CKEditor 5 — Customizable Rich Text Editor Framework

Introduction

CKEditor 5 is a complete rewrite of the long-running CKEditor project, built from scratch with a modern MVC architecture. It provides a framework for creating rich text editing experiences ranging from simple inline editors to full document processors. The plugin system lets developers include only the features they need.

What CKEditor 5 Does

• Provides a rich text editing surface with formatting, lists, tables, images, and media embeds
• Supports real-time collaborative editing with operational transformation
• Offers multiple editor types: classic, inline, balloon, decoupled, and multi-root
• Handles complex content like nested tables, code blocks, and mathematical formulas
• Outputs clean HTML or a custom document model for structured content

Architecture Overview

CKEditor 5 uses a custom data model separate from the DOM. Edits are expressed as operations on this model, which a rendering engine then maps to the view layer. This model-view separation enables features like collaborative editing, undo/redo with full operation history, and consistent cross-browser behavior. Plugins register commands, converters, and UI components through a dependency injection system.

Self-Hosting & Configuration

• Install the base package and desired feature plugins from npm
• Use the online builder at ckeditor.com to select features and download a custom build
• Configure toolbar items, plugins, and language in the editor config object
• Integrate with React, Angular, or Vue using official wrapper packages
• Self-host all assets with no external CDN dependency

Key Features

• Modular plugin architecture where every feature is an independent package
• Real-time collaboration support with track changes, comments, and revision history
• Paste from Word and Google Docs with formatting preserved
• Accessibility compliant with WCAG 2.1 AA standards
• Autoformat shortcuts for Markdown-like input (e.g., ## for headings)

Comparison with Similar Tools

• TinyMCE — Traditional WYSIWYG editor; CKEditor 5 has a modern MVC model and deeper plugin API
• Tiptap — Built on ProseMirror with a Vue/React focus; CKEditor 5 offers a self-contained framework with built-in collaboration
• Quill — Lightweight editor with a flat document model; CKEditor 5 handles complex nested structures like tables in tables
• Lexical — Meta's extensible editor framework; CKEditor 5 provides more out-of-the-box features for enterprise use cases

FAQ

Q: Is CKEditor 5 free to use? A: The open-source edition is free under GPL 2+. Premium features like real-time collaboration and export to PDF require a commercial license.

Q: Can I use it with React? A: Yes. The official @ckeditor/ckeditor5-react package provides a React component wrapper.

Q: How do I add a custom plugin? A: Create a class extending Plugin, define commands and converters, and register it in the editor config's plugins array.

Q: Does it support Markdown input and output? A: Yes. The Markdown plugin enables Markdown as both an input shortcut and an output format.

Sources

• https://github.com/ckeditor/ckeditor5
• https://ckeditor.com/docs/ckeditor5/latest/