Duolingo
duolingo.com
46%
Security Score
13
Failed
11
Passed
24
Total Checks
Security Checks (24)
What We Check on Duolingo
TLS / HTTPS Security
We verify that duolingo.com uses HTTPS with a valid TLS certificate, modern cipher suites, and proper HSTS configuration to protect data in transit.
Security Headers
We check whether duolingo.com sends critical headers like Content-Security-Policy, X-Frame-Options, and Permissions-Policy to defend against XSS and clickjacking.
Content Security
We scan duolingo.com for mixed content, vulnerable JavaScript libraries, exposed admin panels, and information disclosure risks.
DNS & Email Security
We validate SPF, DKIM, and DMARC records for duolingo.com, check DNSSEC, and test for subdomain takeover vulnerabilities.
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