Free · No signup · Never uploaded
Free bulk email verifier.Catch bad emails before they bounce.
Paste a list or drop a CSV. Up to 25,000 emails per run.
What it checks
8 checks on every email.
Why this one
No signup. No credits. No upload.
Questions
Good to know.
Is it really free?
Yes. No signup, no credits, no daily cap. Up to 25,000 emails per run, and you can run it as many times as you like.
Do you see my list?
No. Your list is read inside your browser. Only domain names (like acme.com) go to Cloudflare's and Google's public DNS to find the mail server. Full addresses never leave the page.
How accurate is it?
It catches what causes most hard bounces: dead domains, missing mail servers, throwaway inboxes and typos. It can't confirm a single mailbox exists. That needs a server-side SMTP check, and many servers (catch-all domains, security gateways) accept every address and won't give a real answer. For a last step, run the deliverable list through your sending tool's own check.
What does Risky mean?
The email will probably arrive, but something is off: a team inbox, a personal inbox on a B2B list, a likely typo, a forwarding alias, or a domain with no MX record. Send with care or leave it out.
Which files work?
CSV, TSV and TXT. The tool finds the email column on its own and keeps all your other columns in the download. For Excel or Google Sheets, download as CSV first.