Regex to Collapse Blank Lines

Helpful when normalizing pasted docs, generated markdown, or support transcripts with too much vertical space.

Regex

/\n{3,}/g

Try this pattern

Matches current input

Test text

line1 line2

1 match found in the current text.

JavaScript

const regex = /\n{3,}/g;
regex.test(input);

Python

import re
pattern = re.compile(r"\n{3,}")
bool(pattern.search(input))

re := regexp.MustCompile("\\n{3,}")
matched := re.MatchString(input)