FThe Free AI Index
LOC-05Open source

ComfyUI

Node-based app for running image and video models like Stable Diffusion and Flux locally.

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What is ComfyUI?

ComfyUI is a powerful node-based app for running image and video models like Stable Diffusion and Flux locally. Each step of the process is a box you connect, so you have full control.

Used for

Node-based app for running image and video models like Stable Diffusion and Flux locally.

Best for

Advanced image workflows

Price

ComfyUI is open source and free to download and run on your own computer.

How to start for free

  1. Download ComfyUI.
  2. Load a model and a sample workflow.
  3. Edit the prompt and run.

Strengths

  • Full creative control
  • Free and open source

Limits to know

  • Steep learning curve
  • Needs a strong graphics card

Learn more

How to Create AI Images for Free: Prompts, Tools and Tips, How to Run AI on Your Own Computer for Free and Privately

Free plans and limits change often. Check the current details on the official ComfyUI website before relying on it for important work. Last reviewed October 2026.