CkEditor 4

What is CkEditor 4?

WYSIWYG Smart HTML Editor

Approved by millions. Fully customizable. Rich text editor Number 1 with more features.

Full of features:

• Paste from Word, Excel and Google Docs. Excellent tables support column resizing, selecting rows, and columns.
• Media embedding (insert videos, tweets, Instagram posts, and more), widgets, code snippets, math formulas.
• Autocomplete, @ mentions, emoji and plugins.
• The in-line and iframe user interface, with automatic growth, maximizes the mode for recording without distractions. Read-only mode.
• Various style and formatting plugins, copy formatting feature.
• Templates and placeholders to enter dynamic values or reuse blocks of text.
• All-purpose image plugins: images with captions, classic resizable images, responsive images. Upload images with drag and drop or paste an image from the clipboard.
• Free HTML edition and source mode. Advanced Content Filter (FCA), with the ability to allow only selected elements, attributes, or classes or accept any HTML.
• Optional add-ons: Spelling Checker and CKFinder, a file manager and loader with an image editor.

Easy to use

• Learn how to start a WYSIWYG HTML editor in a few minutes with an API and simple documentation.
• Quickly create your custom editor thanks to the online builder with over 400 plugins.
• More than 240 configuration options allow you to adjust every little detail without writing any code.
• Easily adjust the toolbar with the toolbar configurator.

Connectable and customizable

• The plug-in and event-based architecture allows you to enhance ckeditor 4 functionality without having to fork.
• Write your own plugins by following simple tutorials. The well-documented CKEditor 4 API and extensive documentation full of examples and code snippets will also help you.
• Learn from the source code of the plug-ins included in CKEditor 4. It's open source!

WYSIWYG Corporate HTML Editor

• CKEditor 4 is the most stable and reliable solution on the market since its launch in 2012. It has been actively improved since then.
• Broad browser support, including older browsers.
• Exceptional security: As an open source application with many enterprise customers, CKEditor 4 is constantly checked by combsters, security scanners, and source code analysis tools.
• Long-term support (SLP) by 2023.

Great accessibility

• Accessibility Guidelines for AA Web Content and in compliance with Section 508.
• Excellent keyboard support.
• High contrast support and support for screen readers like JAWS.
• Optional accessibility checker to analyze whether user-created content is accessible.

Truly global

• 70 language versions.
• User interface that supports LTR and RTL (for example, Arabic or Hebrew).
• Dedicated plug-ins to define the direction of the text (mixing RTL and LTR content) and for the language of the text part (for example, quoting a German phrase in an English phrase).
• Great composition (IME) support for languages such as Chinese, Japanese, and Korean.

Mathematical equations and spell checking

• MathType equation editor for easy creation of scientific documents.
• Type or write by hand - the one that best serves you.
• Create your own keyboard shortcuts and customize your toolbars.
• Edit your formulas in keyboard-only mode.
• Easy, modern and customizable review
• Spelling and grammar errors underlined anywhere.
• Badge without distractions with access to review suggestions.
• Spelling and grammar suggestions available when hovering, no click.

Spreadsheets

Create intelligent data-driven documents where you can sort columns, use formulas, style data, and more.

• Feature of spreadsheets available directly in your document.
• Perfect for the financial, technical and scientific sectors.
• Help your users increase productivity (no Excel required)!

Amazing community and support

• More than 21,000 questions about StackOverflow related to CKEditor 4. If, by chance, you don't find the answer in the documentation, it's probably already in StackOverflow.
• Over 25 million downloads on CKEditor 4 with a user base of more than hundreds of millions. With such a large user base, many reviews are valuable, error reports, and resource requests. This helps to evolve and improve every day.
• Over 300 community plugins and over 100 official plugins in the add-on repository.
• More than 17,000 confirmed on GitHub. With this CKEditor 4 gets better every day.

System requirements

For every 250 concurrent users, CKEditor Cloud Services On-Premises requires an additional 1 Docker container with a minimum limit of 500 MB of RAM.

1 Docker container and at least 500 MB of RAM support up to 250 concurrent users.

2 Docker containers and at least 1 GB of RAM support up to 500 concurrent users.

4 Docker containers and at least 2 GB of RAM support up to 1,000 concurrent users.

8 Docker containers and at least 4 GB of RAM support up to 2,000 concurrent users.

16 Docker containers and at least 8 GB of RAM support up to 4,000 concurrent users.