Email Validator
An email validator checks whether an address follows correct email syntax — local part, "@", and a domain with a valid top-level label — and explains specifically what is wrong when it isn’t, rather than just a pass/fail. The official email grammar, RFC 5322, technically permits addresses most mail providers do not actually support in practice, like quoted local parts or bracketed IP-address domains, so this validator intentionally checks the practical, real-world subset of the spec rather than the full formal grammar, matching what a typical signup form would accept.
How it works
- Enter an email address.
- Read whether the format is valid, and specifically why not if it isn’t.
Formula Format checks: single "@", valid local-part characters, domain with a dotted, letter-led top-level label
Frequently asked questions
Does "valid format" mean the email actually receives mail?
No. This checks syntax only — no client-side tool can confirm a mailbox exists or accepts mail without actually sending a message.
Why did a real address I use every day fail?
Practical email validators (including this one) check common, sane formatting rather than the full official grammar, which technically allows unusual addresses (quoted strings, IP-literal domains) almost nobody actually uses.
Does this check for disposable or fake email domains?
No — it checks structure only, not whether the domain is a known disposable-email provider.
Is my email address sent anywhere?
No. Validation runs entirely in your browser.
Does this support internationalized (Unicode) email addresses?
No — the local part and domain are checked against ASCII letters, digits, and standard punctuation only. A Unicode local part or an internationalized (non-Latin) domain will be flagged as invalid characters even if a mail provider actually accepts it.