Kirill

This plugin lets you paginate for your posts to your WordPress site.

Pure PHP Pagination

Ajax pagination for your posts at your awesome site!

thinh.pham

Help user to split WordPress post/page into multiple pages easier using WPEditor button. 
See more description here
<a href="https://thinhknowscode.com/how-to-separate-wordpress-single-post-into-multiple-pages/" rel="nofollow ugc">How to split WordPress post into multiple pages</a>
If the navigation section does not appear, this is probably because your theme is unable to handle the tag for splitting the page. So you need to add the following code in your single.php loop:
<pre><code><?php wp_link_pages(); ?>
</code></pre>

TKC Sliced Post Helper

Help user to split Wordpress post/page into multiple pages easier using WPEditor button.

Pure PHP Pagination vs TKC Sliced Post Helper