Regex Tester
Test and validate regular expressions
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Highlighted Text
Common Patterns
Regex Tips
• Use \b for word boundaries to match whole words only
• ? makes quantifiers non-greedy (match as few characters as possible)
• Use parentheses () to create capturing groups for extracting parts of matches
• (?:...) creates non-capturing groups for grouping without capturing
• ^ and $ match start and end of string (or line with 'm' flag)
• Test your regex thoroughly with various inputs to avoid false positives
Professional Regex Tester Tool
Test and debug regular expressions with our comprehensive regex tester tool. Perfect for developers, data analysts, and anyone working with pattern matching. Our tool provides real-time testing, detailed match information, syntax explanation, and a library of common regex patterns.
Key Features
- Real-time regex testing with instant feedback
- Visual highlighting of matches in test string
- Detailed match information with groups and positions
- Support for all JavaScript regex flags
- Pattern explanation and syntax breakdown
- Library of common regex patterns
- Error handling and validation
- Copy functionality for matches and patterns
- Responsive design for all devices
- Educational tooltips and explanations
Perfect For
- Software developers testing regex patterns
- Data analysts validating data formats
- Web developers implementing form validation
- System administrators parsing log files
- Students learning regular expressions
- QA engineers creating test patterns
- Content creators extracting information from text
- Anyone needing pattern matching and text processing
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