🧩 Regex Tester
Type a pattern and text; matches are highlighted in place and groups are listed below.
Common patterns
\d+one or more digits^\S+@\S+\.\S+$a simple email check\b\d{4}-\d{2}-\d{2}\ban ISO date
Frequently asked questions
Which regex flavour is used?
The browser's JavaScript (ECMAScript) regex engine.
What does the g flag do?
It finds every match in the text, not just the first.