Regex Tester

Enter a regular expression pattern and test it against a string to see highlighted match results.

Regex Pattern

Flags

g (Global) i (Case insensitive) m (Multiline)

Test String

How to Use the Regex Tester

Enter a regular expression pattern and a test string, then click "Run Test" to see the match results.

Flag Descriptions

g (Global): Searches for all matches. When disabled, only the first match is returned.
i (Case insensitive): Matches without distinguishing between uppercase and lowercase letters.
m (Multiline): Makes ^ and $ match the start and end of each line.

Common Pattern Examples

\d+ : One or more digits
[a-zA-Z]+ : One or more letters
\d{3}-\d{4} : Postal code format (e.g. 123-4567)
[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,} : Email address