Regex Tester & Validator

Matches regex101.com permalink URLs line-by-line, optionally allowing an http:// or https:// protocol prefix and a www. subdomain (note: the dot after w{3} matches any character, not just a period). The trailing \w+ grabs the unique regex ID from paths like regex101.com/r/abc123. Commonly used to extract or validate shared regex101 links from text, though it won't match trailing slashes, query strings, or flavor/flags suffixes.