Regex tester
Write a regular expression and see every match and group highlighted live, with flags and a replace preview.
Flags
Matches
Result
Questions
Is it safe to paste tokens or data here?
Yes. These tools run entirely in your browser with no server calls, so what you paste is never sent anywhere. Still, treat production secrets with care and rotate any key you have shared.
Do the tools work offline?
Once a page has loaded, the tool keeps working without a connection.
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