Runs locally in your browser. Nothing you enter is uploaded to our servers.
Result will appear here
Tips for email validation
Format checks are not proof the mailbox exists.
Allow modern TLDs and plus-addressing when your product needs them.
Normalize case carefully — local-parts can be case-sensitive.
Do not over-restrict valid RFC addresses unless UX requires it.
Confirm delivery with a verification email for sign-up flows.
Email shape, not an inbox probe
Processing stays in your browser — your input is not uploaded to our servers.
This checks whether a string looks like an email (local part, `@`, domain). It does not send mail, ping MX, or prove the mailbox exists.
Use it to catch typos in forms before a real confirmation email goes out.
Validate an email string
Paste the address
The value from the form, including plus-tags if users use them.
Read the result
A pass is syntax. `notanemail` fails; `user@localhost` may pass depending on the rules.
Confirm out-of-band if it matters
Ownership still needs a token email or SSO — this page cannot do that.
Email validator FAQ
Does a green check mean the inbox exists?
No. Only the string format. MX and mailboxes need a server-side check.
Is the address uploaded?
No. Validation is local.
International domains?
Support depends on the pattern. Punycode domains may need conversion first.