Regex Tester
Test and debug regular expressions with real-time highlighting
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About Regex Tester
Our Regex Tester tool helps you test and debug regular expressions with real-time highlighting. It's perfect for developers who need to work with regex patterns for validation, text extraction, or search and replace operations.
Regular expressions (regex) are powerful patterns used to match character combinations in strings. They are widely used in programming for input validation, text processing, and data extraction.
With our tool, you can:
- Test regex patterns against your text in real-time
- See all matches with their positions and captured groups
- Highlight matches in the original text
- Perform search and replace operations
- Toggle different regex flags (g, i, m, s, u, y)
- Copy results to clipboard
Common Regex Patterns
Email Address
/^[\w-\.]+@([\w-]+\.)+[\w-]4$/Matches standard email addresses.
URL
/https?:\/\/(www\.)?[-a-zA-Z0-9@:%._\+~#=]256\.[a-zA-Z0-9()]6\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)/Matches URLs with or without http/https.
Phone Number (US)
/^(\+\d2\s)?$$?\d3$$?[\s.-]\d3[\s.-]\d4$/Matches US phone numbers in various formats.
Date (YYYY-MM-DD)
/^\d4-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])$/Matches dates in YYYY-MM-DD format.