ComfyUI
- Price
- Free
- API
- No
- Weights
- Yes
WHAT IT DOES
ComfyUI is an open-source node-based interface for diffusion models. Instead of a prompt box, a generation is a graph: loaders, samplers, conditioning, upscalers and masks wired together, each step inspectable and re-runnable. Workflows save as JSON and can be shared, which is why most published Stable Diffusion and FLUX pipelines circulate as ComfyUI graphs.
WHY WE PICKED IT
If you want to know exactly what happened between the prompt and the image, this is the tool that shows you. Every step is a node you can open, change and re-run, and a workflow someone else built arrives as a file you can load rather than a screenshot you have to reverse engineer. That reproducibility is why it became the format the rest of the field builds around.
QUICK FACTS
STRENGTHS
- ✓Every step of a generation is inspectable and re-runnable
- ✓Workflows are portable JSON, not screenshots
- ✓Runs entirely on your own hardware, no per-image cost
LIMITATIONS
- ⚠Self-hosted only. There is no product to sign into, and you supply the GPU
- ⚠The graph is the interface, so simple jobs take more setup than a prompt box
OFFICIAL LINKS
SIMILAR TOOLS
PRICING
FEATURED IN GUIDES
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EXPLORE ALTERNATIVES
Compare ComfyUI with 5+ similar image → image AI tools.
FREQUENTLY ASKED QUESTIONS
Is ComfyUI free?
Yes, ComfyUI is completely free to use.
Does ComfyUI have an API?
No, ComfyUI does not appear to offer a public API.
What is ComfyUI best for?
ComfyUI is best for control. ComfyUI is an open-source node-based interface for diffusion models. If you want to know exactly what happened between the prompt and the image, this is the tool that shows you. Every step is a node you can open, change and re-run, and a workflow someone else built arrives as a file you can load rather than a screenshot you have to reverse engineer. That reproducibility is why it became the format the rest of the field builds around.
What platforms does ComfyUI support?
ComfyUI supports local.
Is ComfyUI open source?
Yes, ComfyUI is open source. You can access the source code on GitHub at https://github.com/comfyanonymous/ComfyUI.
How do I generate images with ComfyUI?
ComfyUI creates images from text descriptions. Enter detailed prompts describing the image you want, including style, composition, colors, and subject matter. It excels at every step of a generation is inspectable and re-runnable.
How do I edit images with ComfyUI?
ComfyUI transforms and edits existing images. Upload an image and use text prompts or controls to modify style, enhance quality, remove objects, or apply transformations. It excels at every step of a generation is inspectable and re-runnable.
FEATURED ON CURATEDAI
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