Email Address Validator

Check local-part/domain syntax, Unicode use, ASCII domain normalization, and byte-length warnings in the browser; no DNS, MX, SMTP, or delivery test is performed.

Email addressAllow internationalized local parts (SMTPUTF8 syntax mode)

ReadyNo network request is made.

—Local part

—Domain

—ASCII domain

—Address bytes

These tools work locally on text. Syntax validation is not mailbox verification: no DNS/MX lookup, SMTP connection, account-existence check, or deliverability test is performed.

How to use this Email Address Validator

Validate the syntax and structure of an email addr-spec locally without pretending to verify mailbox existence. Enter your values above and the result is calculated directly in your browser. No account is required.

Fast answer, clear inputs

This tool is built around one job: give the answer quickly without forcing a signup or hiding the result. Related tools are linked nearby when the next calculation or conversion is useful.