Email Validator
Check whether an email address follows a valid syntax, live as you type.
Valid format—
Local part—
Domain—
This checks syntax only — it cannot confirm the mailbox actually exists or accepts mail.
This validator checks general email syntax rules (one @, a valid domain with a dot, no invalid characters) — it does not, and cannot, verify that the mailbox actually exists.
Frequently asked questions
How do I check if an email address is valid online?
Type the email address into the input box — the format is checked live, and the local part and domain are shown separately.
Can this tool tell me if the email actually exists?
No — checking whether a mailbox is real and accepts mail requires actually sending it a message or querying the mail server; this tool only validates syntax.