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Stable Diffusion WebUI Forge

github.com

Free plan WebWindowsmacOSLinuxAPISelf-hosted
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Spec score 8.9 #12 of 124 in AI image generators

What it is

Stable Diffusion WebUI Forge is a free, open-source platform built on Stable Diffusion WebUI for image generation and editing. It supports text-to-image creation, reference images, and image editing, with PNG, JPG, JPEG, WebP, AVIF, and GIF listed as output formats. The project aims to ease development, manage resources, speed inference, and explore experimental features. Its interface is based on Gradio, and the README offers a one-click installation package that includes Git and Python. Windows launch scripts, shell scripts, a macOS environment script, and source installation instructions are listed. Forge includes GPU memory management and components such as LoRAs, ControlNets, IP-Adapters, Instant-IDs, reference-only methods, and extensions. Several Flux BitsandBytes and GGUF variants are natively supported, with GPU weight and swap controls; some variants support LoRA. The README lists txt2img and img2img API endpoints as normal, while improved Flux support is pending. The project is described as under construction, so its documentation, interface, and functionality may change. Its license is AGPL-3.0.

Spec sheet

Purpose
Forge is a platform built on Stable Diffusion WebUI and Gradio to ease development, optimize resource management, speed up inference, and study experimental features.Read 12 Oct 2026 · github.com
API
The README lists txt2img and img2img API endpoints as normal in its status table, with improved Flux support pending.Read 12 Oct 2026 · github.com
Security
The repository's Security page is titled Overview and provides no security or compliance details in the opened page.Read 12 Oct 2026 · github.com
Support
The maintainer invites users to open issues for problems and says they will check them every several days.Read 12 Oct 2026 · github.com
License
The repository identifies its license as AGPL-3.0.Read 12 Oct 2026 · github.com
Advanced installation
Users proficient with Git can install Forge as another SD-WebUI branch and reuse their existing checkpoints and extensions.Read 12 Oct 2026 · github.com
API access
YesRead 20 Sep 2026 · github.com
API status
The README marked txt2img and img2img API endpoints normal, with improved Flux support pending, in a status entry last tested in August 2024.Read 12 Oct 2026 · github.com
Compatibility limits
The README marks ControlNets Union and Flux as not yet implemented, OFT LoRAs as broken pending a fix, and Microsoft Surface canvas pressure support as broken pending a fix.Read 12 Oct 2026 · github.com
Compatibility status
The README's manually tested status table says Microsoft Surface canvas touch pressure support was broken pending a fix, and Flux and Union ControlNets were not yet implemented; those entries were last tested in 2024.Read 12 Oct 2026 · github.com
Extension ecosystem
The project maintains a discussion thread for extension makers to list extensions and replacements for Forge.Read 12 Oct 2026 · github.com
Flux support
The README states that several Flux BitsandBytes and GGUF variants are natively supported with GPU weight and swap controls, and that some variants support LoRA.Read 12 Oct 2026 · github.com
Image editing
YesRead 20 Sep 2026 · github.com
Image workflows
The README lists txt2img and img2img API endpoints, ControlNet, IP-Adapters, Instant-IDs, reference-only methods, and integrated extensions among its status-tested components.Read 12 Oct 2026 · github.com
Installation
The README recommends a one-click installation package that includes Git and Python, with CUDA 12.1 and PyTorch 2.3.1.Read 12 Oct 2026 · github.com
Integration
The README says Forge can be installed as another SD-WebUI branch to reuse existing checkpoints and extensions.Read 12 Oct 2026 · github.com
Interface
The project says Stable Diffusion WebUI is based on Gradio.Read 12 Oct 2026 · github.com
Model support
The README says Flux BitsandBytes NF4 and several GGUF quantizations are natively supported, with LoRA support for specified NF4 and GGUF variants.Read 12 Oct 2026 · github.com
Models and extensions
The README lists LoRAs, ControlNets, IP-Adapters, Instant-IDs, reference-only methods, and integrated and popular extensions among its components.Read 12 Oct 2026 · github.com
Output formats
PNG,JPG,JPEG,WebP,AVIF,GIFRead 20 Sep 2026 · github.com
Pricing
The opened project page describes downloadable installation packages but does not state a price or list paid plans.Read 12 Oct 2026 · github.com
Project status
The README says Forge is under construction and that its documentation, UI, and functionality may change with updates.Read 12 Oct 2026 · github.com
Reference images
YesRead 20 Sep 2026 · github.com
Resource management
The README lists a GPU memory management system among Forge components it manually tested.Read 12 Oct 2026 · github.com
Supported environments
The repository includes Windows batch launch scripts, shell scripts, and a macOS environment script, and documents installation from source.Read 12 Oct 2026 · github.com
Text-to-image
YesRead 20 Sep 2026 · github.com

Plans and prices

Free Free self-installed software · one-click package includes Git and Python · CUDA 12.1 + PyTorch 2.3.1 recommended Read 12 Oct 2026 · github.com

Every Stable Diffusion WebUI Forge plan and price →

Strong points and limits

Strong points

  • Supports text-to-image, reference images, and image editing.
  • One-click package includes Git and Python.
  • Lists txt2img and img2img API endpoints as normal.
  • Can reuse existing checkpoints and extensions as an SD-WebUI branch.

Limits

  • Project documentation, UI, and functionality may change.
  • Flux and Union ControlNets are not yet implemented.
  • OFT LoRAs and Surface canvas pressure support are marked broken.
  • Improved Flux API support is pending.

Who it suits

Forge suits users seeking self-installed Stable Diffusion image generation and editing, including people who want API endpoints, reference-image workflows, or to reuse existing checkpoints and extensions. Its changing project status and listed compatibility limits matter to users relying on specific features.

Verdict

Forge lists broad image workflows, installation paths, and model components, while also documenting unfinished areas. Review compatibility status for the specific ControlNet, LoRA, or API workflow you need.

Where Specifiction places it

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