ComfyUI is an open-source, free-to-use node-based platform for generative AI that empowers users to create, construct, and share their projects without constraints. It enhances its capabilities through customizable nodes, allowing individuals to adapt their workflows according to their unique requirements. Built for optimal performance, ComfyUI executes workflows directly on personal computers, resulting in quicker iterations, reduced expenses, and total oversight. The intuitive visual interface enables users to manipulate nodes on a canvas, providing the ability to branch, remix, and tweak any aspect of the workflow at any moment. Effortless saving, sharing, and reuse of workflows are possible, with exported media containing metadata for seamless reconstruction of the entire process. Users also benefit from real-time results as they make adjustments to their workflows, promoting rapid iteration coupled with immediate visual feedback. ComfyUI caters to the creation of diverse media formats, such as images, videos, 3D models, and audio files, making it a versatile tool for creators. Overall, its user-friendly design and robust features make it an essential resource for anyone venturing into generative AI.