Defendoria

Conceptual illustration of protecting a website and its data

FREE DEFENDORIA SECURITY TOOL

Website Security Checker

Check the public security settings your website exposes. Inspect HTTPS, certificates, DNS and browser protections, then get evidence-based findings and practical next steps.

No account or login
Public read-only checks
Evidence with guidance

Check a website

No account required Public configuration Read-only


Enter a domain only (no paths or ports). Your website won’t be changed or actively tested for vulnerabilities.

Included checks: HTTPS & TLS Certificate expiry Security headers Public DNS

What we inspect

A quick look at the public security controls we check and why they matter.

ControlWhat we check
HTTPS & TLSConfirms a certificate-verified HTTPS connection to the homepage.
CertificateChecks the certificate expiry date when available from TLS metadata.
Security headersInspects HSTS, CSP, framing controls, MIME sniffing and Referrer-Policy.
Public DNSConfirms the domain resolves to publicly routable DNS addresses.

Frequently asked questions

Is this a full website vulnerability scan?

No. It checks public DNS records and a certificate-verified HTTPS response, including selected security headers. It cannot detect every vulnerability or confirm that a website is secure.

Can a website pass these checks and still be vulnerable?

Yes. Configuration controls don’t determine whether applications, plugins, access permissions, or server components are vulnerable.

Which security headers do you check?

HSTS, Content Security Policy, X-Content-Type-Options, framing protections, and Referrer-Policy. The checker reports what is observed, not full policy effectiveness.

Do you store or share the results?

Recent results are cached temporarily on the server for efficiency. The checker does not require your email or account. Avoid entering domains you do not want checked by a public diagnostic service.

How can Defendoria help beyond this checker?

A scoped Website Security Audit can involve authorized investigation of your website’s applications, access controls, components and recovery readiness.

Get a complete website security audit

Go beyond public checks with a scoped security review, documented findings and prioritized remediation guidance.