Software License Agreement
==========================

## Software License Agreement for CKEditor 4 LTS React component (5.0 and above)

**CKEditor 4 WYSIWYG editor component for React** – https://github.com/ckeditor/ckeditor4-react <br>
Copyright (c) 2003-2025, [CKSource](http://cksource.com) Holding sp. z o.o. All rights reserved.

CKEditor 4 LTS ("Long Term Support") is available under exclusive terms of the [Extended Support Model](https://ckeditor.com/ckeditor-4-support/). [Contact us](https://ckeditor.com/contact/) to obtain a commercial license.

## Software License Agreement for CKEditor 4 React component 4.3.0 and below

**CKEditor 4 WYSIWYG editor component for React** – https://github.com/ckeditor/ckeditor4-react <br>
Copyright (c) 2003-2025, [CKSource](http://cksource.com) Holding sp. z o.o. All rights reserved.

Licensed under the terms of any of the following licenses at your
choice:

- GNU General Public License Version 2 or later (the "GPL")
  http://www.gnu.org/licenses/gpl.html

- GNU Lesser General Public License Version 2.1 or later (the "LGPL")
  http://www.gnu.org/licenses/lgpl.html

- Mozilla Public License Version 1.1 or later (the "MPL")
  http://www.mozilla.org/MPL/MPL-1.1.html

Sources of Intellectual Property Included in CKEditor
-----------------------------------------------------

Where not otherwise indicated, all CKEditor content is authored by CKSource engineers and consists of CKSource-owned intellectual property. In some specific instances, CKEditor will incorporate work done by developers outside of CKSource with their express permission.

The following libraries are included in CKEditor 4 WYSIWYG editor component for React under the [MIT license](https://opensource.org/licenses/MIT):
- load-script
- prop-types (c) 2013-present, Facebook, Inc.

The following libraries are included in CKEditor 4 WYSIWYG editor component for React under the [0BSD license](https://opensource.org/licenses/0BSD):
- tslib (c) Microsoft Corporation

Trademarks
----------

**CKEditor** is a trademark of [CKSource](http://cksource.com) Holding sp. z o.o. All other brand and product names are trademarks, registered trademarks or service marks of their respective holders.