ComfyUI Launcher

A modern, web-based graphical launcher for ComfyUI that replaces the default command prompt window with a richer dark dashboard.

Features

• Modern Web UI - Clean, dark-themed interface that opens in your browser
• Real-time Console Output - Split view with main logs on the left and errors/warnings on the right
• Startup Progress Tracking - Visual progress bar showing ComfyUI loading stages
• Stop All Control - Immediately stops ComfyUI process trees and clears the ComfyUI port
• Open ComfyUI Button - Re-open the ComfyUI browser tab from the launcher
• GPU Telemetry - Shows GPU utilization, VRAM, temperature, clocks, power, CUDA, Torch, and driver info
• Models & Dependencies Dashboard - Counts model folders and shows key Python dependency versions
• Recent Output Thumbnails - Browse recent generated images and open the output folder
• Workflow Activity Tracker - See what ComfyUI is doing in real-time:
  • Loading checkpoints
  • Generating images (with progress bar)
  • VAE decoding
  • Completion time
• Generation Speed Display - Shows current generation speed (s/it or it/s)
• Error/Warning Counter - Quick visibility into issues
• Settings Panel - Configure listen address, port, and extra arguments
• Update Integration - Built-in buttons to update ComfyUI
• Copy Logs - One-click copy of console output for debugging
• No External Dependencies - Uses only Python's built-in libraries

Screenshots

Stopped State

Running with Workflow Activity

Generation Complete

Settings Panel

Installation

1. Download ComfyUI_Launcher.pyw and place it in your ComfyUI root directory (the folder containing ComfyUI/, python_embeded/, etc.)

2. Optionally, download ComfyUI_Launcher.bat for a convenient shortcut

Your folder structure should look like:

<your install folder>\              (any drive or folder)
├── ComfyUI/                        (ComfyUI source code)
├── python_embeded/                 (Embedded Python)
├── update/                         (Update scripts - optional)
├── ComfyUI_Launcher.pyw           <- Place here
└── ComfyUI_Launcher.bat           <- Place here (optional)

Usage

Option 1: Double-click the .pyw file

Simply double-click ComfyUI_Launcher.pyw to start the launcher.

Option 2: Use the batch file

Double-click ComfyUI_Launcher.bat for a cleaner launch (no Python window).

Option 3: Run from command line

python ComfyUI_Launcher.pyw

The launcher will:

1. Open a web interface at http://127.0.0.1:8199
2. Click "Start ComfyUI" to launch ComfyUI
3. ComfyUI will run on its configured port (default: 8188)

Configuration

Click the Settings button to configure:

• Listen Address - Network interface to bind to (default: 0.0.0.0 for all interfaces)
• Port - ComfyUI server port (default: 8188)
• Extra Arguments - Additional command line arguments (e.g., --lowvram, --cpu)
• Auto-launch browser - Automatically open ComfyUI when ready

Settings are saved to launcher_settings.json.

Updating ComfyUI

Click the Update button to access update options:

• Update ComfyUI (Latest) - Update to the latest development version
• Update ComfyUI (Stable) - Update to the latest stable release
• Full Update - Update ComfyUI and all Python dependencies

Note: ComfyUI must be stopped before updating.

Requirements

• Windows (uses Windows-specific process management)
• ComfyUI standalone installation with embedded Python
• A web browser

How It Works

The launcher:

1. Starts a lightweight HTTP server on port 8199
2. Serves a single-page web application
3. Manages the ComfyUI process in the background
4. Parses ComfyUI's log output in real-time
5. Provides a REST API for the web interface to control ComfyUI

Troubleshooting

Port already in use

The launcher will automatically attempt to free the port or find an alternative.

ComfyUI won't start

Check the console output for errors. Common issues:

• Missing Python dependencies
• GPU driver issues
• Port conflicts

Logs not updating

Try clicking "Clear" and restarting ComfyUI.

License

MIT License - Feel free to modify and distribute.

Credits

Created with Claude Code by Anthropic.