Kwiklr

Regex Tester

Test and debug regular expressions with live match highlighting, capture groups and flags. Runs locally in your browser.

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Test regular expressions instantly

Type a pattern and some test text and see every match highlighted live, along with capture groups for each match. Toggle the common flags โ€” global, case-insensitive, multiline and dotall โ€” and get clear error messages when a pattern is invalid. Everything runs locally in your browser, so nothing is sent anywhere.