Email Validator
Check if an email address is valid. Paste one or many addresses to validate format, spot common typos like gmail.con, and see why an email is invalid. Free and private.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Check Email Addresses in Seconds
The email validator checks whether an email address has a valid format and flags common mistakes. Paste a single address or a whole list, and it tells you which are valid and exactly why the others are not — all privately in your browser.
How to Use It
- Paste one email address per line into the box.
- The validator checks them as you type (or tap Validate).
- Each address gets a green tick (valid format) or a red cross with the reason.
- The summary shows how many passed out of the total.
What the Validator Checks
| Check | Example of a failure |
|---|---|
| Exactly one @ | name@@example.com |
| Local part present and not too long | @example.com |
| Domain present with a dot/TLD | name@example |
| No consecutive dots | [email protected] |
| No leading/trailing dots in local part | [email protected] |
| Overall length within limits | extremely long addresses |
| Valid overall format | name@exa mple.com |
It also spots likely typos in popular domains — for example, suggesting gmail.com when you type gmail.con.
Format Validation vs Real Delivery
This tool confirms an address is correctly formatted — that it could be a real email. It does not confirm the mailbox actually exists or can receive mail. Verifying real delivery requires server-side checks (like an SMTP probe or a confirmation email), which cannot be done safely or accurately from a browser.
For most uses — cleaning a signup form, catching a typo before you hit send, or tidying a contact list — format validation catches the vast majority of bad addresses.
Why It Helps
- Catch typos before they cost you a bounced message or a lost lead.
- Clean a list quickly by spotting malformed entries.
- Validate form input logic by testing example addresses.
- Stay private — nothing leaves your browser, so sensitive lists are safe.
Paste your addresses, scan the results, and fix the flagged ones in seconds. It is the fastest way to make sure every email you collect or send is at least in the right shape.
Frequently asked questions
How does the email validator work?+
It checks each address against email format rules: exactly one @ sign, a valid local part and domain, a top-level domain after a dot, no consecutive dots, and correct overall structure. It also flags common domain typos like gmail.con.
Does this confirm the email account actually exists?+
No. This tool validates the format and structure of an address, not whether the mailbox is real or can receive mail. Confirming delivery requires sending mail or a server-side verification service.
Can I validate many email addresses at once?+
Yes. Paste one address per line and the validator checks them all, showing a green tick for valid format or a red cross with the reason for each invalid one, plus a count of how many passed.
What makes an email address invalid?+
Common problems include a missing or extra @ sign, no domain or top-level domain, consecutive dots, leading or trailing dots in the local part, spaces, or an address that is far too long. The tool names the specific issue for each.
Is my email data sent anywhere?+
No. All validation runs entirely in your browser. The addresses you paste are never uploaded or stored, so you can safely check sensitive lists privately.