ComfyUI is a robust and customizable GUI for stable diffusion- featuring a user-friendly graph/nodes interface. With its flowchart-based design- users can effortlessly create and execute advanced stable diffusion pipelines. It is compatible with SD1.x and SD2.x and incorporates numerous optimizations- such as selectively re-executing modified parts of the workflow. Additionally- it supports loading checkpoints and safetensors models- as well as various upscaling models like ESRGAN- ESRGAN variants- SwinIR- Swin2SR- and more. ComfyUI also allows users to save and load workflows as JSON files- and effortlessly generate and load complete workflows from PNG files.