The CKEditor 5 license key is more than just a string—it's your legal permission slip to build profitable, closed-source applications with one of the best WYSIWYG editors on the market.
Remember the golden rule:
If you are still unsure, consult with a lawyer, but CKEditor’s dual licensing is standard in the industry (similar to QT, MySQL, or MongoDB). Ignoring the license key requirement can lead to costly legal issues down the road.
Now that you understand the what, why, and how of the CKEditor 5 license key, you can confidently integrate the editor into your next project—legally and professionally.
Disclaimer: This article is for informational purposes. Licensing terms and pricing change. Always refer to the official CKEditor website for the most current information.
CKEditor 5 requires a license key to activate the editor and its premium features. While the core editor is available under the GPL open-source license, a license key is mandatory for commercial use and to unlock specialized plugins like real-time collaboration or export-to-PDF. 🔑 Types of License Keys GPL License Key: Use the string 'GPL' in your configuration. For projects compliant with the GPL v2+ license. Includes basic editor features without premium plugins. Trial License Key: Valid for 14 days. Grants full access to premium features for testing. Obtained via the CKEditor Ecosystem Dashboard. Commercial/LTS License Key: Required for private or commercial software. Provided upon purchase or agreement with CKSource. Includes Long Term Support (LTS) and security updates. 🛠️ Where to Apply the Key ckeditor 5 license key
The license key is added directly to your editor configuration object under the licenseKey property. JavaScript Implementation javascript
ClassicEditor .create( document.querySelector( '#editor' ), licenseKey: ' Use code with caution. Copied to clipboard Integration Examples
Strapi: Enter the key in the plugin configuration settings after installing the Official Strapi Integration.
Drupal: Add the key to the General Settings of the CKEditor 5 Premium Features module. Common Issues & Validation
"Missing license key" Warning: This appears in the console if the licenseKey property is undefined. The CKEditor 5 license key is more than
Expired Trial: Premium features will stop working once the 14-day trial period ends.
Key Mismatch: Ensure the key matches the specific version of the editor (e.g., a v4 key will not work for v5). To help you get the right key, could you tell me: Is your project open-source (GPL) or commercial?
Do you need premium features (Track Changes, Real-time Collaboration, Export to Word)?
Which framework are you using (React, Angular, Strapi, or vanilla JS)?
I can provide the specific code snippet for your environment. License key and activation | CKEditor 4 Documentation If you are still unsure, consult with a
A: Yes. When you sign up for a commercial account, CKSource provides a 14-day or 30-day trial key. During this trial, all premium features are unlocked with a visible watermark. This is ideal for development and testing.
Premium features require both the feature’s plugin and a valid license key:
import ExportPdf from '@ckeditor/ckeditor5-export-pdf/src/exportpdf';
ClassicEditor .create(document.querySelector('#editor'), ', 'bold', 'italic' ] )
Note: If you attempt to use a premium plugin without a valid license key, the editor will throw a licensing error and the feature will not work.
import ClassicEditor from 'ckeditor5'; import 'ckeditor5/ckeditor5.css';
ClassicEditor .create(document.querySelector('#editor'), licenseKey: 'YOUR_LICENSE_KEY_HERE' ) .catch(error => console.error(error));