Sygil WebUI

Sygil WebUI is a browser-based interface for Stable Diffusion that turns a local GPU into a full text-to-image studio. Maintained by the Sygil-Dev team, it descends from the original Stable Diffusion web UI lineage and keeps evolving with community features. The project has about 7,900 stars on GitHub, is released under the AGPL-3.0 license, and was still updated in 2026.

Overview

The web UI wraps Stable Diffusion models in a Gradio-style browser app: type a prompt, adjust the sampler, steps, guidance and seed, and generate images without touching the command line. Beyond plain text-to-image it supports image-to-image generation, inpainting and outpainting, upscaling and face restoration workflows, so a single installation covers most everyday image-generation tasks. Models are loaded from local checkpoints, which means generation happens entirely on your own hardware with no per-image API cost and no prompts leaving the machine. For users who remember the early days of open image generation, this fork preserves that classic workflow while continuing to receive maintenance.

Key Features

• Complete browser UI for Stable Diffusion text-to-image generation
• Image-to-image, inpainting and outpainting modes for editing existing pictures
• Control over samplers, steps, CFG scale, seeds and image dimensions
• Built-in upscaling and image enhancement tools
• Runs fully locally on consumer GPUs using your own model checkpoints
• Long-running open-source fork with an active community
• Prompt weighting, negative prompts and batch generation controls for repeatable results
• Extension-friendly design that the community uses to add new workflows

💳 Pricing

Free. Sygil WebUI is open source under the AGPL-3.0 license; you only need your own hardware and Stable Diffusion model weights.

Who Is It For

Artists, hobbyists and developers who want the classic Stable Diffusion web interface for local image generation, with deep manual control over every generation parameter.