Paste or upload up to 50,000 email addresses and get back a clean CSV — invalid syntax, dead domains, disposable inboxes, typos and risky role accounts all flagged. Free, no signup.
"Valid" means every available check passed — correct syntax, real domain, not disposable, not a typo, not role-based. Only "Confirmed" was individually proven to exist mailbox-by-mailbox; the rest is the honest ceiling for a free tool without a dedicated verified sending server.
Every address you submit runs through the same checks a paid deliverability service uses, minus the price tag: syntax validation, domain length limits, disposable/temp-mail detection, DNS mail-server (MX) lookup, typo correction against common providers, role-based-account flagging, and a best-effort live mailbox probe where the receiving server allows it.
No free or paid tool can guarantee 100% bounce prediction — many mail providers (Gmail, Outlook, most corporate servers) don't reveal whether a specific mailbox exists until you actually send to it, and greylisting/catch-all configurations hide the answer even from paid verification APIs. What this tool does guarantee: every address with bad syntax, a dead domain, a disposable-mail domain, a placeholder username, or an obvious typo will be caught and removed from your "Valid" count.
Your uploaded list is processed on our server and automatically deleted within 24 hours. It isn't shared, sold, or used for anything other than producing your results file.