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Regex Tester
Test JavaScript regular expressions with flags and match details locally.
In-browser processing
What Regex Tester does
Test JavaScript regular expressions with flags and match details locally. The focused controls on this page help you complete the task without installing software or creating an account.
How to use Regex Tester
- Type or paste the content you want to work with.
- Run the tool and review the result for the intended use.
- Copy, save, or download the result where that option is available.
Private browser processing
This utility runs in your browser. Toolbox does not send its inputs to the server. Saved state is used only where the tool clearly says so.
Tips for reliable results
Results are produced by browser APIs; always validate security-sensitive output in the context of the system where you will use it.
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