Free tools
Free tools for people who send email
Each one runs the real thing, not a demo. The verifier, the domain-auth checker, the MX lookup, the role-address checker 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, a quality score and the reason behind most verdicts. Three a day from one network, no account.
Open - No account
DMARC, SPF and DKIM checker
Read a domain’s email authentication records live from public DNS: the SPF record with its include chain expanded and lookup cost counted, DKIM keys at the common selectors, the DMARC policy and the mail exchangers, with what needs fixing in plain English. The lookup runs in your browser; the domain never reaches Kawaa.
Open - No account
MX lookup
See where a domain’s email goes: its MX records in the order senders try them, the IPv4 and IPv6 addresses of up to ten mail servers and their provider, with null MX, implicit MX, aliases and dead hosts explained. It runs in your browser; the domain never reaches Kawaa.
Open - No account
Role-based email checker
Check whether an address is a role account such as info@ or sales@, by the rule Kawaa’s verifier uses, and browse all 325 entries on its list. It runs in your browser; nothing you type is sent.
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