Regex tester
Tests a regular expression against sample text live.
- Free
- No sign-up needed to try
- Runs in your browser
Sign in to use this tool
Regex tester is free once you're signed in — one quick account unlocks every tool on Alux Tools, no payment, ever.
How this works
Your pattern and flags build a live RegExp, and every match in the sample text is highlighted as you type.
Nothing you paste leaves this page.
Frequently asked questions
Is the regex tester free?
Yes. Regex tester is free to use, with no software to install and no hidden fees.
Is my data uploaded anywhere?
No. This tool runs entirely in your browser, so what you enter or select never leaves your device.
Does it work on phones and tablets?
Yes. It works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux.