Regex Tester & Validator

This regex captures content between XML or HTML-like opening and closing tags. It extracts everything between `<tag>` and `</tag>` patterns, including newlines, using a non-greedy match. The capture group (first group) contains the inner content. While useful for simple tag extraction, it has limitations: it doesn't validate tag names, doesn't ensure matching opening/closing tags, and may struggle with nested structures. For complex XML processing, consider using a proper XML parser.