What does the SiteGuardian security scanner check?

The scanner checks SSL/TLS certificates, 6 security headers (HSTS, CSP, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy), DNSSEC, email authentication (SPF, DKIM, DMARC), SMTP encryption, MTA-STS, DANE/TLSA, CAA records, and DNS exposure. Results are scored 0-100 with an A-F grade.

Is the security scanner free?

Yes, completely free. No account, no signup, no credit card needed. Enter any domain and get instant results.

How is the security score calculated?

The score is out of 100 points: Security Headers (25 pts), SSL/TLS (20 pts), Email Authentication (15 pts), DNS Security (15 pts), HTTPS Enforcement (10 pts), security.txt (5 pts), MTA-STS + TLS-RPT (5 pts), and Server Hardening (5 pts). Grade A = 90-100, B = 75-89, C = 60-74, D = 40-59, F = 0-39.

Which compliance frameworks does the scan map to?

Scan findings are mapped to GDPR, NIS2, CRA (Cyber Resilience Act), ISO 27001, SOC 2, PCI DSS, and other EU regulatory frameworks. Each finding shows which regulations it affects.

Where is the scan data processed?

All scans run from EU-hosted infrastructure in Germany. No data is transferred outside the EU. Scan results are cached temporarily and not stored permanently unless you create an account.

Gratuito — sem necessidade de conta

Verificação de segurança de sites gratuita

Introduza um domínio. Obtenha a sua classificação de segurança, pontuação e uma análise detalhada — em segundos.

Verificamos certificados SSL, cabeçalhos de segurança, DNSSEC, autenticação de e-mail, encriptação SMTP e muito mais.

Baseado em dados de 814,441+ sites europeus. Ver o benchmark

O que verificamos

O seu site é analisado nestas dimensões de segurança. Cada uma é pontuada de forma independente.

Cabeçalhos de segurança

25 pts

HSTS, CSP, X-Frame-Options, X-Content-Type, Referrer-Policy, Permissions-Policy

SSL/TLS Certificate

20 pts

Key strength, signature algorithm, chain depth, TLS version, HTTPS redirect

Autenticação de email

15 pts

SPF, DKIM key strength, DMARC policy enforcement, MTA-STS, TLS-RPT, SMTP encryption

Segurança DNS

15 pts

DNSSEC validation, CAA records, DANE/TLSA, DoH consistency

security.txt

5 pts

Vulnerability disclosure contact per RFC 9116

Privacidade do servidor

5 pts

No version disclosure, no X-Powered-By, restricted CORS headers

Enter a domain

Type any URL — we handle the rest. No login, no signup, no credit card.

We scan everything

SSL, headers, DNS, email auth, SMTP encryption — checked in seconds from our EU servers.

See your grade

A-to-F grade, 0-100 score, and detailed recommendations for every finding.

Uma análise mostra o problema. A monitorização contínua previne-o.

Monitorização contínua — uptime, SSL, DNS, autenticação de e-mail. A partir de 29 €*/mês.

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