Regex Tester

Test and debug regular expressions live

Free · No sign-up · Works on any device

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About Regex Tester

Free online regex tester. Write regular expressions and test them against your string in real time. Supports JavaScript, Python and PCRE syntax.

Frequently Asked Questions

Is Regex Tester free to use?

Yes, Regex Tester is completely free — no subscription, no credit card, no hidden fees. Use it as much as you need.

Do I need to create an account to use Regex Tester?

No account needed. Regex Tester works instantly in your browser. Just open the page and start using it — no email, no login, no sign-up of any kind.

Is Regex Tester safe to use?

Yes. Your data is processed on top-quality cloud infrastructure and never logged or stored. We have no user accounts, so there is nothing to compromise.

Does Regex Tester work on mobile?

Yes. Regex Tester is fully responsive and works on smartphones, tablets and desktops. No app download required.