MIT License

What you can do

• Use it in commercial products and SaaS
• Use it in internal and enterprise applications
• Self-host it — no cloud service or account required
• Modify the source and write your own plugins
• Bundle and redistribute it with your application
• No editor-load fees, seat limits or license keys

What you need to do

Include the copyright notice and the MIT license text in all copies or substantial portions of the software.

No warranty

The software is provided “as is”, without warranty of any kind. The authors are not liable for any claim or damages arising from its use.

Optional third-party libraries

SunEditor itself has no runtime dependencies. If you enable an optional integration, that library is covered by its own license:

• KaTeX (math) — MIT
• MathJax (math) — Apache-2.0
• CodeMirror (code view) — MIT

Full license text

This page is a plain-language summary, not legal advice. The license text below is what applies.

MIT License

Copyright (c) 2017-2025 Yi JiHong

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.