Email Checker
Validate email format, detect typos, spot disposable providers, and flag role-based addresses — instantly in your browser.
Enter Email Address
What we check
- - RFC 5322 format compliance
- - Common domain typos (gmial → gmail)
- - Disposable / temporary email providers
- - Role-based addresses (info@, admin@)
- - Local part and domain length limits
- - Suspicious dot placement
- - Top-level domain validity
Enter an email address and click "Check Email" to validate.
Free email address checker
Bad email addresses cost real money. Every bounce hurts your sender reputation, and disposable sign-ups waste onboarding resources. This free email checker catches problems before they reach your mailing list — running entirely in your browser with zero server calls.
What the checker validates
The tool runs nine checks against each address you enter:
- RFC 5322 format — the gold standard for email syntax compliance.
- Local part length — must not exceed 64 characters per RFC 5321.
- Domain length — DNS limits domains to 253 characters.
- Domain typo detection — catches misspellings of major providers like Gmail, Yahoo, Hotmail, Outlook, and iCloud.
- Disposable provider check — flags 35+ known temporary email services (Mailinator, Guerrilla Mail, Yopmail, etc.).
- Provider type — identifies whether the domain is a free provider or a custom/business domain.
- Role-based address — flags shared inboxes like info@, admin@, and support@ that tend to have lower engagement.
- Dot placement — catches leading, trailing, or consecutive dots that may cause delivery issues.
- TLD validity — ensures the top-level domain is plausible.
When to use this tool
- Before importing a contact list into your CRM or email marketing platform
- During user registration form design — add client-side validation
- When reviewing a sign-up CSV to filter out disposable addresses
- To quickly check a single address before sending an important email
Limitations
This tool validates syntax and patterns. It cannot confirm that a mailbox actually exists, because that requires an SMTP handshake with the recipient server — something browsers cannot do. For full deliverability verification, pair this tool with a server-side verification API.
Does this tool send my email to a server?
No. Every check runs locally in your browser using JavaScript. Your email address is never transmitted anywhere.
What does the email checker validate?
It validates RFC 5322 format compliance, detects common domain typos (like gmial.com), flags disposable/temporary email providers, identifies role-based addresses (info@, admin@), and checks for unusual length or characters.
Can this tool verify if an email actually exists?
No. Verifying delivery requires sending SMTP requests to the mail server, which cannot be done from a browser. This tool catches formatting errors, typos, and risky patterns before you attempt delivery.
What is a disposable email address?
Disposable (or temporary) emails are from services like Guerrilla Mail or Tempmail that provide short-lived inboxes. They are commonly used to bypass sign-up forms and are risky for transactional email.