Extensions are the primary way to add functionality to ComfyUI. They can be custom nodes, custom nodes that render widgets (UIs made with javascript), ComfyUI shell UI enhancements, and more. This documentation covers everything you need to know about understanding, using, and developing extensions.
- Development Guide - How to develop extensions, including:
- Extension architecture and terminology
- How extensions load (backend vs frontend)
- Why extensions don't work in dev server
- Development workarounds and best practices
- Core Extensions Reference - Detailed reference for core extensions:
- Complete list of all core extensions
- Extension architecture principles
- Hook execution sequence
- Best practices for extension development
- Extension: Umbrella term for any code that extends ComfyUI
- Custom Nodes: Python backend nodes (a type of extension)
- JavaScript Extensions: Frontend UI enhancements
- Core Extensions: Built-in extensions bundled with ComfyUI
- Check the Development Guide for common issues
- Review Core Extensions for examples
- Visit the ComfyUI Discord for community support