Find out if your domain has expired certificates, spoofable email, known vulnerabilities, or breach exposure — before attackers or customers do. Free security check, no signup required.
What Does This Scan Check?
Our free scan runs the full GuardHound platform — uptime, certificates, domain intelligence, digital risk, and risk-score dimensions — in parallel to give you a comprehensive security audit in under 30 seconds.
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SSL / TLS Certificate — Validates your certificate chain, checks expiry dates, and detects self-signed or misconfigured certificates that break browser trust.
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DNS & Email Security (SPF, DMARC, DKIM) — Verifies that your domain has proper email authentication records to prevent spoofing and phishing attacks.
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DMARC Policy — Checks your DMARC record for enforcement level (none, quarantine, reject) and alignment settings to protect against email impersonation.
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CVE Vulnerabilities — Fingerprints your server stack from HTTP headers and checks the National Vulnerability Database and CISA's Known Exploited Vulnerabilities list.
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Data Breach Monitoring — Scans breach databases for known data breaches associated with your domain, alerting you to compromised credentials.
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Lookalike Domain Detection — Generates typosquat variants and resolves each via DNS to identify active phishing infrastructure targeting your brand.
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WHOIS & Registrar Changes — Snapshots your registrar and nameservers, flagging any changes that could indicate domain hijacking.
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Google Safe Browsing — Checks your domain against Google's malware, phishing, and unwanted software lists.
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Subdomain Discovery — Queries Certificate Transparency logs to find subdomains, identifying shadow IT and forgotten services.
Why Scan Your Domain?
- Discover security issues before attackers exploit them — expired SSL certificates, missing DMARC records, and known CVEs are common attack vectors.
- Protect your brand reputation — lookalike domains and safe browsing flags damage customer trust and can get your emails blocked.
- Meet compliance requirements — many frameworks require regular security assessments, and domain security is a foundational layer.
- Get actionable remediation guidance — every finding includes a clear explanation of the risk and steps to fix it.
- Monitor continuously — upgrade to a paid plan to get automated daily or hourly scans with email alerts when your security score changes.
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Frequently Asked Questions
Is this domain security scan really free?
Yes, completely free. You can scan any domain without creating an account or entering a credit card. The free scan runs the full GuardHound platform across all five pillars and gives you your seven-dimension risk score plus your top 3 findings. Sign up for a free account to see the full report.
What data do you collect during a scan?
We only collect the domain name you enter and your optional email address. All scan data is gathered from publicly available sources — SSL certificates, DNS records, NVD, Certificate Transparency logs, and breach databases. We never access your server or internal systems.
How is the security score calculated?
Your domain starts at 100 and loses weighted points across
seven dimensions: uptime, certificates, DNS, email authentication, breach exposure, vulnerabilities, and brand / digital risk. Each daily snapshot also records the top contributors so you know exactly what dropped your score.
Read the full breakdown →
Can I scan any domain or only ones I own?
You can scan any domain. Our scanner only queries publicly available information — the same data anyone can access. To set up continuous monitoring, you'll need to verify domain ownership via a DNS TXT record.
How long does a scan take?
Most scans complete in under 30 seconds. We run all five GuardHound pillars in parallel to deliver results as fast as possible.
Learn More About Domain Security