/ /
How to Use
Enter your regex pattern and test string. Matches are highlighted in real time. Toggle flags (g, i, m) as needed.
Frequently Asked Questions
What regex flavor does this use?
This tool uses JavaScript's built-in RegExp engine, which supports most common regex features.
What are regex flags?
Flags modify regex behavior: g (global), i (case-insensitive), m (multiline), s (dotAll), u (unicode).
Can I see capture groups?
Yes. Capture groups are displayed with their matched content and group numbers.