feedmeastraycat

Note: This plugin still works but it doesn’t really contain any major features that the native Text widget is missing. The plugin is no longer in active developement.
This plugin adds a rich text widget where the content is edited using the standard WordPress visual editor which most users already are familiar with. 
It uses the WP core function wp_editor() without adding a custom post type post for each widget making the widget quicker and simpler to edit.
Feel free to help with developement or issue reporting on <a href="https://github.com/feedmeastraycat/wp-editor-widget" rel="nofollow ugc">Github</a>!
<h4>Languages</h4>
<ul>
<li>English</li>
<li>Swedish</li>
<li>German</li>
<li>Danish</li>
<li><a href="https://translate.wordpress.org/projects/wp-plugins/wp-editor-widget" rel="nofollow ugc">More translations</a></li>
</ul>

WP Editor Widget

I used it to add client instructions to an admin page. This makes adding screenshots and video quite easy.



Works Perfectly

WP Editor Widget adds a rich text widget where the content is edited using the standard WordPress visual editor.

Ju'Z[ed]

JuZ Rich Text Extender allows developers to register custom inline format buttons in the Gutenberg (block editor) toolbar. Each button applies a specific HTML inline tag with an optional CSS class to the selected text.
The plugin includes a built-in nesting validation system: buttons are automatically disabled when their use would produce invalid HTML nesting (e.g. <code><a></code> inside <code><a></code>). When a format is already active, its button remains enabled so it can always be toggled off.
Key features:
<ul>
<li>Register custom inline formats (tag + CSS class) via a WordPress filter</li>
<li><code>tagName</code> defaults to <code>span</code>, which is strongly recommended for compatibility</li>
<li>Smart nesting validation against the full active tag stack (for non-span tags)</li>
<li>Buttons are visually disabled when nesting is not allowed</li>
<li>Exhaustive inline tag ruleset (<code>span</code>, <code>a</code>, <code>strong</code>, <code>em</code>, <code>mark</code>, <code>code</code>, <code>u</code>, <code>s</code>, <code>i</code>, <code>b</code>, <code>q</code>, <code>cite</code>, <code>abbr</code>, <code>small</code>, <code>sub</code>, <code>sup</code>)</li>
<li>Inline tag rules are filterable for full customisation by themes or other plugins</li>
</ul>
For developers:
Formats and inline tag rules are both exposed via WordPress filters, making the plugin fully extensible without modifying core files.

JuZ Rich Text Extender

Extends the Gutenberg block editor toolbar with custom inline format buttons, with smart nesting validation based on HTML spec rules.

WP Editor Widget vs JuZ Rich Text Extender