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Site Info - Edx.org
Overview of web technologies used by Edx.org.
edX | Online courses from the world's best universitiesAccess 1600 free online courses from 100+ leading institutions including Harvard, MIT, Microsoft, and more. Join 12 million members. Take a free online class today.
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3 September 1998
Number 1,232 of all websites according to Alexa
Main visitors locations
Drupal is an open source content management system written in PHP, originally developed by Dries Buytaert.
PHP is a popular scripting language for creating web pages.
HTML5 is the fifth revision of the HTML standard.
UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.
PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.
External Cascading Style Sheets define style rules in a separate CSS file.
Persistent cookies with an expiration time between 1 month and 1 year.
HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.
Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.
Non-secure cookies may be used via an unencrypted connections, which may be a security threat.
Gzip (GNU zip) is a file compression algorithm.
The Internet Protocol version 6 (IPv6) provides amongst others a vastly larger address space than the preceding version 4. We consider a website to support IPv6 if a 128-bit address is assigned to it, regardless of the content delivered at that address.
HTTP/2 is the second major version of the HTTP network protocol.
HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.
The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.
The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.
Session cookies are temporary cookies, which are deleted when the user closes the browser.
The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.
Twitter Cards enable automatic attachment of photos, videos and media elements to Tweets.
Microdata is a specification to integrate metadata within existing content on web pages.
Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.
Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.
Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.
Amazon is a US-based e-commerce and cloud computing provider.
China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.
CloudFlare provides a content delivery network.
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