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Validate email addresses in bulk. Check syntax, detect disposable domains, flag role-based emails (info@, admin@), find duplicates. Get a health score for your list. No signup, no upload — 100% in your browser.
Free bulk email validator that runs 100% in your browser. Paste your email list and instantly see which addresses are valid, disposable, role-based, or duplicated. Get a list health score to know how clean your data is before you send. Unlike NeverBounce ($8/1000) or ZeroBounce ($16/1000), this tool is completely free with no limits. The trade-off: it validates syntax and domain reputation, not SMTP deliverability. Your email list never leaves your device.
Syntax validation checks if the email format is correct (has an @, valid domain structure, etc.). SMTP verification actually connects to the mail server to ask "does this mailbox exist?" This tool does syntax validation + domain reputation checks (disposable, free, role-based). SMTP verification requires a server and costs money — that's what NeverBounce and ZeroBounce charge for.
Disposable emails (mailinator.com, guerrillamail.com, etc.) are temporary addresses that expire. Sending to them wastes your email credits and hurts your sender reputation. This tool flags them so you can remove them before importing into your email platform.