Multi LoRA Stack for ComfyUI

[](LICENSE)

[](https://github.com/comfyanonymous/ComfyUI)

[](https://python.org)

Powerful standalone ComfyUI custom nodes for managing multiple LoRAs in a single, dynamic interface

A complete replacement for rgthree’s Power Lora Loader with zero dependencies and two specialized versions to fit any workflow.

✨ Features

🎛️ Dynamic Interface – Add unlimited LoRA slots with a single click

🔄 Easy Management – Toggle, reorder, and remove LoRAs with intuitive controls

💪 Dual Versions – Choose between full functionality or model-only optimization

📊 Visual Feedback – Clean, wide interface with clear status indicators

⚡ Performance – Efficient loading and processing of multiple LoRAs

🔧 No Dependencies – Standalone implementation, works with any ComfyUI installation

🚀 Quick Start

Installation

Clone or download this repository to your ComfyUI custom nodes directory:

“`bash

cd ComfyUI/custom_nodes/

git clone https://github.com/ShmuelRonen/multi-lora-stack.git

“`

Restart ComfyUI

Find the nodes in the loaders category:

Multi LoRA Stack – Full version with MODEL + CLIP

Multi LoRA Stack (Model Only) – Streamlined model-only version

Basic Usage

Add either node to your workflow

Connect your base MODEL (and CLIP for full version)

Click “➕ Add LoRA” to add LoRA slots

Select LoRAs from the dropdown menus

Adjust strength values as needed

Toggle individual LoRAs on/off or use “Toggle All”

📊 Node Versions

| Feature | Multi LoRA Stack | Multi LoRA Stack (Model Only) |

|———|———————|———————————-|

| Inputs | MODEL + CLIP | MODEL only |

| Outputs | MODEL + CLIP | MODEL only |

| Best For | Style LoRAs, Character LoRAs, Complex workflows | Flux LoRAs, Performance-focused workflows |

| Interface | 4 connection points | 2 connection points |

| Performance | Standard | Optimized |

When to Use Which?

Choose Multi LoRA Stack (Full):

Working with style or character LoRAs

Need CLIP text encoding modifications

Maximum compatibility with existing workflows

Professional/production work

Choose Multi LoRA Stack (Model Only):

Using modern LoRAs (especially Flux)

Performance-critical workflows

Prefer cleaner, simpler interface

Experimental/testing workflows

🎛️ Controls

Main Controls

➕ Add LoRA – Adds a new LoRA slot

Toggle All LoRAs – Enables/disables all LoRAs at once

Per-LoRA Controls

Enable Toggle – Turn individual LoRAs on/off

LoRA Dropdown – Select from available LoRAs

Strength Slider – Adjust influence (-2.0 to +2.0)

Remove Button – Delete the LoRA slot

📝 Technical Details

File Structure

multi-lora-stack/
├── __init__.py                          # Node registration
├── multi_lora_stack.py                  # Full version backend
├── multi_lora_stack_model_only.py       # Model-only backend
└── web/
    ├── multi_lora_stack.js              # Full version UI
    └── multi_lora_stack_model_only.js   # Model-only UI

Data Format

LoRA configurations are stored as JSON:

[
  {
    "on": true,
    "lora": "flux/style_lora.safetensors",
    "strength": 1.0
  },
  {
    "on": false,
    "lora": "character_lora.safetensors", 
    "strength": 0.8
  }
]

Backend Processing

Full Version: Uses ComfyUI’s LoraLoader() for MODEL + CLIP processing

Model Only: Uses ComfyUI’s LoraLoaderModelOnly() for optimized model-only processing

🔧 Installation Details

Method 1: Git Clone (Recommended)

cd ComfyUI/custom_nodes/
git clone https://github.com/yourusername/multi-lora-stack.git

Method 2: Manual Download

Download the repository as ZIP

Extract to ComfyUI/custom_nodes/multi-lora-stack/

Ensure the file structure matches the layout above

Method 3: Individual Files

Create the directory structure and copy files:

mkdir -p ComfyUI/custom_nodes/multi-lora-stack/web/
# Copy each file to its respective location

🐛 Troubleshooting

Nodes Don’t Appear

✅ Verify file structure matches exactly

✅ Check ComfyUI console for error messages

✅ Restart ComfyUI completely

✅ Ensure all Python files are in the root directory

LoRA Dropdown Empty

✅ Verify LoRAs exist in models/loras/ directory

✅ Test with ComfyUI’s standard LoRA Loader first

✅ Check file permissions

JavaScript Errors

✅ Ensure JS files are in the web/ subdirectory

✅ Check browser console (F12) for specific errors

✅ Clear browser cache and reload

LoRAs Not Loading

✅ Check ComfyUI console for debug output

✅ Verify LoRA names match exactly with files

✅ Ensure LoRAs are enabled (toggle on)

✅ Test strength values (non-zero)

🆚 Comparison with rgthree Power Lora Loader

| Feature | Multi LoRA Stack | rgthree Power Lora Loader |

|———|———————|——————————-|

| Dependencies | ✅ None (standalone) | ❌ Requires rgthree framework |

| Installation | ✅ Simple (drop-in) | ❌ Complex (dependencies) |

| Versions | ✅ Two optimized versions | ⚪ Single version |

| Compatibility | ✅ Any ComfyUI installation | ❌ Requires rgthree ecosystem |

| Updates | ✅ Independent updates | ❌ Dependent on rgthree updates |

| Interface | ✅ Wide, clean design | ⚪ Compact design |

🤝 Contributing

Contributions are welcome! Please:

Fork the repository

Create a feature branch (git checkout -b feature/amazing-feature)

Commit your changes (git commit -m 'Add amazing feature')

Push to the branch (git push origin feature/amazing-feature)

Open a Pull Request

Development Setup

# Clone the repo
git clone https://github.com/ShmuelRonen/multi-lora-stack.git
cd multi-lora-stack

# Make changes and test in ComfyUI
# Follow the installation instructions above for testing

📄 License

This project is licensed under the MIT License – see the LICENSE file for details.

🙏 Acknowledgments

Inspired by rgthree’s Power Lora Loader

Built for the ComfyUI community

Thanks to all contributors and testers

📞 Support

Issues: GitHub Issues

Discussions: GitHub Discussions

ComfyUI: ComfyUI Repository

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⭐ If this project helps your workflow, please give it a star!

Made with ❤️ for the ComfyUI community