Email Regex Tester
Test email validation regex patterns against a list of email addresses. Choose from preset patterns or write your own. See which emails match and which fail.
About this tool
Email validation regex is one of the most commonly needed patterns in web development, yet it is surprisingly difficult to get right. The official RFC 5322 spec allows characters that most people would not expect in an email address. This tool lets you test different regex patterns against a diverse set of test emails to find the right balance between strictness and permissiveness. Once you have validated your email addresses with regex, use our email validator for deeper DNS and MX record checks, and our disposable email checker to filter throwaway addresses.
Frequently Asked Questions
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