createaccord

You can import a CSV file to populate custom fields associated with custom post types and custom posts.
<ul>
<li>
Be sure to back up your data before using this feature.
</li>
<li>
We do not support (and cannot fully support) the creation of custom posts or display of data, so please use another plugin yourself. (We provide some shortcodes that support display.)
</li>
<li>
Custom fields do not disappear when you delete a custom post. They must be deleted from the database. (Use a plugin or database management tool to delete unwanted data.)
</li>
<li>
This plugin is not designed to handle large amounts of items (e.g. 10,000 items).
</li>
</ul>
For more information, see the documentation that came with the plugin.
<h3>Arbitrary section</h3>

CSVDataImport CustomPost

This is a plugin with simple and easy functions that allows you to import CSV data such as products and use it in WordPress.

Duke

Shambix

thaikolja

akforsyt

This plugin allows you to export your posts to CSV or XLS file, through a simple link/button, from either backend or frontend. 
Make sure you are using PHP 7.3+, if you see any errors, older versions will not be supported anymore. The plugin has been tested up to PHP 8.1.
Supports
<ul>
<li>any custom post type</li>
<li>custom post status</li>
<li>custom taxonomies</li>
<li>custom fields</li>
<li>WooCommerce products, orders, status, categories and fields</li>
<li>export only current user posts</li>
<li>export specific user ID posts</li>
<li>export specific post IDs</li>
</ul>
You can set the default post type, with its taxonomies and custom fields, that you wish to export, from the Settings page.
After that, anytime you will use the urls <code>https://yoursite.com/?export=csv</code> for a CSV file, or <code>https://yoursite.com/?export=xls</code>, you will get that post type data.
“You must choose the post type and save the settings before you can see the taxonomies or custom fields for a custom post type. Once the page reloads, you will see the connected taxonomies and custom fields for the post type.”
If you want to export from a different post type than the one saved in these settings, also from frontend, use the url <code>https://yoursite.com/?export=csv&post_type=your_post_type_slug</code> for a CSV file, or <code>https://yoursite.com/?export=xls&post_type=your_post_type_slug</code> to get a XLS.
Please check the <a href="https://wordpress.org/plugins/simple-csv-xls-exporter/#faq" rel="ugc">Plugin’s FAQ</a> for all possible options and available custom parameters you can use.
When opening the exported xls, Excel will prompt the user with a warning, but the file is perfectly fine and can then be opened. Unfortunately this can’t be avoided, <a href="http://blogs.msdn.com/b/vsofficedeveloper/archive/2008/03/11/excel-2007-extension-warning.aspx" rel="nofollow ugc">read more here</a>.
<h4>Questions?</h4>
Check the FAQ before opening new threads in the forum!
<blockquote>
Contact me if you want a custom version of the plugin, for a fee (contact form at <a href="http://www.shambix.com" rel="nofollow ugc">shambix.com</a>).
</blockquote>
<ul>
<li><a href="https://github.com/Jany-M/simple-csv-xls-exporter" rel="nofollow ugc">Current Plugin on Github</a></li>
</ul>
<h4>Credits</h4>
<ul>
<li><a href="https://github.com/mediebruket/custom-csv-exporter" rel="nofollow ugc">Last forked plugin’s version</a></li>
<li><a href="https://github.com/ethanhinson/custom-csv-exporter" rel="nofollow ugc">Original plugin’s version</a></li>
</ul>

Simple CSV/XLS Exporter

Simple CSV/XLS Exporter does exactly what it is supposed to do: exporting specified content to CSV or XLS files. Nicely embedded into the dashboard, works right out of the box, no annoying limitations to force users to buy any premium version. I couldn't find any negative thing.

Clean, efficient, reliable

WP 6.0 + theme 2021 + no plugins + PHP 7.4

Not bad but it does not work with clear WP installation.

Export any content to CSV or XLS, through a link/button, from backend / frontend. Supports custom post types, WooCommerce, custom taxonomies, post sta …

CSVDataImport CustomPost vs Simple CSV/XLS Exporter