jojaba

This plugin replaces the word count info in bottom of the edit post window by the characters/words count (on the fly). Additionnaly, you can limit the characters/words count for defined user roles.
Here’s the list of the settings (see screenshots for further infos):
<ul>
<li>Enable or disable characters/words count limit.</li>
<li>Max characters and words count setting</li>
<li>Warning characters and words count setting (the count before max count when the warning is fired)</li>
<li>Output Format. You can define how you would like to see the output displayed using different placeholders : <code>#chars</code> (the character count that has been typed), <code>#words</code> (The number of words), <code>#maxChars</code> (the max characters allowed), <code>#leftChars</code> (the characters count left),<code>#maxWords</code> (the max words allowed), <code>#leftWords</code> (the words count left).</li>
<li>Choose what user role should be limited. Default set to contributor role.</li>
<li>Choose the post types that should be limited. Default set to post.</li>
<li>Set customised messages for warning or for contributor submission.</li>
</ul>
Availabe languages : english and french.

WordPress Word Count and Limit

Counts dynamically the characters/words in edit post window and limit the characters/words count if needed for one or more user roles.

Tom Anbinder

Pablo Pacheco

WPFactory

Kousik Mukherjee

Omar AlDabbas

Algoritmika

If you are using pretty permalinks, you may have noticed WordPress sanitizes it removing accents and some special characters.
However some of these characters are not sanitized by default, meaning they can be added to some of your post URLs, like a trademark symbol(®), a copyright symbol(©) or even a <a href="https://www.utf8icons.com/" rel="nofollow ugc">UTF-8 symbol</a> like ⛓.
Although it may not hurt you at first, it may let users confused and it can cause some problems when interacting with some third party API that is not prepared to read such characters.
This plugin Removes special characters from permalinks when the post is created or updated.
<h3>How to use it?</h3>
All you have to do is saving/updating your post and you will notice special characters will be swiped out from the permalink.
<h3>Pro Version</h3>
Enjoying the free version of this plugin?
We have a Pro version that allows removing characters from all permalinks of your site with just one click, including posts, pages and custom post types. 
We also offer support if you have some sort of problem.
<a href="https://wpfactory.com/item/remove-special-characters-from-permalinks-wordpress-plugin/" rel="nofollow ugc">Update to PRO</a> for a better plugin and helping maintaining the development of this plugin

Remove Special Characters From Permalinks

In french, we use unbreakable space and it’s not managed by WordPress. So strange code shows up in permalink, breaking sharing on Facebook by example. This plugin fixes this problem. So 5 stars.

Update: I downgrade the rating to 2 stars. There is a conflict with Markdwon Module in Jetpack and there was no update made. Too bad.

Update : after contact through Facebook page, the problem has been fixed. Hooray. So back to 5 stars.

Works great

Removes special characters from permalinks

WordPress Word Count and Limit vs Remove Special Characters From Permalinks