Regex Tester
Test regular expressions against sample text and see live matches and groups. Regex Tester is free, needs no login or signup, and your text is processed in your browser — it is never uploaded.
Key features
- Tests your pattern against sample text as you type, with live matches.
- Shows match groups so you can see exactly what each part captured.
- Free to use, with no login or signup required.
- Your text is processed in your browser and never uploaded.
How to use
- Open the Regex Tester tool.
- Type or paste your regular expression and your sample text.
- Check the live matches and groups.
- Adjust your pattern until it matches what you want.
Frequently asked questions
Do I need an account to test a regular expression?
No. The tool is free and needs no login or signup.
Is my text uploaded or stored?
No. Your text is processed in your browser on your own device, and it is never uploaded to or stored by the site.
What are match groups?
Groups are the parts of a match captured by parentheses in your pattern — the tester shows them so you can check each part.