~/tools / security-headers
Security Headers Checker
Scan HTTP security headers. Grades HSTS, CSP, X-Frame-Options and others, with explanations of what each header protects.
[ WARNING ]
Decent but improvable (50/100) — missing: X-Frame-Options, Referrer-Policy, Permissions-Policy
── output ─────
50
security_score
HTTP 200 · https://www.otto.de/
Strict-Transport-Security (HSTS)
[ STRONG ]
// Forces HTTPS for all connections. Prevents downgrade attacks.
max-age=31536000
Content-Security-Policy (CSP)
[ STRONG ]
// Defines which sources of scripts/styles/images are allowed. Prevents XSS.
frame-ancestors 'self' https://*.otto.de https://*.ottogroup.com https://og2gether.sharepoint.com https://otto.mpp360.cloud https://internal.otto.market;
X-Frame-Options
[ MISSING ]
// Prevents clickjacking by blocking iframe embedding from other origins.
// missing — add this header to improve security
X-Content-Type-Options
[ STRONG ]
// Prevents MIME sniffing. Should be 'nosniff'.
nosniff
Referrer-Policy
[ MISSING ]
// Controls how much referrer info is leaked when navigating away.
// missing — add this header to improve security
Permissions-Policy
[ MISSING ]
// Restricts which browser features (camera, mic, etc.) the page can use.
// missing — add this header to improve security