Embeddable editors

Embeddable code editors, block-style editors, and rich text (WYSIWYG) editors you can use in web apps.

Code editors

Embeddable code editors with syntax highlighting, often used in docs, playgrounds, or admin tools.

• Monaco Editor — The same editor that powers VS Code. Full-featured, heavy.
• CodeMirror — Versatile code editor for the web. Modular and widely used.
• ACE Editor — High-performance code editor. Mature and customizable.
• CodeFlask.js — Lightweight code editor for simple embeds.
• CodeJar — Minimal, dependency-free code editor (~1 KB).

Block editors

Block-based editors (blocks like paragraph, heading, list, image). Good for structured content and modern CMS UIs.

• Editor.js — Block-styled editor with clean JSON output. Free and open source.
• MediumEditor — Inline editor with a simple toolbar. No blocks, minimal setup.

Rich text (WYSIWYG) editors

What-you-see-is-what-you-get editors for formatted text and HTML.

• TinyMCE — Trusted WYSIWYG editor. Free tier and commercial options.
• Quill — Powerful rich text editor with a modular API.
• Slate — Framework for building custom rich text editors (React).
• Draft.js — Rich text editor framework for React by Meta.
• CKEditor 5 — Modern WYSIWYG editing (open source and commercial).
• Froala — Commercial WYSIWYG editor with many features.
• Summernote — Simple WYSIWYG editor built on Bootstrap.

Markdown editors

Editors for Markdown with preview, often used in comment forms or docs.

• EasyMDE — Simple, embeddable Markdown editor (maintained fork of SimpleMDE).
• SimpleMDE — Original embeddable Markdown editor; consider EasyMDE for updates.
• Editor (lepture) — Markdown editor with live preview (demo).