Results are provided for informational purposes only and may contain errors. Please verify important information independently. Use of this tool is at your own risk.
What the Email Validator does
The Email Validator checks whether an address is written in a valid format. It runs four checks and shows each one: the address contains exactly one @, there is a local part before it, the domain after it contains a dot that is not at the start or end, and there are no spaces. If all four pass and the overall pattern matches, the result is Valid format.
This is a syntax check, the same kind a sign-up form performs before submitting. It does not contact the mail server, so it cannot tell whether the mailbox exists or accepts mail. For that you need to send a confirmation email. The check runs as you type, in your browser, and the address is not sent anywhere.
When to use it
- Finding why a sign-up form rejects an address a user insists is correct.
- Spotting typos such as a missing dot in the domain before importing a mailing list.
- Checking test data for form validation in a new application.
- Explaining to a support customer which part of their address is malformed.
Worked example
name@example.com
Valid format ✓ Contains exactly one @ ✓ Has a local part before @ ✓ Has a domain with a dot ✓ No spaces
ana@example
Invalid format ✓ Contains exactly one @ ✓ Has a local part before @ ✗ Has a domain with a dot ✓ No spaces
Common questions about the Email Validator
Does a valid format mean the email address exists?
No. Only the receiving mail server knows whether a mailbox exists, and many servers will not say. The reliable way to confirm an address is to send a message with a confirmation link.
Why is user@localhost marked invalid?
It is technically allowed on private networks, but public addresses always have a domain with a dot, so almost every form rejects it. The validator follows that practical rule.
Are plus signs and dots allowed before the @?
Yes. first.last+news@example.com is valid. Many providers treat everything after + as a label for filtering, so the mail still reaches first.last@example.com.
Does it accept international domains?
Yes, non-ASCII characters are allowed in both parts. Whether a particular mail server accepts them is a separate question; older systems may need the domain in its punycode form (xn--...).
Is this tool free?
Yes, it's free to use. No signup, no email required. Get results on this page.
How do I get my result?
Use the tool on this page. Your result appears here; no email delivery is required.