Andrew Ozz

This plugin is intended for more advanced users that would like to change the default TinyMCE configuration in WordPress. 
It makes it very easy to add, remove or change all TinyMCE settings for the classic editor and for the classic block in the block editor.

Advanced TinyMCE Configuration

Set advanced TinyMCE options for the classic block and classic editor.

Danny van Kooten

ibericode

Harish Chouhan

<h4>WYSIWYG Widgets or rich text widgets</h4>
This plugin adds so called “Widget Blocks” to your website which you can easily display in your widget areas.
You can create or edit the widget blocks just like you would edit any post or page, with all the default WordPress editing functions enabled. This way, you can use the visual editor that comes with WordPress to format your widgets. You can even use media uploading to insert images and so forth.
Features:
<ul>
<li>Create beautiful widgets without having to write HTML code</li>
<li>Easily insert media into your widget content</li>
<li>Add headings, lists, blockquotes and other HTML elements to your widgets using the WordPress visual editor</li>
<li>Use WP Links dialog to easily link to any of your pages or posts from a widget</li>
<li>Use shortcodes inside your widgets</li>
<li>Translation ready</li>
</ul>
Translators
<ul>
<li>Dutch (nl_NL) – <a href="https://dannyvankooten.com/" rel="nofollow ugc">Danny van Kooten</a></li>
<li>Spanish (es_ES) – <a href="http://webhostinghub.com/" rel="nofollow ugc">Maria Ramos – WebHostingHub</a></li>
<li>Italian (it_IT) – <a href="http://www.dangelos.it/" rel="nofollow ugc">Tiziano D’Angelo – Studio D’Angelo</a></li>
<li>German (de_DE) – <a href="http://atelier.tag-eins.de/" rel="nofollow ugc">Christian Günther</a></li>
</ul>
If you have created your own language pack, or have an update of an existing one, you can send <a href="https://codex.wordpress.org/Translating_WordPress" rel="nofollow ugc">gettext PO and MO files</a> to me so that I can bundle it into WYSIWYG Widgets. You can <a href="https://plugins.svn.wordpress.org/wysiwyg-widgets/trunk/languages/wysiwyg-widgets.po" rel="nofollow ugc">download the latest PO file here</a>.
More information
<ul>
<li><a href="https://dannyvankooten.com/wordpress-plugins/wysiwyg-widgets/" rel="nofollow ugc">WYSIWYG Widgets</a></li>
<li>Other <a href="https://dannyvankooten.com/wordpress-plugins/" rel="nofollow ugc">WordPress plugins</a> by the same author</li>
</ul>

Widget Content Blocks

It does what it says and works well.
Great reusable widgets for multiple sidebars in WordPress.

Works well

This is such a great way to create widget content!

Works Wonderfully!

Edit widget content using the default WordPress visual editor and media uploading functionality. Create widgets like you would create posts or pages.

Advanced TinyMCE Configuration vs Widget Content Blocks