ComfyUI Path Sanitizer

A ComfyUI custom node that sanitizes strings for use as filesystem paths (directories or filenames).

Features

• Removes/replaces invalid characters - Characters like < > : " / \ | ? * and control characters
• Handles Windows reserved names - CON, PRN, AUX, NUL, COM1-9, LPT1-9
• Unicode normalization - Converts unicode to a standard form (NFKC)
• Strips trailing periods/spaces - Windows doesn't allow these at the end of filenames
• Preserves file extensions - When truncating, tries to keep the extension intact

Installation

Via ComfyUI Manager

Search for "Path Sanitizer" in ComfyUI Manager and click Install.

Manual Installation

1. Navigate to your ComfyUI custom_nodes directory
2. Clone this repository:

   git clone https://github.com/logicalor/comfyui_path_sanitizer.git
   

3. Restart ComfyUI

Usage

The node appears under the utils/string category in the node menu.

Inputs

Input	Type	Default	Description
input_string	STRING	""	The string to sanitize
replacement_char	STRING	"_"	Character to replace invalid characters with
max_length	INT	255	Maximum length of the output string
lowercase	BOOLEAN	False	Convert the result to lowercase
strip_spaces	BOOLEAN	False	Remove all spaces from the result
collapse_replacement	BOOLEAN	True	Collapse consecutive replacement characters into one

Output

Output	Type	Description
sanitized_path	STRING	A clean string safe for filesystem use

Examples

Input	Output
my:file<name>.txt	my_file_name.txt
CON	_CON
hello world	hello world
hello world (strip_spaces=True)	helloworld
My///Path	My_Path
trailing...	trailing

License

MIT License