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Fooocus

Stable Diffusion XL, dialed to one button.

Open Source 4–8 GB VRAMRuns locally
Actually FreeNo SignupOpen SourceWatermark-FreeHobbyist-Friendly
Visit FooocusUpdated 2026-04-10 · Direct link

Hardware requirements

Runs locally · Entry GPU (6–8 GB)

4–8 GB VRAM
Min VRAM
4 GB
Rec. VRAM
8 GB
Min RAM
16 GB
Rec. RAM
16 GB
Disk
20 GB
GPU class
Entry GPU
11.8+Apple Silicon ✓GPU RequiredQuant: FP16

4 GB VRAM via offload (slow); 8 GB+ recommended for comfortable SDXL.

Screenshot placeholder · Fooocus

What is Fooocus?

Fooocus strips away the prompt engineering and settings sprawl of A1111 and ComfyUI, leaving a single text box and a 'Generate' button. Under the hood it runs SDXL with sane defaults, automatic prompt refinement, and built-in inpainting and image prompts. Great as an SDXL on-ramp before you graduate to a node graph.

Pros & cons

Pros

  • Zero-config SDXL — works on 4 GB VRAM with offload
  • Built-in prompt expansion (GPT-2 based) writes better prompts than most users
  • Clean Gradio UI; inpainting / image-prompt / advanced tabs hidden by default
  • Active maintenance with a tight feature scope (no plugin sprawl)

Cons

  • SDXL only — no SD 1.5, SD3, or Flux without forks
  • Less control surface than ComfyUI for advanced workflows

What's actually free?

Fully free, MIT-licensed, no signup.

✓ Actually FreeNo SignupOpen SourceWatermark-Free

Alternatives

Stable Diffusion WebUI Forge

Optimized A1111 fork for low-VRAM cards.

Open Source 4–8 GB VRAM
Min VRAM
4 GB
GPU class
Entry GPU
Quant
FP16
Actually FreeNo SignupOpen SourceWatermark-Free

InvokeAI

Production-leaning SD studio with canvas & batch.

Open Source 8–16 GB VRAM
Min VRAM
8 GB
GPU class
Mid GPU
Quant
FP16
Actually FreeNo SignupOpen SourceWatermark-Free

ComfyUI

The nodal workflow engine for serious diffusion.

Open Source 6–16 GB VRAM
Min VRAM
6 GB
GPU class
Mid GPU
Quant
FP16
Actually FreeNo SignupOpen SourceWatermark-Free