Regex Tester
Type a regular expression and see the matches in your text highlighted instantly, with capture groups listed.
Regex Tester
Type a regular expression and see the matches in your text highlighted instantly, with capture groups listed.
About this tool
Privacy
What you enter is calculated on this device and never sent to a server.
How to use
- Enter numbers or paste text in the box above, and pick any options you need.
- The result appears right away. Generators (UUID, password) make a new one each time you press the button.
- Copy the result and paste it wherever you need it.
Frequently asked questions
Which regex flavor does it use?
JavaScript regular expressions, with flags such as g, i and m. Matches are highlighted as you type, and syntax errors are reported.
Is the Regex Tester free?
Yes. It is free with no sign-up, no install and no usage limit. It runs right in your browser.
Is what I enter sent to a server?
No. Everything is calculated on your device, and nothing you type is sent or stored. Only the currency converter downloads the latest exchange rates.
Does it work on a phone?
Yes. It works in any modern browser on phones, tablets and computers, so there is no app to install.