Email Validator
Check whether an email address is correctly formatted.
About this tool
Check whether an email address is correctly formatted according to standard rules — this checks format only, not whether the address actually exists or can receive mail.
Key Features
- Checks structural format against standard rules
- Flags common mistakes like missing @ or domain
- Shows the local part and domain separately
- Instant, private check in your browser
How to Use
- Enter an email address.
- Click Check.
- See whether the format is valid, and why if it is not.
Benefits
- Catch a typo before sending an important email
- Validate user input while building a form
- Understand what makes an email address correctly formatted
Frequently Asked Questions
No. This only checks that the address is structurally well-formed — it cannot tell you whether that mailbox actually exists, belongs to a real person, or is currently able to receive mail. Confirming an address truly works requires either sending a message or using a dedicated verification service that checks with the receiving mail server.
At minimum: a local part (before the @) containing valid characters, exactly one @ symbol, and a domain (after the @) containing at least one dot with valid characters on both sides, like name@example.com. The full official email format specification (RFC 5322) technically allows some unusual edge cases beyond this, like quoted strings, which are rarely seen in practice and are treated as invalid here for simplicity.
Some legitimate but unusual formats — such as addresses with quoted local parts or certain rare special characters — fall outside the practical, commonly-used pattern this tool checks against. If your everyday email client accepts an address that this tool flags, your address is very likely still fine to use.