ComfyUI-ModelUtils

A collection of ComfyUI custom nodes for inspecting, modifying, merging, and creating model files. Supports Models, TextEncoders, LoRAs, Checkpoints, and Embeddings.

Features

• MetaKeys – Inspect and display metadata and tensor keys from model files
• RenameKeys – Batch rename tensor keys using pattern matching
• PruneKeys – Remove unwanted layers/keys from models
• Mergers – Combine 2 or 3 models with configurable blend modes and ratios
• LoRA Extraction – Extract LoRA adapters from model pairs using various SVD rank selection methods (Fixed, Ratio, Quantile, Knee-detection, Frobenius-norm)

Example Workflows

<p align="center"> <img src="assets/GetMetaAndkeys.png" width="400" alt="Get Meta and Keys"> <br> <a href="example_workflows/GetMetaAndkeys.json">📥 GetMetaAndkeys.json</a> </p>

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<p align="center"> <img src="assets/LoRA_Extract_nodes.png" width="400" alt="LoRA Extraction Nodes"> <br> <a href="example_workflows/LoRA_Extract_nodes.json">📥 LoRA_Extract_nodes.json</a> </p>

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<p align="center"> <img src="assets/Merging_Examples.png" width="400" alt="Merging Examples"> <br> <a href="example_workflows/Merging_Examples.json">📥 Merging_Examples.json</a> </p>

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<p align="center"> <img src="assets/RenameKeysInModel.png" width="400" alt="Rename Keys in Model"> <br> <a href="example_workflows/RenameKeysInModel.json">📥 RenameKeysInModel.json</a> </p>

Acknowledgements

The LoRA extraction functionality was inspired by and references the excellent work from:

• kohya-ss/sd-scripts – Training scripts for Stable Diffusion
• KohakuBlueleaf/LyCORIS – Advanced LoRA techniques
• bmaltais/kohya_ss – Windows-friendly GUI for sd-scripts

License

See LICENSE for details.