regex

List every regex match found in text, one per line.

Wrap every regular expression match with a marker string on both sides.

Generate a random sample string that matches a regex pattern.

Check whether a regex pattern matches text, with a total match count.

Generate a random, syntactically valid regex pattern composed from character classes, quantifiers, and groups.

Enter a regex pattern and generate random strings that actually match it.

Build a regex that matches exactly a given set of integers, via literal alternation.

Generate example integers matching a numeric regex pattern (a documented, restricted subset).