Email Validator
Check whether an email address is correctly formatted: valid syntax, length limits, domain labels, disposable and role flags, and typo suggestions. Validate one address or a whole list. Everything runs in your browser — your data is never sent anywhere and nothing is stored.
| Status | Reason |
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Format only. This tool checks that an address is written correctly. It does not verify that the mailbox exists or can receive mail — that needs a server (DNS/MX and SMTP checks).
How to use the email validator
- Choose Single to check one address or Bulk to check a whole list.
- In Single mode, type an address and read the PASS/FAIL verdict with the reasons; accept a typo suggestion if one is offered.
- In Bulk mode, paste one address per line, validate, review the table and counts, then copy valid only.
A valid address has the shape local-part@domain: the local part is up to 64 characters,
the whole address up to 254, the domain is made of dot-separated labels (letters, digits and hyphens)
ending in a top-level domain such as .com, and there are no leading, trailing or
consecutive dots on either side of the @.
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Frequently asked questions
What does this email validator check?
It checks the format (syntax) of an email address: that it has one @, a valid local part and domain, correct length limits, no leading, trailing or consecutive dots, properly formed domain labels and a real-looking top-level domain. It also flags disposable and role addresses and suggests fixes for common typos.
Does it confirm the mailbox actually exists?
No. This tool validates format only. Confirming that a mailbox exists and can receive mail requires a server to perform DNS/MX and SMTP checks, which cannot be done safely from a browser. A correctly formatted address can still be undeliverable.
Is my data sent anywhere?
No. All validation runs entirely in your browser — nothing is uploaded to a server and nothing is stored. You can paste a long list of addresses without them leaving your device.
What is a disposable or role email?
A disposable address uses a throwaway domain such as mailinator.com or a temp-mail service and is often abandoned minutes later. A role address such as admin@, info@ or support@ points to a function rather than a person. Both are valid formats but are frequently filtered for sign-ups and marketing.
Why does it suggest a different domain?
When the domain looks like a misspelling of a popular provider — for example gmial.com, hotnail.com or yaho.com — the tool compares it to a small list of common domains using edit distance and suggests the likely intended one. The suggestion is a hint; the original is not changed.
How many emails can the bulk mode handle?
Paste one address per line. Because everything runs locally, it comfortably handles hundreds to a few thousand lines; very large lists simply take a moment longer. Each line is marked valid or invalid with the reason, and you can copy only the valid ones.