Free tools for people who send email
Each one runs the real thing, not a demo. The verifier and the calculator work without an account, the API playground takes a key from a free account, and none of them asks for a credit card.
- No account
Email verifier
Check one address against the live API: syntax, domain, mail server, mailbox and risk signals, with a status and a quality score. Three a day from one network, no account.
Open - Runs in your browser
Bounce cost calculator
Put your list size, bounce rate and sending cost in, and see what the addresses that bounce are costing you a year — and how many sends it takes for a one-off clean to pay for itself.
Open - Needs a free API key
API playground
Build and send a real request to the verification API from the browser, read the response, and copy the equivalent cURL, JavaScript or Python. Every endpoint it offers is authenticated, so it needs an API key from a free account.
Open
Ready for a whole list?
A free account adds 100 verification credits, the CSV upload and an API key. Paid plans start at $19 a month for 5,000 verifications.
No credit card required