RegexReplace - ComfyUI Built-in Node Documentation

Complete documentation for the RegexReplace node in ComfyUI. Learn its inputs, outputs, parameters and usage.

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The RegexReplace node finds and replaces text in strings using regular expression patterns. It allows you to search for text patterns and replace them with new text, with options to control how the pattern matching works including case sensitivity, multiline matching, and limiting the number of replacements.

Inputs

Parameter	Data Type	Required	Range	Description
string	STRING	Yes	-	The input text string to search and replace within
regex_pattern	STRING	Yes	-	The regular expression pattern to search for in the input string
replace	STRING	Yes	-	The replacement text to substitute for matched patterns
case_insensitive	BOOLEAN	No	-	When enabled, makes the pattern matching ignore case differences (default: True)
multiline	BOOLEAN	No	-	When enabled, changes the behavior of ^ and $ to match at the start/end of each line rather than just the start/end of the entire string (default: False)
dotall	BOOLEAN	No	-	When enabled, the dot (.) character will match any character including newline characters. When disabled, dots won’t match newlines (default: False)
count	INT	No	0-100	Maximum number of replacements to make. Set to 0 to replace all occurrences (default). Set to 1 to replace only the first match, 2 for the first two matches, etc. (default: 0)

Outputs

Output Name	Data Type	Description
output	STRING	The modified string with the specified replacements applied