Free Email Validator – Check Email Deliverability Instantly
An email validator checks whether an address is correctly formatted and whether its domain actually has a working mail server, so you can spot typos and dead addresses before you send. Paste emails (one per line, or comma-separated). Each one gets checked for valid format plus a real mail-server (MX) lookup. You can remove invalid emails from the list before downloading.
What Is an Email Validator?
An email validator checks a list of email addresses for two things: correct formatting (a real @domain.tld shape), and whether that domain actually has a working mail server able to receive email (its MX record). Together these catch the two most common causes of a bounced or wasted email - a typo in the address, or a domain that can't receive mail at all - before you ever hit send.
| Price | 100% Free |
| Signup | Not required |
| Checks | Address format + live MX (mail server) lookup |
| Output | Downloadable cleaned list of valid emails |
| Best for | Cleaning email lists before an outreach or newsletter send |
How to Validate an Email List
- Paste your emails. One per line, or comma-separated - any amount at once.
- Click Verify Emails. Each address gets checked for format plus a live mail-server lookup.
- Review the results. Every address is marked Valid or Invalid with a plain-language reason.
- Download the cleaned list. Uncheck anything you don't want to keep first.
Why Validate Emails Before Sending?
Sending to a large batch of invalid addresses hurts more than it wastes time - a high bounce rate is one of the strongest signals email providers use to decide whether your future mail lands in the inbox or the spam folder. Validating a list first, especially one collected from a form, an old spreadsheet, or a scrape, keeps your sender reputation clean and your open-rate numbers honest.
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Frequently Asked Questions
Is this email validator free?
Yes - completely free, with no signup required to check a list of emails.
How does it check if an email is real?
Two checks: first the address format is validated, then a live DNS lookup confirms the domain actually has a mail server (MX record) able to receive mail.
Does this guarantee an email inbox actually exists?
No single free tool can guarantee that without sending real mail - an MX record confirms the domain can receive email, which catches typos and dead domains, the most common causes of bounces.
Can I validate a large list at once?
Yes - paste as many addresses as you like, one per line or comma-separated, and every one gets checked in a single pass.
Can I download only the valid emails?
Yes - after checking, uncheck any address you don't want and download a cleaned list containing only the ones you kept.