SSL Certificates

HSTSHSTS

HSTS Usage Statistics · Download List of All Websites using HSTS

Forces browsers to only communicate with the site using HTTPS.

HSTS IncludeSubdomains PreLoadHSTS IncludeSubdomains PreLoad

HSTS IncludeSubdomains PreLoad Usage Statistics · Download List of All Websites using HSTS IncludeSubdomains PreLoad

This website includes instructions for HSTS loading that would allow it to be submitted to the HSTS preload list.

Document Encoding

UTF-8UTF-8

UTF-8 Usage Statistics

UTF-8 (8-bit UCS/Unicode Transformation Format) is a variable-length character encoding for Unicode. It is the preferred encoding for web pages.

Document Standards

HTML5 DocTypeHTML5 DocType

HTML5 DocType Usage Statistics

The DOCTYPE is a required preamble for HTML5 websites.

Meta RobotMeta Robot

Meta Robot Usage Statistics

This page contains a meta robots tag which tells search engines and robots to index or not index the page.

Cascading Style SheetsCascading Style Sheets

Cascading Style Sheets Usage Statistics

Cascading Style Sheets (CSS) is a stylesheet language used to describe the presentation of a document written in a markup language. Its most common application is to style web pages written in HTML

JavascriptJavascript

Javascript Usage Statistics

JavaScript is a scripting language most often used for client-side web development.

Strict Transport SecurityStrict Transport Security

Strict Transport Security Usage Statistics

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

X-Frame-OptionsX-Frame-Options

X-Frame-Options Usage Statistics

The X-Frame-Options HTTP response header can be used to indicate whether or not a browser should be allowed to render a page in a frame or iframe. Sites can use this to avoid clickjacking attacks, by ensuring that their content is not embedded into other sites.

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.

Referrer PolicyReferrer Policy

Referrer Policy Usage Statistics

Requests made from a document, and for navigations away from that document are associated with a Referrer header. This policy determines in the browser should send a referrer or not.

Cross Origin Resource SharingCross Origin Resource Sharing

Cross Origin Resource Sharing Usage Statistics

CORP Allows a server to indicate any other origins (domain, scheme, or port) than its own from which a browser should permit loading of resources.

Cross-Origin Embedder PolicyCross-Origin Embedder Policy

Cross-Origin Embedder Policy Usage Statistics

COEP Prevents a document from loading any cross-origin resources that don't explicitly grant the document permission.

Cross Origin Opener PolicyCross Origin Opener Policy

Cross Origin Opener Policy Usage Statistics

COOP allows you to ensure a top-level document does not share a browsing context group with cross-origin documents.