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Legacy Stable Diffusion WebUI

A minimalistic, JavaScript-free web interface and processing server for Stable Diffusion, designed specifically for being accessed by legacy systems and browsers. This interface relies on the API from AUTOMATIC1111's Stable Diffusion WebUI.

Features

Two separate interfaces are provided:

  • index.php: HTML 4.01+ compliant interface
  • legacy.php: HTML 3.2 compliant interface for extremely old systems

Common features across both versions:

  • No JavaScript dependencies
  • Lightweight and fast loading
  • Support for LORA models using square bracket syntax
  • Image optimization with automatic PNG to JPG conversion
  • Prompt saving and loading functionality
  • Full configurability of key generation parameters:
    • Image dimensions
    • Sampling steps
    • CFG Scale
    • Choice of sampling methods

Browser Compatibility

  • index.php: Tested working on IE4+ and comparable browsers
  • legacy.php: Tested working on IE3 and comparable browsers
  • Both versions work on modern browsers

Requirements

  • PHP 8+ (Tested on frankenphp running on Debian 12, should also run with traditional PHP setups with apache/nginx)
  • ImageMagick for image optimization
  • Curl
  • Running instance of AUTOMATIC1111's Stable Diffusion WebUI with API access enabled
  • Web server (Apache, nginx, etc.)

Installation

  1. Ensure you have AUTOMATIC1111's Stable Diffusion WebUI running with the --api flag
  2. Install PHP and ImageMagick on your system
  3. Copy both index.php and legacy.php to your web server directory
  4. Ensure the directory is writable by the web server for saved prompts and generated images
  5. Access through your web browser:
    • Use index.php for HTML 4.01+ compatible browsers
    • Use legacy.php for HTML 3.2 compatible browsers

Usage

  1. Enter your prompt in the text area
  2. Configure generation parameters as needed
  3. Click "Generate Image" to create your image
  4. Save frequently used prompts server-side using the "Save Prompt" feature
  5. Load saved prompts from the dropdown menu

LORA Usage

To use LORA models, include them in your prompt using square brackets: [lora-name:weight]

Example: a beautiful landscape by [my-artist-lora:0.8]

Notes

  • Images are automatically optimized and converted from PNG to JPG for faster loading
  • The interface works without any client-side scripting
  • All processing is done server-side
  • Compatible with browsers from the late 1990s to now
  • The HTML 3.2 version (legacy.php) provides basic functionality for extremely old mid 1990s browsers

Why Two Versions?

  • index.php provides a more refined interface with better styling and layout options, suitable for browsers supporting HTML 4.01+
  • legacy.php strips down the interface to basic HTML 3.2 for maximum compatibility with vintage systems and browsers
  • Both achieve the same core functionality with different levels of visual polish

Contributing

Contributions are welcome! Please feel free to submit a Pull Request or fork.

License

This project is MIT licensed.

Credits

Built to work with AUTOMATIC1111's Stable Diffusion WebUI API: https://github.com/AUTOMATIC1111/stable-diffusion-webui