ComfyUI – Watermark Sentence Remover

A custom ComfyUI node that batch-processes .txt files from an input folder, removes every sentence containing the word "Watermark", and saves the cleaned files to an output folder – keeping the original filenames.

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Features

• Processes all .txt files in the specified input folder sequentially
• Removes any sentence that contains the word Watermark (case-insensitive by default)
• Saves cleaned files to a user-defined output folder with the original filename
• Creates the output folder automatically if it does not exist
• Optional Dry Run mode – analyse without writing any files
• Optional Case Sensitive mode
• Returns a status message, file count, and removed-sentence count as node outputs
• Compatible with Python 3.13+

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Installation

1. Clone or download this repository into your ComfyUI custom nodes folder:

cd ComfyUI/custom_nodes/
git clone https://github.com/Slartibart23/comfyui-watermark-remover.git

2. Restart ComfyUI.

The node will appear in the node menu under text › processing as "Watermark Sentence Remover 🧹".

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Node Inputs

| Input | Type | Required | Description | |---|---|---|---| | input_folder | STRING | ✅ | Full path to the folder containing source .txt files | | output_folder | STRING | ✅ | Full path to the folder where cleaned files will be saved | | dry_run | BOOLEAN | ➖ | If enabled, no files are written (default: off) | | case_sensitive | BOOLEAN | ➖ | If enabled, only Watermark (capital W) is matched (default: off) |

Node Outputs

| Output | Type | Description | |---|---|---| | status_message | STRING | Human-readable processing summary | | files_processed | INT | Number of files successfully processed | | sentences_removed | INT | Total number of sentences removed across all files |

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How It Works

Sentences are identified by the period . character as a terminator.

Example input:

This is a normal sentence. This image contains a Watermark from Example Corp. Enjoy your day.

Example output:

This is a normal sentence. Enjoy your day.

The sentence "This image contains a Watermark from Example Corp." is detected and removed. The surrounding sentences are left intact.

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Running Tests

cd comfyui-watermark-remover
pip install pytest
python -m pytest tests/ -v

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Requirements

• Python 3.13+
• ComfyUI (any recent version)
• No additional Python packages required (uses standard library only)

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License

MIT License – see LICENSE for details.