Free Regex Tester
Write a regular expression and see every match highlighted in your test text, with capture groups listed.
- 100% free
- No limits
- No upload
- No watermark
- Works on mobile
How to use the Regex Tester
- 1
Enter a pattern
Type your regex and flags.
- 2
Add test text
Matches are highlighted live.
Why use Qu-Outil's Regex Tester
Fast, private and free — with no limits.
Capture groups
See each match and its groups.
Instant and private
Everything happens in your browser as you type. Your text is never sent to a server.
Free and unlimited
No sign-up, no limits and no ads in the way. Use it as often as you like.
Works on any device
Fully responsive — works the same on a phone, tablet or computer.
Regex Tester — frequently asked questions
Which regex flavour is used?
JavaScript (ECMAScript) regular expressions, as used in browsers and Node.js.
Is it free?
Yes — free with no sign-up and no limits.
Is my text stored or uploaded?
No. Everything runs in your browser; nothing you type is sent to a server or saved.
Help keep Qu-Outil free
I build and run these tools in my free time and keep them free for everyone — no ads, no sign-up. If they helped you, buy me a chai or coffee via Google Pay or any UPI app. Your support keeps me building more free tools. Completely optional.
samarthdalela@oksbiThe button opens Google Pay, PhonePe or Paytm on your phone. On desktop, scan the QR.
Scan to pay ₹50
Works with any UPI app