Email Validator – Check Syntax & Domain for Emails
Validate email format, domain, disposable status, and deliverability hints for user signups or marketing lists without leaving the browser.
Email Validator
Validate email addresses with RFC 5322 compliance checking
Enter email address to validate
Or drag and drop a file
Validation result will appear here
lightbulbPopular Use Cases
Validate user email addresses in registration and contact forms before submission
Validate bulk email lists to remove invalid addresses and improve deliverability
Verify email addresses in customer databases to maintain data integrity
Validate email format before creating user accounts and sending verification emails
scienceExample Email Addresses
user@example.com
contact@mail.company.com
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› About this tool · FAQ
Stop sending emails to invalid addresses! Validate email syntax instantly with comprehensive checking for format errors, domain verification, and deliverability insights. Supports international domains and disposable email detection. Free, works offline, unlimited validations.
How do I validate an email address?
Enter the email address into the validator, configure options (international domains, disposable email detection, strict mode), and click Validate. The tool instantly checks syntax, format, domain structure, and provides detailed validation results with suggestions.
Is this email validator free?
Yes, completely free with unlimited validations. No signup required, no watermarks. All validation happens in your browser for complete privacy and unlimited email checking.
Are email addresses uploaded to servers?
No, all email validation happens locally in your browser. Email addresses never leave your computer, ensuring complete privacy for user data and contact lists.
What makes an email address valid?
A valid email has a local part (before @), an @ symbol, and a domain part (after @). The local part can contain letters, numbers, dots, hyphens, and some special characters. The domain must have a valid format and ideally exist.
Does this tool check if the email actually exists?
This tool performs syntax validation and basic domain checks. For deliverability verification, you would need additional services that can perform SMTP checks to confirm if the mailbox exists.
Are international email addresses supported?
Yes, this validator supports internationalized domain names (IDN) and Unicode characters in domains when international mode is enabled, allowing validation of non-ASCII email addresses.
What are disposable email addresses?
Disposable emails are temporary addresses from services like 10minutemail. When enabled, this tool can help identify such addresses based on known disposable email domains for better list quality.
How accurate is the domain validation?
The tool checks domain format and basic DNS existence. However, a domain existing doesn't guarantee the specific email address is valid - that requires deeper SMTP verification services.