Regex Tester
Test regular expressions with live highlighting.
How to use the Regex Tester
- Type your pattern
And tick the flags you need: g, i, m, s, u.
- Paste some text
Matches are highlighted as you type.
- Check the groups
Every match and capture group is listed; try a replacement too.
Questions
Is it really free, with no sign-up?
Yes, completely. There's no sign-up, no login and no daily limit: just open the page and start. It works in your browser on any computer, phone or tablet with nothing to install, and your files are never uploaded — everything happens on your device.
Which regex flavour is this?
JavaScript (ECMAScript), the one used in browsers and Node.js — very close to PCRE for everyday patterns.
Is my data sent anywhere?
No. Everything runs in your browser, on your device — nothing you paste or open is uploaded.