- ComfyUI is a powerful and modular stable diffusion GUI with a graph/nodes interface - Design and execute advanced stable diffusion pipelines in a flowchart-based interface - Supports SD1.x and SD2.x with optimizations such as re-executing only parts of the workflow that change between executions - Load checkpoints and safetensors models, and various upscaling models (ESRGAN, ESRGAN variants, SwinIR, Swin2SR, etc.) - Save/load workflows as JSON files, and generate and load full workflows from PNG files