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Site Info - Zearn.orgOverview of web technologies used by Zearn.org. Website Background Login | Zearn MathLearning with Zearn helps math make sense. Students explore math through pictures, visual models, and real-life examples. Log in to your Zearn account. Description on Homepage Top 1k among all websites Popularity rank Webflow is a hosted website building service. Webflow JavaScript is a lightweight, object-oriented, cross-platform scripting language. This includes TypeScript. JavaScript JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages. jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig. jQuery Cloudflare Server is a web server developed by Cloudflare. Cloudflare Server Node.js is a server-side JavaScript environment for writing network programs such as web servers, originally developed by Ryan Dahl. Node.js Ubuntu is a Linux distribution. Heroku provides a cloud platform for applications and websites, owned by Salesforce. Webflow is a hosted website building service. Webflow Amazon is a US-based e-commerce and cloud computing provider. Cloudflare provides a content delivery network. Cloudflare DNSimple is a domain name services and DNS hosting provider. Cloudflare provides DNS servers and other web services. Cloudflare Microsoft is a multinational technology company headquartered in USA, also offering email services. Sectigo (formerly Comodo CA) is a US-based SSL certificate authority. GlobalSign is an IT security service provider, also operating as SSL certificate authority. GlobalSign Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.
jsDelivr is a service for hosting JavaScript files. jsDelivr 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 Twitter/X conversion tracking tracks the actions of website visitors coming from Twitter ads. Twitter/X tracking The Google Advertising network consists of AdSense, DoubleClick and other services. Google Ads The Google Tag Manager is a Google service to support webmasters to manage tags on their websites. Google Tag Manager 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. Session cookies are temporary cookies, which are deleted when the user closes the browser. Session Cookies HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security. HttpOnly Cookies Secure cookies are used only via an encrypted connections, which may increase security. Secure Cookies Gzip (GNU zip) is a file compression algorithm. Gzip Compression A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache. 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/3 is the third major version of the HTTP network protocol, derived from the QUIC protocol. HTTP/3 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. The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/. 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. JSON-LD (JavaScript Object Notation for Linked Data) is a method of encoding Linked Data using JSON. JSON-LD Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization. Generic RDFa 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. Scalable Vector Graphics (SVG) is an XML-based vector image format. 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 WebP is an image format that provides lossless and lossy compression, developed by Google. WebP AVIF (AV1 Image File Format) is an image file format specification for storing images or image sequences compressed with AV1 in the HEIF file format. AVIF Organizations United States
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