Regex
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About Regex
Test regular expressions online with live match highlighting. Debug capture groups and flags as you type. Free regex tester, runs in your browser.
Is everything free?
Yes. All tools, games and demos on Tu-X are free to use. The site is supported by non-intrusive ads.
Do my data and files leave my device?
Most tools run entirely in your browser — your text, images and files never leave your device. See our Privacy Policy for details on each product.
Do I need an account?
No. Every product works instantly, with no sign-up required.