The GPL is a "copyleft" license. If you use CKEditor 5 in a proprietary software product that you sell or restrict, you cannot use the GPL version. You must purchase a commercial license. The Commercial Rule
| Error | Cause & Solution | | :--- | :--- | | | This often occurs when a license key is used with an incompatible editor distribution. For example, a trial key might be used with a self-hosted setup, or there's a mismatch between the channels (cloud vs. npm). Ensure you are using the correct key for your specific distribution method. | | license-key-domain-limit | Your commercial license key is tied to a specific set of domain names. This error means you are trying to use the key on a domain that is not on your allowed list. Log in to your dashboard to manage the domains associated with your license key. | | license-key-plugin-not-allowed | This happens when your license key does not include permissions for one of the premium plugins you are trying to load (e.g., FormatPainter ). Double-check that the premium feature is included in your plan or that you are using the correct key for the features you've licensed. | | license-key-missing or invalid-license-key | The simplest error to fix. It means the licenseKey property is missing from your configuration, or the provided key is an empty string or an invalid format. Ensure you have included the property with a valid commercial key or the 'GPL' string. |
Which (React, Angular, Vue, or Vanilla JS) are you building with? Share public link ckeditor 5 license key
If your license key expires or your subscription lapses, the editor may display a visual warning (such as a "Missing License Key" watermark) to end-users, or premium plugins (like PDF export or collaboration) will stop functioning. The core open-source editing features will usually continue to work, but you will be out of legal compliance if your project is proprietary. Can I hide my license key in the frontend code?
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. The GPL is a "copyleft" license
Integration with OpenAI or custom LLMs to rewrite, summarize, or translate text directly within the editor. 4. How to Get a CKEditor 5 License Key To obtain a license key, follow these steps:
import ExportPdf from '@ckeditor/ckeditor5-export-pdf/src/exportpdf'; The Commercial Rule | Error | Cause &
For React applications using the official @ckeditor/ckeditor5-react component:
If you omit the licenseKey property or use an invalid key: