This website contains links to software which is either no longer maintained or will be supported only until the end of 2019 (CKFinder 2). For the latest documentation about current CKSource projects, including software like CKEditor 4/CKEditor 5, CKFinder 3, Cloud Services, Letters, Accessibility Checker, please visit the new documentation website.
If you look for an information about very old versions of CKEditor, FCKeditor and CKFinder check also the CKEditor forum, which was closed in 2015. If not, please head to StackOverflow for support.
CKEditor is distributed under both Open Source (GPL, LGPL or MPL) and commercial licenses.
More information about CKEditor licensing options is available here: http://ckeditor.com/license. The full text of the CKSource Closed Distribution License Agreement is available here: http://cksource.com/cdl.
If you are not sure which licensing model is appropriate for your CKEditor usage, please use our contact form to describe your business model and needs.