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ckeditor5-premium-features

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Premium features for CKEditor 5.

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Software License Agreement ========================== **CKEditor&nbsp;5 Premium features** (https://ckeditor.com/ckeditor-5/)<br> Copyright (c) 2003–2026, [CKSource Holding sp. z o.o.](https://cksource.com) All rights reserved. CKEditor&nbsp;5 Premium features is licensed under a commercial license and is protected by copyright law. For more information, see: [https://ckeditor.com/pricing](https://ckeditor.com/pricing). Sources of Intellectual Property Included in CKEditor&nbsp;5 ------------------------------------------------------------ Where not otherwise indicated, all CKEditor&nbsp;5 content is authored by CKSource engineers and consists of CKSource-owned intellectual property. The following libraries are included in CKEditor&nbsp;5 under the [BSD-2-Clause license](https://opensource.org/licenses/BSD-2-Clause): * domhandler - Copyright (c) Felix Böhm. * domutils - Copyright (c) Felix Böhm. The following libraries are included in CKEditor&nbsp;5 under the [BSD-3-Clause license](https://opensource.org/licenses/BSD-3-Clause): * diff - Copyright (c) 2009-2015, Kevin Decker <kpdecker@gmail.com>. * protobufjs - Copyright (c) 2016, Daniel Wirtz All rights reserved. The following libraries are included in CKEditor&nbsp;5 under the [MIT license](https://opensource.org/licenses/MIT): * @codemirror/autocomplete - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @codemirror/commands - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @codemirror/lang-html - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @codemirror/lang-markdown - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @codemirror/language - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @codemirror/state - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @codemirror/theme-one-dark - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @codemirror/view - Copyright (C) 2018-2021 by Marijn Haverbeke <marijn@haverbeke.berlin> and others. * @types/luxon - Copyright (c) Microsoft Corporation. * @uploadcare/file-uploader - Copyright (c) 2025 Uploadcare (hello@uploadcare.com). All rights reserved. * @uploadcare/upload-client - Copyright (c) 2019 Uploadcare Inc. * dom-serializer - Copyright (c) 2014 The cheeriojs contributors. * es-toolkit - Copyright (c) 2024 Viva Republica, Inc and Copyright OpenJS Foundation and other contributors. * eventsource-parser - Copyright (c) 2025 Espen Hovlandsdal <espen@hovlandsdal.com>. * htmlparser2 - Copyright 2010, 2011, Chris Winberry <chris@winberry.net>. All rights reserved. * luxon - Copyright 2019 JS Foundation and other contributors. * morphdom - Copyright (c) Patrick Steele-Idem <pnidem@gmail.com> (psteeleidem.com). * rehype-sanitize - Copyright (c) 2016 Titus Wormer <tituswormer@gmail.com>. * socket.io-client - Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors. * socket.io-parser - Copyright (c) 2014-present Guillermo Rauch and Socket.IO contributors. * specificity - Copyright (c) 2016 Keegan Street and others. * url-parse - Copyright (c) 2015 Unshift.io, Arnout Kazemier, the Contributors. * uuid - Copyright (c) 2010-2020 Robert Kieffer and other contributors. Trademarks ---------- **CKEditor** is a trademark of [CKSource Holding sp. z o.o.](https://cksource.com) All other brand and product names are trademarks, registered trademarks or service marks of their respective holders.