Regex Tester
A real-time regular expression tester. Enter your regex pattern and test text to see matches instantly.
How to Use
- Enter Regex: Type your regular expression pattern in the first field
- Add Test Text: Enter the text you want to test against
- See Results: View matches in real-time as you type
Enter regex and text above to see matches...
Matches: 0
Features
- Real-time Testing: See results as you type
- Match Details: View each match with position information
- Error Handling: Clear error messages for invalid regex
- Responsive Design: Works on all devices
Privacy & Security
🔒 100% Client-side: All processing happens in your browser. No data is sent to any server or saved anywhere.
Common Regex Patterns
| Pattern | Description | Example |
|---|---|---|
\d+ |
One or more digits | 123, 456 |
[a-z]+ |
One or more lowercase letters | hello, world |
\w+ |
One or more word characters | hello123, world_ |
\s+ |
One or more whitespace characters | \t |
^ |
Start of line | ^Hello |
$ |
End of line | world$ |
.* |
Any character (zero or more) | .* |
.+ |
Any character (one or more) | .+ |
[0-9]{3} |
Exactly 3 digits | 123, 456 |
[a-zA-Z]{2,4} |
2-4 letters | ab, xyz, abcd |