SSL Certificates

HSTSHSTS

HSTS Usage Statistics · Download List of All Websites using HSTS

Forces browsers to only communicate with the site using HTTPS.

Document Standards

HTML 4.01 Transitional DTDHTML 4.01 Transitional DTD

HTML 4.01 Transitional DTD Usage Statistics

Claims HTML 4.01 Transitional DTD, which includes presentation attributes and elements that W3C expects to phase out as support for style sheets matures.

Content Security PolicyContent Security Policy

Content Security Policy Usage Statistics

Content Security Policy is a computer security concept, to prevent cross-site scripting XSS attacks.

Content Type OptionsContent Type Options

Content Type Options Usage Statistics

Used to disable MIME-sniffing for a particular HTTP response.

Strict Transport SecurityStrict Transport Security

Strict Transport Security Usage Statistics

The HTTP Strict-Transport-Security (HSTS) header instructs the browser to only use https.