Online Regex Tester for Developers
Test and debug regex with our Regex Tester. Supports JavaScript, Python, and PHP. Features syntax highlighting, real-time feedback, and an intuitive interface.
Match Results
Common Patterns
Quick Reference
^: Start of line\n$: End of line\n\b: Word boundary\n\B: Not word boundary\d: Digit [0-9]\n\w: Word [A-Za-z0-9_]\n\s: Whitespace\n.: Any character except newlineAbout Regular Expressions
Regular expressions (regex) are powerful text pattern matching and manipulation tools used in programming, text processing, and data validation.
Common Use Cases:
- Form validation (emails, phones, passwords)
- Data extraction and parsing
- Search and replace operations
- Text processing and formatting
- Input validation and sanitization
