Key Features
Node-Based Workflow
Visual graph editor — drag, connect, and configure nodes to build any image pipeline. Save and share workflows as JSON files.
Model Support
- Stable Diffusion 1.5, 2.1, XL, 3.0
- Flux (Dev, Schnell)
- ControlNet, IP-Adapter, T2I-Adapter
- LoRA, LyCORIS, Hypernetworks
- Upscale models (ESRGAN, SwinIR)
1000+ Custom Nodes
Community-built extensions: AnimateDiff (video), FaceRestore, Segment Anything, InstantID, and many more via ComfyUI Manager.
API & Automation
Full REST API for headless generation. Queue prompts, get results programmatically:
import requests
requests.post("http://127.0.0.1:8188/prompt", json={"prompt": workflow})Performance
- GPU-optimized with automatic memory management
- Queue system for batch generation
- Supports NVIDIA, AMD, Apple Silicon
FAQ
Q: What is ComfyUI? A: A node-based AI image generation GUI and backend with 107K+ GitHub stars. Build complex Stable Diffusion workflows visually by connecting nodes. The most popular open-source image generation tool.
Q: Is ComfyUI free? A: Yes, fully open-source under GPL-3.0. Requires a GPU (NVIDIA recommended) and locally-downloaded model weights.