Regular Expression Tester

Test and debug regex patterns with live matching and group visualization

Regex Pattern & Test Data

Enter your regular expression pattern and test string

Common Patterns

Load popular regex patterns to get started

Regex Quick Reference

. - Any character

* - 0 or more

+ - 1 or more

? - 0 or 1

^ - Start of string

$ - End of string

\d - Digit [0-9]

\w - Word [A-Za-z0-9_]

\s - Whitespace

[abc] - Any of a, b, c

[a-z] - Range a to z

[^abc] - Not a, b, or c

Tip: Use parentheses () to create capture groups, and (?:) for non-capturing groups. Named groups can be created with (?<name>pattern).

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