Free tools
Read what a domain says about itself
Every one of these reads public records and answers in a few seconds. No account, no email address, and nothing about the domain you type is stored.
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DMARC checker
Look up a domain's DMARC record and read what it actually tells receiving servers to do.
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SPF checker and lookup counter
Read a domain's SPF record and count its DNS lookups against the limit of ten.
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SSL certificate checker
Check when a certificate expires, who issued it, and whether it covers the hostname.
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HTTP status code checker
See what status code a domain returns, whether it forces HTTPS, and which security headers it sends.
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Domain expiry checker
Find out when a domain expires, who it is registered with, and whether the transfer lock is on.
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DNS and CAA checker
Read a domain's CAA records, and check the zone's nameservers against the registry's.
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Or run every check at once
Certificate, registration, mail records and indexing rules for one domain, read in a few seconds.
Ten sites free, for real work
No card, no trial timer, and every check on every plan. Create an account, add your first site, and see what it finds.