Domain Security Score
Run 9 security checks on a domain at once: SSL, HTTP headers, email authentication, ports and more. Get a 0-100 score, an A-F grade and a short fix list. Free.
Detected
Health Score
Priority Actions most severe first
Score by area
RDAP
DNS
SSL
HTTP
Email Deliverability
DNS Propagation
Port Scan
Reverse DNS
ASN / BGP
Comprehensive Security Lookup
Run 9 security checks in a single query: RDAP registration, DNS records, SSL certificate, HTTP headers, email authentication, DNS propagation, open ports, reverse DNS, and ASN/BGP. Results are scored 0-100 with weighted diagnostics across all areas. The health score identifies your domain's weakest points with prioritized remediation actions.
How It Works
The checks run in parallel; reverse DNS and ASN wait for the A record, and the certificate is read from our Seoul server. Results are collected, interpreted and scored with area weights: DNS (18%), SSL (18%), HTTP (14%), Email (14%), RDAP (10%), Propagation (8%), Port (8%), rDNS (5%), ASN (5%). Critical issues receive larger deductions. The top 5 priority actions are drawn from all findings.
FAQ
What does the Health Score mean?
The Health Score (0-100) is a weighted composite of all 9 diagnostic areas. 90+ = Excellent (all green), 70-89 = Good (minor improvements possible), 50-69 = Fair (action needed), below 50 = Poor (multiple areas need immediate attention). The score breakdown shows exactly where points are lost.
How often should I run a comprehensive scan?
Run after any infrastructure change (DNS update, certificate renewal, server migration). For ongoing monitoring, a weekly scan catches certificate expirations, DNS misconfigurations, and new blacklist entries before they impact users.
Can I share the results with my team?
Yes — click "Share Link (masked)" to create a shareable URL. Sensitive data (IP addresses, email addresses) is automatically masked before sharing. The link expires after 7 days. You can also copy the full report as Markdown for tickets or documentation.