Free Regex Tester - Live Pattern Matching
Test regular expressions with real-time matching and groups.
Flags:
g- Global (find all matches)i- Case insensitivem- Multiline (^ and $ match line boundaries)s- Dotall (. matches newlines)
How to Use Free Regex Tester - Live Pattern Matching
The tester compiles your pattern into a JavaScript RegExp object, executes it against your test string, and highlights all matches. Capture group contents are extracted and displayed.
🔒 Privacy First: This tool runs entirely in your browser. Your data never leaves your computer.
Common Use Cases
- Test and debug regular expressions
- Validate input patterns
- Extract data from text using capture groups
- Learn regex with immediate feedback
Free Regex Tester - Live Pattern Matching FAQ
Enter your pattern in the regex field, add test text below, and see matches highlighted in real-time.
All JavaScript regex flags are supported: g (global), i (case-insensitive), m (multiline), s (dotAll), u (unicode).
Yes! The tool displays all capture groups and their matched values for each match.
Check for escape characters (\), flag settings, and ensure your pattern syntax is correct for JavaScript regex.