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.
Basic format check. Allows most valid emails.
user@example.comjohn.doe@company.co.ukjane+tag@gmail.comadmin@localhost@missing-local.comno-at-signuser@.invalidtest@mailinator.comname@sub.domain.example.comuser@123.123.123.123"quoted"@example.comuser@-invalid.coma@b.cLike this tool? Try Sequenzy for free
AI-powered email marketing with Stripe integration, automations, and built-in analytics.
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
More Free Tools
View all toolsEmail Frequency Calculator
Find the optimal email sending frequency for your audience. Get personalized recommendations based on your industry, list size, engagement rates, and content capacity with projected impact metrics.
Email Header Analyzer
Analyze email headers to trace routing, check authentication (SPF, DKIM, DMARC), identify delivery delays, and debug email issues. Paste headers from any email client.
Email List Growth Calculator
Project your email list size over time accounting for new subscribers and churn. Plan your growth strategy with month-by-month projections and find your list's equilibrium point.
BIMI Record Checker
Check if a domain has BIMI (Brand Indicators for Message Identification) configured. BIMI displays your brand logo next to emails in supported inboxes like Gmail and Apple Mail.