Software License Agreement

We are proud to be Open Source.

CKEditor 5 is licensed under the terms of GNU General Public License Version 2 or later.

If you are running an Open Source project with an OSS license incompatible with GPL please contact us and we will be happy to support your project with a CKEditor 5 license.

CKEditor 4 is licensed under the terms of any of the following licenses at your choice:

You are not required to, but if you want to explicitly declare the license you have chosen to be bound to when using, reproducing, modifying and distributing this software, just include a text file titled "legal.txt" in your version of this software, indicating your license choice. In any case, your choice will not restrict any recipient of your version of this software to use, reproduce, modify and distribute this software under any of the above licenses.

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.

CKEditor is a trademark of CKSource sp. z o.o. sp.k.. All other brand and product names are trademarks, registered trademarks or service marks of their respective holders.

Software License Agreement

CKEditor 5

CKEditor 4

Sources of Intellectual Property Included in CKEditor

Trademarks