Email Validator
Check whether email addresses are correctly formatted and organize a list by valid and invalid entries. It catches typos and malformed addresses before you send.
What validation can and cannot tell you
There are two very different questions about an email address: is it formatted correctly, and does it actually exist. This tool checks format - that there is a single @, a domain, a valid structure - which catches the most common problems like a missing @ or a typo'd domain.
It cannot confirm the mailbox is real and active without sending something to it. So a valid-format address may still bounce. Format validation reduces obvious errors; only a confirmation email proves deliverability.
Cleaning a list
Use it as a first filter before a campaign or import.
- Catch and fix typos like 'gmial.com' before they bounce.
- Separate clearly malformed addresses from plausible ones.
- Follow up with a confirmation step for addresses that must be deliverable.
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FAQs
Does it check if the email actually exists?▼
No. It validates the format and structure, not whether the mailbox is real and active. A correctly formatted address can still bounce; only sending to it confirms it works.
What kinds of errors does it catch?▼
Structural problems: a missing or doubled @, no domain, illegal characters, or obvious domain typos. These are the most common causes of failed sends.
Is my email list uploaded?▼
No. Validation runs in your browser, so your list of addresses stays on your device.
Can a valid-format email still be wrong?▼
Yes. 'john@gmial.com' is validly formatted but the domain is misspelled. Format checks cannot catch every real-world mistake, only structural ones.
Are plus-aliases (like name+tag@gmail.com) valid?▼
Yes. The plus sign is allowed in the local part, and many providers route such aliases to the main inbox. The validator treats them as valid.
What is the safest way to confirm an address works?▼
Send a confirmation or verification email and require the recipient to act on it. This is the only reliable proof that an address is real and monitored.
Does it handle international domain names?▼
Modern email addresses can include international characters. Basic validation focuses on standard structure; unusual internationalized addresses may need specialized checks.
Can it remove duplicates from my list too?▼
Validation focuses on format. To remove repeated addresses, run the list through a duplicate remover as a separate step.
Why do some valid addresses get flagged?▼
Very unusual but technically legal formats can trip simple validators. If you are sure an address is correct, trust a confirmation email over a strict format rule.
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