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Regex Tester
Test regular expressions securely in your browser with live highlighting of all matches. Your regex and test data never leave your device.
/g/
Flags:
3 matches
Send results to alice@example.com and bob@test.org
Contact: support@company.co.uk
Match details
#1
alice@example.comindex 16#2
bob@test.orgindex 38#3
support@company.co.ukindex 60Patterns saved locally
Pattern works? You can find differences in text blocks, or format code.Code Diff Checker
Test regex without leaving your browser
Regular expressions are powerful but notoriously hard to get right. This tester gives you instant visual feedback — every match highlights in yellow as you type, making it easy to refine your pattern.
Save your regex library
Save frequently used patterns like email validators, URL matchers and phone number formats to your local library. They persist across sessions in localStorage.