Generate a regular expression
Pick from a library of common regular expressions (email, URL, phone number, dates, and more), each with a plain-English description and a live test against your own text.
Matches most standard email addresses.
[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}/Contact, web, dates, numbers, or text.
Each one comes with a plain-English description and a ready-to-use regular expression.
Try it against your own text right away, then copy the pattern.
Frequently asked
Is this an AI-generated regex?
No. Every pattern here is a hand-written, well-established regular expression for a common need, not machine-generated. That's what keeps it reliable and fully offline.
Is my text sent anywhere?
No. Everything, including the live match testing, runs in this tab. Nothing is sent anywhere.
Can I fine-tune a pattern further?
Copy it into the Regex Tester tool for full control over flags, capture groups, and more detailed match inspection.
Are these patterns perfect?
They cover the common, practical cases well (e.g. the email pattern matches the vast majority of real addresses), but truly exhaustive validation per format (full RFC 5322 emails, Luhn-checked card numbers, etc.) needs more than a single regular expression can reasonably do.
Does this work offline?
Yes, once the page has loaded.