Free toolDKIM checker.
DKIM checker.
Find the keys, check them.
Finds a domain's DKIM public keys on your selector or 30 common ones, and checks each key's size and settings.
No account required to use this tool.
New to DKIM? Read how DKIM records work. Add this checker to your site
More free domain tools
WHOIS lookup
See a domain's registrar, registration and expiry dates, status, and nameservers, live from RDAP.
OpenDNS lookup
Check A, AAAA, CNAME, MX, TXT, NS, SOA, and CAA records for any domain in real time.
OpenDNS propagation checker
See if a DNS change has gone live: what the domain's nameservers and 19 public resolvers in 10 countries return right now.
OpenEvery domain's email records, in one place.
Lemon Domains keeps every domain in one list across registrars, so you know which ones send mail and need these records.