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Site Info - Edx.org

Overview of web technologies used by Edx.org.

Website Background

edX | Online courses from the world's best universities
Access 1600 free online courses from 100+ leading institutions including Harvard, MIT, Microsoft, and more. Join 12 million members. Take a free online class today.

Description on Homepage

3 September 1998

Online since

Number 1,232 of all websites according to Alexa

Popularity rank

CountryVisitorsCountry Rank
United States18.2%1,306
India14.2%536
China11.9%870

Main visitors locations

Drupal is an open source content management system written in PHP, originally developed by Dries Buytaert.

Drupal 7.65
(version 7.64 used until recently)
(17% of sites use a newer version)

PHP is a popular scripting language for creating web pages.

PHP

JavaScript is a lightweight, object-oriented, cross-platform scripting language, mainly used within web pages.

JavaScript

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

jQuery

Underscore is a JavaScript library that provides functional programming support.

Underscore

Backbone is a JavaScript library providing a framework for defining models in applications.

Backbone

Lodash is a JavaScript utility library delivering modularity.

Lodash

HTML5 is the fifth revision of the HTML standard.

HTML5

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

UTF-8

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.

PNG

External Cascading Style Sheets define style rules in a separate CSS file.

External CSS

Persistent cookies with an expiration time between 1 month and 1 year.

Cookies expiring in months

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

HttpOnly Cookies

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-HttpOnly Cookies

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Non-Secure Cookies

Gzip (GNU zip) is a file compression algorithm.

Gzip Compression

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.

IPv6

HTTP/2 is the second major version of the HTTP network protocol.

HTTP/2

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

HTTP Strict Transport Security

The websites redirects visitors to its www subdomain, e.g. from example.com to www.example.com.

Default subdomain www

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

Default protocol https

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Session Cookies
(used until recently)

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.

Open Graph

Twitter Cards enable automatic attachment of photos, videos and media elements to Tweets.

Twitter Cards

Microdata is a specification to integrate metadata within existing content on web pages.

Microdata

Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.

Generic RDFa

Sectigo (formerly Comodo CA) is a US-based SSL certificate authority.

Sectigo

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

Nginx

Amazon is a US-based e-commerce and cloud computing provider.

Amazon

China Telecom (China Telecommunications Corporation) is a Chinese state-owned telecommunication company.

China Telecom
(used until recently)
hosting info based on data from ipinfo.io

CloudFlare provides a content delivery network.

CloudFlare

Non-profit organizations

.org

United States
China
(used until recently)

English

 

 

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