Pattern
Test String
Guide
Basic Usage
Learn how to use regular expressions effectively with our tester.
Common Patterns
- Simple Text - Match exact text or words
- Email - Validate email addresses
- Phone Numbers - Match various phone number formats
- Dates - Match date formats (YYYY-MM-DD, MM/DD/YYYY)
- URLs - Match web addresses and domains
- Passwords - Validate password requirements
Regex Flags
- g (Global) - Find all matches rather than stopping at first match
- m (Multiline) - ^ and $ match start/end of each line
- i (Case Insensitive) - Match regardless of case
- u (Unicode) - Enable full Unicode matching
- y (Sticky) - Match only from lastIndex
- s (Dot All) - Dot matches newlines too
Features
Available Features
- Real-time pattern testing and validation
- Detailed pattern breakdown and explanation
- Library of common regex patterns
- Visual match highlighting in test string
- Detailed match information including groups
- Support for all JavaScript regex flags
Tips & Best Practices
Usage Tips
- Start with simple patterns and build up complexity
- Test your regex against multiple test cases
- Use appropriate flags for your use case
- Remember to escape special characters (., *, +, etc.)
- Use capturing groups to extract specific parts of matches
Note: Regular expressions are powerful but can be complex. Test thoroughly before using in production.
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