The Suneditor is a lightweight, flexible, customizable WYSIWYG text editor for your web applications. It has support to Embed images, Videos, Image resizing and rotation, Upload images to the server, Image gallery, Tables and lot more. It has support to use CodeMirror and KaTeX. 

SunEditor - Pure Javascript based WYSIWYG html editor, with no dependencies

A JS library for building WYSIWYG editors for HTML content. It is one of a collection of libraries designed for building tools that make it easier to edit HTML content. It is framework agnostic, The library doesn't use any JavaScript frameworks (no JQuery) but plays nicely with any of them. 

ContentTools - A beautiful & small content editor

WYMeditor is a web-based WYSIWYM (What You See Is What You Mean) XHTML editor (not WYSIWYG). WYMeditor has been created to generate perfectly structured XHTML strict code, to conform to the W3C XHTML specifications and to facilitate further processing by modern applications.
	Its features include:
 <ul>
 <li>XHTML strict + CSS compliant</li>
 <li>No font or text formatting, sizes or colors - WYMeditor is CSS-based</li>
 <li>Designed to be easy to integrate into your application</li>
 <li>No installation needed - this is 100% Javascript code - no plugin, no extension
 <li>Will remain as simple as possible</li>
 <li>We focus on well-tested code, stability and usability before adding new features</li>
 <li>Image, link, table support</li>
 <li>Skins support via CSS</li>
 <li>Internationalization</li>
 <li>APIs, plugins support
 </ul>

 Supported browsers:
 <ul>
 <li>Gecko-based browsers (Firefox 2.0+, SeaMonkey, Galeon, Epiphany, ...)</li>
 <li>Microsoft Internet Explorer 6, 7 and 8</li>
 <li>Opera 9.5+</li>
 <li>Safari 3.1+</li>
 <li>Google Chrome</li>
 </ul>

WYMeditor is a web-based WYSIWYM (What You See Is What You Mean) XHTML editor (not WYSIWYG). WYMeditor has been created to generate perfectly structured XHTML strict code, to conform to the W3C XHTML specifications and to facilitate further processing by modern applications.

Wymeditor - Web-based XHTML editor

Super simple WYSIWYG Editor. Summernote is a JavaScript library that helps you create WYSIWYG editors online. It saves images directly in the content of the field using base64 encoding, so you don't need to implement image handling at all. It also supports paste images from clipboard, Interactive WYSIWYG editing, Handy integration with server and lot more.

Summernote - Super simple WYSIWYG editor

Medium.com WYSIWYG editor clone. Uses contenteditable API to implement a rich text solution. MediumEditor has been written using vanilla JavaScript, no additional frameworks required.

Medium Editor - Medium.com WYSIWYG editor clone

Etch is a content editor built on Backbone.js and is designed to be easily plugged into your Backbone app. It utilizes ContentEditable to edit content in place.

Etch.JS - A Content Editor

NicEdit is a Lightweight, Cross Platform, Inline Content Editor to allow easy editing of web site content on the fly in the browser. NicEdit Javascript integrates into any site in seconds to make any element/div editable or convert standard textareas to rich text editing.

NiceEdit - Lightweight, Cross Platform, Inline Content Editor

Squire is an HTML5 rich text editor, which provides powerful cross-browser normalisation, whilst being supremely lightweight and flexible. Squire was written as a component for writing documents (emails, essays, etc.), not doing wysiwyg websites.

Squire - HTML5 rich text editor

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