Powerful node-based UI for Stable Diffusion and other AI image models — build custom generation pipelines with a visual graph editor.
ComfyUI is the most powerful open-source UI for running Stable Diffusion and other AI image generation models. Instead of simple prompt boxes, ComfyUI gives you a node-based graph editor where every step of the generation process — model loading, sampling, encoding, upscaling, LoRA application — is a visible, connectable node. You can build any workflow imaginable: img2img pipelines, inpainting chains, ControlNet rigs, video generation, and more. Everything runs locally on your GPU (NVIDIA, AMD, or Apple Silicon). The community has built thousands of custom nodes extending ComfyUI with new models and capabilities. Free and open-source.
ComfyUI is the most powerful open-source UI for running Stable Diffusion and other AI image generation models. Instead of simple prompt boxes, ComfyUI gives you a node-based graph editor where every step of the generation process — model loading, sampling, encoding, upscaling, LoRA application — is a visible, connectable node. You can build any workflow imaginable: img2img pipelines, inpainting chains, ControlNet rigs, video generation, and more. Everything runs locally on your GPU (NVIDIA, AMD, or Apple Silicon). The community has built thousands of custom nodes extending ComfyUI with new models and capabilities. Free and open-source.
Tags: AI Generation, Image, Open Source, Stable Diffusion
Try ComfyUIYes — completely free and open-source. You need your own GPU and model files.
NVIDIA GPUs with CUDA work best. AMD (ROCm) and Apple Silicon (MPS) are also supported.
Stable Diffusion (1.5, XL), Flux, SDXL, ControlNet, and hundreds more via community nodes.