Custom Nodes - ComfyUI

Custom Nodes extend ComfyUI with new server-side behavior, user-interface features, and integrations. Choose a path based on what you are trying to do.

Build Custom Nodes

Learn the client-server model, node categories, Python backend, and JavaScript frontend before building your node.

Package & Publish

Prepare a node package, publish it to the Comfy Registry, and manage versions and releases.

Choose a starting point

New to custom nodes: start with Custom Nodes Overview.
Building the backend: see Python (Backend).
Extending the UI: see JavaScript (UI).
Publishing a package: start with the Registry Overview.