Regex Tester

Test and debug regular expressions with live match highlighting and capture group display.

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Frequently asked questions

Which regex flavour does this use?
This tool uses JavaScript regex, which follows the ECMAScript standard. It is compatible with most languages but may differ slightly from PCRE (PHP/Python) in edge cases.
What flags are supported?
g (global), i (case-insensitive), m (multiline), s (dotAll), u (unicode).