DNS & Email Tools
Instant SPF, DKIM, DMARC, MX, and WHOIS lookups — all client-side using the Cloudflare DNS-over-HTTPS API. No data is sent to any server other than Cloudflare's public resolver and RDAP.
SPF Record Checker
Checks TXT records for v=spf1 at your domain root
DKIM Record Checker
Looks up TXT at <selector>._domainkey.<domain>
DMARC Record Checker
Looks up TXT at _dmarc.<domain> and parses the policy
MX Record Lookup
Returns all mail exchange records and their priorities
Domain Reachability Check
Checks A / AAAA DNS records (browser cannot do ICMP ping)
WHOIS Lookup
Uses RDAP via rdap.org — CORS-safe, no API key needed
DNS queries use Cloudflare DoH. WHOIS uses rdap.org. No data logged or stored.