Online Regex Tester and Highlighter
Quickly test and validate your regular expressions online. This regex tester highlights matches, shows groups, and helps you debug patterns easily.
Tips
- • Start with simple patterns and build complexity
- • Test with various input types
- • Use anchors (^, $) for precise matching
- • Escape special characters with backslash
- • Use capture groups for extracting data
- • Avoid catastrophic backtracking
- • Use Unicode flag for international text
- • Use multiline mode for line-by-line matching