Black Studio TinyMCE Widget的作者是Black Studio,目前有700,000+个有效安装。已经Tested with 5.3.3版本的wordpress。
This plugin adds a new Visual Editor widget type that allows you to insert rich text and media objects in your sidebars with no hassle. With Black Studio TinyMCE Widget you will be able to edit your widgets in a WYSIWYG manner using the native WordPress TinyMCE editor, just like you do in posts and pages. And if you are a developer you may still switch back and forth from Visual to HTML mode.
For years the default WordPress text widget has been very basic and it required HTML knowledge to add formatting and images/media to the text. This plugin was born in 2011 to overcome these limitations. After a long time, in June 2017, version 4.8 of WordPress finally introduced a new text widget that included the ability to manage text widgets with the visual editor. The new widget available in WordPress core could now be used as a basic replacement of Black Studio TinyMCE Widget, but the plugin still offers some additional features, so it remains a must-have for advanced users.
Basic Features

Add rich text widgets to your sidebars and edit them using the TinyMCE visual editor
Switch between Visual mode and HTML mode (including Quicktags toolbar)
Insert images, videos, and other media from WordPress Media Library
Insert links to existing WordPress pages/posts or external resources
Support for shortcodes, smilies and embed in widget text (including preview)
Support for Customizer with live preview and quick edit
Support for widgets accessibility mode
Compatible with multi-site (WordPress networks)
Compatible with the most common multi-language plugins
Compatible with Page Builder plugin by SiteOrigin
Translations available in 20+ languages

Advanced Features
These features are what makes this plugin better than the WordPress (4.8+) native widget:

Full featured TinyMCE Visual Editor (the same you have for pages and posts)
Wide text area for an enhanced editing experience
Compatible with 3rd party TinyMCE customization plugins (TinyMCE Advanced, WP Edit, …)
Support for distraction-free (fullscreen) editing mode
Option to “Automatically add paragraphs” to widget text

About the plugin
The story of the plugin was featured in a talk at WordCamp Europe 2018 in Belgrade.
See the video Once upon a time, there was a plugin… on

Author’s web site
Plugin’s page
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Get involved

Developers can contribute to the source code on our GitHub repository.
Translators can contribute through the Official WordPress Translation platform.
Users can contribute by leaving a 5 stars review or making a donation.