Regex Tester
Test and debug regular expressions
How to use
Enter a regular expression pattern and flags, then type a test string to see all matches highlighted in real time. Common flags: g (global), i (case insensitive), m (multiline), s (dotall).
- Real-time matching with highlighted results
- Live match count and detailed match list
- Supports all JS regex flags (g, i, m, s, u, y)
- Everything runs in your browser — nothing is uploaded