Upscaler Filename

ComfyUI-Upscaler-Filename

A small utility custom node for ComfyUI that loads an upscale model and automatically generates clean filename prefixes based on the selected upscaler name.

It is useful when testing multiple upscalers because saved images and videos can be named after the model used, avoiding confusion between outputs.

Node

Upscale Model Loader with Filename

The node behaves like an upscale model loader, but also outputs strings that can be connected to filename fields.

Inputs

| Input | Description | |---|---| | model_name | Upscale model from models/upscale_models | | image_base | Base output prefix for images | | video_base | Base output prefix for videos |

Outputs

| Output | Description | |---|---| | upscale_model | Connect to ImageUpscaleWithModel | | model_name_clean | Sanitized model filename without extension | | image_filename_prefix | Prefix for Save Image | | video_filename_prefix | Prefix for VHS Video Combine or compatible video save nodes |

Example:

RealESRGAN_x4plus.pth

becomes:

RealESRGAN_x4plus
UpscalerFilename/Image_RealESRGAN_x4plus
UpscalerFilename/Video_RealESRGAN_x4plus

Installation

Manual install

1. Download this repository as a ZIP.
2. Extract it into your ComfyUI custom nodes folder:

ComfyUI/custom_nodes/ComfyUI-Upscaler-Filename/

3. Restart ComfyUI.

Git install

From your ComfyUI custom_nodes folder:

git clone https://github.com/giusparsifal/ComfyUI-Upscaler-Filename.git

Then restart ComfyUI.

Usage

1. Add Upscale Model Loader with Filename.
2. Choose your upscale model.
3. Connect upscale_model to ImageUpscaleWithModel.
4. Convert the filename_prefix widget of Save Image or VHS Video Combine to an input.
5. Connect:
   • image_filename_prefix to Save Image / filename_prefix
   • video_filename_prefix to VHS Video Combine / filename_prefix

Now, when you change the selected upscaler, the output filename prefix changes automatically.

Notes

• The node sanitizes model names so they are safe for filenames.
• It removes the model extension, such as .pth or .safetensors.
• It preserves folder-style prefixes, for example UpscalerFilename/Image.
• No external dependencies are required beyond ComfyUI's normal upscale model dependencies.

Example workflow

See example_workflows/upscaler_filename_example.json.

License

MIT License. See LICENSE.