Question 1

What do the regex flags mean?

Accepted Answer

g (global) finds all matches instead of stopping at the first. i ignores case. m makes ^ and $ match the start/end of each line. s lets . match newlines. u enables full Unicode mode. y matches only from the current position (sticky).

Question 2

Does this use JavaScript regex syntax?

Accepted Answer

Yes — this tool runs entirely in your browser using JavaScript's native RegExp engine, so patterns behave exactly as they would in your own JS/TypeScript code.

Question 3

Is my text sent to a server?

Accepted Answer

No. Matching runs locally in your browser — your pattern and test string never leave your device.

Regex Tester (Test regular expressions against text — see highlighted matches and capture groups)

Regex Tester (Test regular expressions against text — see highlighted matches and capture groups)