Regex Tester
Test regular expressions with live matching, groups, and common patterns
Regular Expression
Find all matches instead of just the first
Match both upper and lowercase letters
Treat ^ and $ as start/end of each line
Allow . to match newline characters
Enable full Unicode support
Match only from lastIndex position
Test String
Enter a pattern and test string to see matches
Common Patterns
Click any pattern to load it into the tester
Regex Cheatsheet
About Regular Expressions
Regular expressions (regex) are powerful patterns used to match, search, and manipulate text. This regex tester provides real-time pattern matching with visual highlighting, making it easy to test and debug your regular expressions before using them in code.
Test your patterns with all standard regex flags including global (g), case-insensitive (i), multiline (m), dotall (s), unicode (u), and sticky (y). See instant visual feedback with color-coded matches and detailed information about capture groups, positions, and match counts.
Whether you're validating email addresses, parsing URLs, extracting data, or building complex search patterns, this tool helps you test and refine your regular expressions with a comprehensive library of common patterns and a detailed cheatsheet covering character classes, quantifiers, anchors, groups, and lookaheads.
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