JavaScript-based HTML editors

free and open-source text and source code editor

Modular JavaScript framework designed to ease the rapid development of cross-platform, JavaScript/Ajax-based applications and web sites.

CKEditor (formerly known as FCKeditor) is a WYSIWYG rich text editor which enables writing content directly inside of web pages or online applications. Its core code is written in JavaScript and it is developed by CKSource. CKEditor is available under open source and commercial licenses.

TinyMCE is an online rich-text editor released as open-source software under the GNU General Public License version 2 or later. TinyMCE uses a freemium business model that includes a free core editor and paid plans with advanced features. It converts HTML textarea fields, or other designated HTML elements, into editor instances.

CodeMirror is a JavaScript component that provides a code editor in the browser. It has a rich programming API and a focus on extensibility.

free source code editor written in JavaScript