Overview of web technologies used by W3schools.com.
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W3Schools Online Web Tutorials
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
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Shopify is a hosted online store building service.
Shopify
used on a subdomain
Zendesk provides hosted customer service software.
Zendesk
used on a subdomain
Server-side Programming Languages
PHP is a scripting language for creating websites.
Microsoft's Active Server Pages technology on the .NET framework.
Ruby is a general-purpose object-oriented language originally developed by Yukihiro "Matz" Matsumoto in Japan.
Ruby
used on a subdomain
Client-side Programming Language
JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.
React is an open source JavaScript library for building user interfaces, developed by Facebook.
Vue.js is a JavaScript library for building interactive web interfaces, based on the Model View ViewModel pattern.
Angular is a JavaScript library for building web applications, developed by Google.
jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.
jQuery
used on a subdomain
Cloudflare Server is a web server developed by Cloudflare.
Cloudflare Server
used on a subdomain
Envoy Proxy is a proxy server designed for large service-oriented architectures.
Envoy
used on a subdomain
Amazon is a US-based e-commerce and cloud computing provider.
Shopify is a hosted online store building service.
Shopify
used on a subdomain
Zendesk provides hosted customer service software.
Zendesk
used on a subdomain
hosting info partly based on data from ipinfo.io
Amazon is a US-based e-commerce and cloud computing provider.
Akamai is a content delivery network. This includes the former brands Instart Logic and StackPath.
Cloudflare provides a content delivery network.
Cloudflare
used on a subdomain
Amazon is a US-based e-commerce and cloud computing provider.
Gmail is the email service provided by Google.
Amazon is a US-based e-commerce and cloud computing provider.
Zendesk provides hosted customer service software.
Zendesk
used on a subdomain
Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.
GlobalSign is an IT security service provider, also operating as SSL certificate authority.
GlobalSign
used on a subdomain
DigiCert is an SSL certificate authority. This includes Verizon, whose Enterprise SSL Business has been acquired by DigiCert.
DigiCert
used until recently
JavaScript Content Delivery Network
The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare.
CDNJS
used on inner pages
Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google. This includes the Ads conversion tracking and the Floodlight services.
Google Analytics
used on a subdomain
The Google Advertising network consists of AdSense, DoubleClick and other services.
BuySellAds is an advertising network.
BuySellAds
used on inner pages
The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.
External Cascading Style Sheets define style rules in a separate CSS file.
Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.
Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.
Persistent cookies with an expiration time of up to 1 day.
Cookies expiring in hours
used on a subdomain
Persistent cookies with an expiration time between 1 month and 1 year.
Cookies expiring in months
used on a subdomain
HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.
HttpOnly Cookies
used on a subdomain
Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.
Non-HttpOnly Cookies
used on a subdomain
Secure cookies are used only via an encrypted connections, which may increase security.
Secure Cookies
used on a subdomain
Non-secure cookies may be used via an unencrypted connections, which may be a security threat.
Non-Secure Cookies
used on a subdomain
Gzip (GNU zip) is a file compression algorithm.
Brotli is a lossless compression algorithm developed by Google.
Brotli Compression
used on a subdomain
A strong ETag is an HTTP header field for validation of cached web pages, that indicates a byte-for-byte identical page in the cache.
Strong ETag
used on inner pages
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/3 is the third major version of the HTTP network protocol, derived from the QUIC protocol.
HTTP/3
used on a subdomain
HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.
HTTP Strict Transport Security
used on a subdomain
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.
Session Cookies
used until recently
Persistent cookies with an expiration time between 1 day and 1 month.
Cookies expiring in days
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.
Twitter/X Cards enable automatic attachment of photos, videos and media elements to tweets.
Twitter/X Cards
used on a subdomain
JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON.
JSON-LD
used on a subdomain
Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization.
Generic RDFa
used on a subdomain
HTML5 is the fifth revision of the HTML standard.
Strict version of HTML.
HTML Strict 4.01
used on inner pages
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.
JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.
Scalable Vector Graphics (SVG) is an XML-based vector image format.
GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.
WebP is an image format that provides lossless and lossy compression, developed by Google.
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