Regular Expression Tester
Test, validate, and learn regular expressions with real-time pattern matching
Regular Expression
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Test Results
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Pattern Explanation
Enter a regex pattern to see its explanation here...
Find & Replace
Common Patterns
Character Classes
\d - Digits (0-9)\w - Word characters (a-z, A-Z, 0-9, _)\s - Whitespace characters. - Any character (except newline)Quantifiers
* - Zero or more+ - One or more? - Zero or one{n,m} - Between n and mAnchors
^ - Start of string$ - End of string\b - Word boundaryCommon Use Cases
Email Validation
Validate email address format
^[^\s@]+@[^\s@]+\.[^\s@]+$
Phone Numbers
Match various phone formats
^\+?[\d\s\-\(\)]{10,}$
Password Strength
At least 8 chars with mixed case
^(?=.*[a-z])(?=.*[A-Z])(?=.*\d).{8,}$
URL Extraction
Find URLs in text
https?:\/\/[^\s]+
Features
- 🎯 Real-time regex pattern testing
- 🔍 Visual match highlighting
- 📝 Pattern explanation and breakdown
- 🔄 Find and replace functionality
- 📚 Common regex pattern library
- 🏷️ Capture group visualization
Use Cases
- ✅ Form validation patterns
- 🔍 Text parsing and extraction
- 📧 Email and URL validation
- 🔐 Password strength checking
- 📞 Phone number formatting
- 🎓 Learning regular expressions
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