Keep CKEditor 4
safe and secure

CKEditor 4 reached its End-of-Life with no new features, updates, security patches or bug fixes. Don’t risk security breaks or unsupported software, talk to us about an Extended Support Model.

Extended Support Model Package

This limited-time-only package guarantees that your editor remains secure, with
uninterrupted access to all functionality until December 2026.

standard inclusion

Security Vulnerability Assurance

Ensures security fixes are provided for any CKEditor 4 bugs which threaten the security of your application.

optional extra

Third-party API Changes Assurance

CKSource resolves* any critical / high severity issues in CKEditor 4 caused by changes in a third-party apps (e.g. browser, MS Word) that CKEditor 4 depends on for its functionality.

* Time limitations apply

optional extra

Standard Support

Access CKSource Customer Support team for ongoing support requests as per your standard contract terms.

What's the alternative? Migrate to CKEditor 5

Its modular architecture, content editing model, and performance improvements make it the perfect
choice for developers who need a powerful and customizable rich text editor framework.

Plugin-based architecture

Everything is a plugin - even a basic feature like typing. So you can customize, remove or replace whatever plugins you desire.

Markdown output

Use the data processor to produce custom output instead of HTML - for example Markdown, JSON or XML.

Theme customization

Easily adjust the theme with CSS variables. You can even build your own third-party UI, for example in Bootstrap or React.


Native integrations with Angular,
React and are available and it's compatible with Electron plus Android and iOS devices.

Ready to purchase an Extended Support Model
for your CKEditor 4 installation?

Frequently asked questions

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The CKEditor Long Term Support (LTS) Package is the version of CKEditor 4 exclusively for people who have purchased our Extended Support Model Package. Customers who buy the Extended Support Model get a new license key for activating the LTS Package.

The LTS Package is the only version of CKEditor 4 that has access to essential security fixes. You can download the latest CKEditor 4 LTS Package version here.

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You now need to upgrade your editor configuration. Download the CKEditor 4 Long Term Support Package and add the new license key from your CKEditor Ecosystem Dashboard.

Not sure where to look? See our guide to finding your license key.

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When a new CKEditor 4 LTS version is released, an email notification is sent to the email addresses saved in your CKEditor Ecosystem Dashboard.

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Beyond the EOL in June 2023, there are no new features, plugins, enhancements, bug fixes or security updates.

To learn more, read this article that details more about end-of-life.

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It may depend on the specific terms of your existing contract, so please contact us at to talk about your case.

Please note: Different from CKEditor 4, the open source license for CKEditor 5 is GPL v2+. Free-of-charge use of CKEditor 5 is allowed in compatible open source projects, or under our Free for Open Source Policy.

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Yes, you can continue using CKEditor 4. But you need to be aware of the security vulnerabilities that decision may open for your application.

To help support your project beyond June 2023, there’s an Extended Support Model available for a limited period, that (amongst other support benefits) ensures a security fix will be provided for any CKEditor 4 bugs that threatens the security of the application where it's implemented.

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Having problems upgrading on time? Chat to our sales team about the paid support options you have available.

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