Developer Tools
Regex Tester
Build and debug regular expressions with real-time feedback
Pattern
/
/
Valid Regex
Test String
Match Details
0 Matches
Real-time Analysis
About the Regex Tester
A free regex tester. Type a pattern and a sample, then see each match update as you edit.
How to use the Regex Tester
- Enter the regular expression.
- Paste the sample text.
- Read the matches and adjust the pattern.
What to check
Patterns can differ between JavaScript and other languages. Test the same pattern in the language you will ship.
Which regex flavour does the tester use?
It uses the browser JavaScript regular expression engine.
Can I test a pattern against several lines?
Yes. Paste the full sample, including line breaks, into the text box.
Enterprise Grade Regex Tooling • Precision Matching Engine • Version 1.0.0