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Stable Diffusion WebUI

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Run Stable Diffusion locally with extensive features and extensions

AI Image GenerationDeveloper ToolsUI/UX Design
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Tracked since2026
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The Bottom Line

Entry price

Free, no paid tier

Biggest pro

This is a UI that many Stable Diffusion tutorials still assume.

Biggest con

The project moves slower than some other UIs. New research often lands as a custom node first.

TL;DR - Stable Diffusion WebUI

  • The AUTOMATIC1111 Gradio web UI. Free software. A very large number of GitHub stars.
  • txt2img, img2img, inpainting, upscaling, and an extension system for ControlNet and LoRAs.
  • You bring the GPU and the checkpoint files. No hosted plan and no vendor seat.
Pricing: Free forever
Best for: Individuals & startups

What is Stable Diffusion WebUI?

Editorial review
Stable Diffusion WebUI (AUTOMATIC1111) is the open-source Gradio interface that became a popular way to run Stable Diffusion locally. It covers txt2img, img2img, inpainting, upscaling, and an extension system that is how most people load ControlNet, LoRAs, and custom scripts. The GitHub repo has a very large number of stars. It is free software you install on your own GPU. There is no hosted plan and no vendor price. You bring the checkpoint files (Stable Diffusion, SDXL, or community models) and the VRAM. Newer node-graph UIs such as ComfyUI are faster for production pipelines; A1111 remains a UI that many local tutorials still assume.
how we evaluateSourcegithub.com ↗

Pros & Cons

Pros

  • This is a UI that many Stable Diffusion tutorials still assume.
  • Extension ecosystem for ControlNet, LoRAs, and custom scripts. Free, AGPL-style open source on your machine.
  • No hosted subscription. Offline after the models are downloaded.

Cons

  • The project moves slower than some other UIs. New research often lands as a custom node first.
  • You still need VRAM and the checkpoint files. A weak laptop fails here the same way it fails in other UIs.

Preview

Key Features

txt2img and img2imgInpainting and upscalingExtension / script systemLoRA and checkpoint loadingLocal Gradio web UIFree, self-hosted

Pricing Plans

Pricing checked Aug 26, 2026

Open Source

Free

  • Full source code access
  • Community support
  • Self-hosted
Calculate your costView full pricing

Is Stable Diffusion WebUI worth the price?

95/100

This pricing is extremely generous since the entire tool is free and open source, with no paid tiers or hidden fees.

It offers exceptional value for anyone willing to self-host, as there are no usage caps or subscription costs. Best for technically savvy users who want full control and zero ongoing expenses.

Hidden Costs & Gotchas

Requires own GPU hardware investment

Electricity and cooling costs for 24/7 use

No official support; relies on community

Storage costs for models and outputs

Manual updates and maintenance required

How Stable Diffusion WebUI Compares to Competitors

Compared to cloud-based services like Midjourney or Leonardo.ai, this tool is free but requires significant upfront hardware investment and technical setup. It offers far more customization and no usage limits, making it cheaper at scale for heavy users but pricier in time and effort for casual users.

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Stable Diffusion WebUI FAQ

How does Stable Diffusion WebUI handle inpainting and upscaling tasks?

Stable Diffusion WebUI includes built-in support for inpainting and upscaling as core features, accessible directly from the interface. These tools allow you to edit specific areas of an image or increase its resolution without needing external software.

Which teams or users benefit most from using Stable Diffusion WebUI?

Stable Diffusion WebUI is best suited for individual developers, hobbyists, and small teams who want a familiar, tutorial-friendly interface for local image generation. It is especially useful for those who rely on the large extension ecosystem for ControlNet, LoRAs, and custom scripts.

How does Stable Diffusion WebUI compare to ComfyUI for production workflows?

ComfyUI is generally faster for production pipelines due to its node-graph architecture, while Stable Diffusion WebUI remains a more accessible interface that many local tutorials still assume. For users prioritizing speed and complex workflow automation, ComfyUI may be a better fit, but A1111 offers a simpler point-and-click experience.

How is Stable Diffusion WebUI priced?

Stable Diffusion WebUI is free to use with no paid plan required, as it is open-source software you install on your own machine. There is no hosted subscription or vendor price; you only need to provide your own GPU and checkpoint files.

Can Stable Diffusion WebUI run offline after setup?

Yes, Stable Diffusion WebUI can run offline after the models and checkpoint files are downloaded, as it operates entirely on your local machine. This makes it suitable for users who need privacy or lack a constant internet connection.

Does Stable Diffusion WebUI support ControlNet and LoRAs through its extension system?

Yes, Stable Diffusion WebUI supports ControlNet, LoRAs, and custom scripts through its extensive extension ecosystem, which is how most users load these features. The extension system is a key strength of the interface, allowing for broad customization of image generation workflows.

Why do many Stable Diffusion tutorials still assume users have Stable Diffusion WebUI?

Many Stable Diffusion tutorials still assume users have Stable Diffusion WebUI because it was one of the first widely adopted interfaces for running Stable Diffusion locally, and its straightforward Gradio interface made it a standard reference. Its large user base and extensive documentation have kept it relevant in educational content.

Source: github.com

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