ConfyUI

ComfyUI is the most powerful, modular, node-based engine for generative AI (Stable Diffusion, Flux, etc.).

ComfyUI delivers a robust, 100% open-source, node-based interface for generative AI: it's the core engine for advanced workflows. Users visually connect nodes (e.g., 'Load Checkpoint,' 'K Sampler,' 'VAE Decode') to build complex, non-linear pipelines, granting granular control over the entire image or video generation process. This modularity supports major models (Stable Diffusion, Flux, Tencent's Hunyuan-DiT) and allows for extensive customization via custom nodes (1,674+ supported as of December 2024), ensuring faster local iteration and complete control over the inference engine.

https://comfy.org/