CSV field with post field when creating a post.</p>
<ul>
<li>Custom Post Type support</li>
<li>Advanced Custom Fields (ACF) support</li>
</ul>
<h4>Available fields:</h4>
<ul>
<li>Post Content: (string) The post content. Default empty.</li>
<li>Post Title: (string) The post title. Default empty.</li>
<li>Comment Status: (string) Defines if the post can accept comments. Accepts ‘open’ or ‘closed’. Default is the value of ‘default_comment_status’ option.</li>
<li>Post Category: (string, comma separated) Post category names. Defaults to value of the ‘default_category’ option.</li>
<li>Featured Image: (string) The uri of the post thumbnail. Default is empty.</li>
<li>ID: (int) The post ID. If the ID does not exist, importer will try to create a new post with suggested ID.</li>
<li>Post Date: (string in format ‘yyyy-mm-dd hh:mm:ss’) Post date. Default is the current time.</li>
<li>Post Date GTM: (string in format ‘yyyy-mm-dd hh:mm:ss’) The date of the post in the GMT timezone. Default is the value of Post Date.</li>
<li>Post Content Filtered: (string) A filtered post content. Default is empty.</li>
<li>Post Excerpt: (string) The post excerpt. Default is empty.</li>
<li>Post Status: (string) The post status. Default is ‘published’.</li>
<li>Ping Status: (string) Defines if the post can accept pings. Accepts ‘open’ or ‘closed’. Default is the value of ‘default_ping_status’ option.</li>
<li>Post Password: (string) The password to access the post. Default is empty.</li>
<li>Slug: (string) The post name. Default is the sanitized post title when creating a new post.</li>
<li>To Ping: (string) Space or carriage return-separated list of URLs to ping. Default empty.</li>
<li>Pinged: (string) Space or carriage return-separated list of URLs that have been pinged. Default is empty.</li>
<li>Post Parent: (int) Set this for the post it belongs to, if any. Default is 0.</li>
<li>Menu Order:(int) The order number your want for the post to be displayed. Default is 0.</li>
<li>GUID: (string) Global Unique ID for referencing the post. Default is empty.</li>
<li>Taxonomy: (JSON) JSON of taxonomy terms keyed by their taxonomy name. Taxonomy must already exist. Default is empty.</li>
<li>Meta: (JSON) JSON of post meta values keyed by their post meta key. Default is empty.</li>
</ul>


CSV Posts Importer

Plugin imports posts from CSV file, allowing to connect CSV field with post field when creating a post.

WordPress.org

<p>Convert existing categories to tags or tags to categories, selectively.</p>


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.

CSV Posts Importer vs Categories to Tags Converter