Testing regex: frequently asked questions
Straight answers to the questions people ask most.
Is it really free?
Yes. There is no paywall, no trial, no watermark, and no usage cap. Open Regex Tester and use it as often as you like.
Does it store or upload my data?
No. Everything runs locally in your browser, and your patterns and text aren't sent anywhere.
Do I need to install anything?
No installation, no plugins, no extensions. A current browser is all you need.
Do regex flags work here?
Yes. You can use flags like global, case-insensitive, and multiline.
Can I test find-and-replace?
Yes. Replace mode lets you verify substitutions before using the pattern in code.
Does it work on my phone?
Yes. The tool adapts to any screen, so it works on phones, tablets, laptops, and desktops.
Verdict
Testing regex is free, private, unlimited, and cross-device. Start at Regex Tester.