HSTS Checker
Check if a site sends Strict-Transport-Security header. Verify max-age, includeSubDomains, preload.
Fetches headers from our server — checks Strict-Transport-Security.
Check if a site sends Strict-Transport-Security header. Verify max-age, includeSubDomains, preload.
Fetches headers from our server — checks Strict-Transport-Security.