Regex Tester

Test and debug regular expressions with real-time matching, capture groups analysis, and a library of common patterns.

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Common Patterns

Sample Test Strings

Results

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Enter a regular expression pattern to start testing

Flag Reference

g - Global: find all matches
i - Ignore case: case-insensitive matching
m - Multiline: ^ and $ match line boundaries
s - Dot all: . matches newlines
u - Unicode: full unicode support
y - Sticky: match at exact position