DEFENDORIA SECURITY LAB
Free cybersecurity tools
Useful security diagnostics backed by observable evidence and published advisories. Start with the check that matches your question.
Website Security Checker
Check HTTPS, TLS certificate details, DNS and browser-security headers without website credentials.
WordPress Vulnerability Checker
Look up published vulnerabilities for a WordPress plugin, theme or core version, with source links and affected-version comparisons.
Website Malware & Reputation Checker
Check Quad9 threat-blocking DNS observations and limited public homepage warning signs, with clear evidence and limitations.
SSL Certificate & TLS Diagnostics Checker
Verify real HTTPS certificate trust, validity dates, issuer, certificate names, and TLS 1.2/1.3 negotiation.
Advanced HTTP Security Headers Analyzer
Inspect real CSP directives, HSTS, cookie protections, clickjacking defenses, and cross-origin policies with developer-ready remediation guidance.
Tools offer limited diagnostics, not a guarantee of website security or a substitute for an authorized assessment.