Free Tools
Instant diagnostics for DNS, SSL, and email
No account needed. Run checks directly from your browser, free, any time.
DNS Checker
Enter any domain to instantly query A, AAAA, MX, TXT, CNAME, NS, SOA, CAA, and SRV records via Cloudflare DNS-over-HTTPS. Results display in a clean, human-readable layout with explanations for key record types. Download a properly-formatted BIND zone file ready for AWS Route53 import.
SSL Certificate Checker
Check any hostname's SSL certificate without a browser. See subject, issuer, expiry date, Subject Alternative Names, cipher suite, and protocol version. Color-coded health status shows whether your cert is valid, expiring soon, or already expired.
Email Security Checker
Audit your email security posture in seconds. Checks MX records, SPF policy, DMARC policy, and DKIM public keys for common selectors. Each result shows a clear pass, fail, or warning status with a plain-English explanation of what it means for your deliverability and security.
HTTP Headers Inspector
Fetch and inspect HTTP response headers for any URL. Headers are grouped into Security, Caching, Content, and Other categories. Key security headers receive pass, warn, or missing grades so you can see at a glance where your site stands.
Need more than a quick check?
Our team can audit your full environment, fix what these tools flag, and keep everything running properly on an ongoing basis.