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Site Info - Couchsurfing.comOverview of web technologies used by Couchsurfing.com. Website Background Meet and Stay with Locals All Over the World | CouchsurfingMeet and Stay with Locals All Over the World Description on Homepage Top 100k among all websites Popularity rank WordPress is an open source blog publishing and content management system, based on PHP and MySQL. WordPress 5.3.2 Shopify is a hosted online store building service. Shopify PHP is a scripting language for creating websites. PHP 7.2.34 Ruby is a general-purpose object-oriented language originally developed by Yukihiro "Matz" Matsumoto in Japan. Ruby 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 2.2.4 Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the visitors browser. Bootstrap is an open source HTML, CSS, and JavaScript framework. Bootstrap Popper is an open source JavaScript library for tooltips and popovers. Popper Bootstrap is an open source HTML, CSS, and JavaScript framework. Bootstrap Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev. Nginx 1.20.0 Cloudflare Server is a web server developed by Cloudflare. Cloudflare Server Amazon is a US-based e-commerce and cloud computing provider. Shopify is a hosted online store building service. Shopify Amazon is a US-based e-commerce and cloud computing provider. Amazon CloudFront is a content delivery web service by Amazon. Cloudflare provides a content delivery network. Cloudflare Amazon is a US-based e-commerce and cloud computing provider. Gmail is the email service provided by Google. Starfield Technologies is an SSL certificate authority owned by Go Daddy. IdenTrust is a SSL certificate authority. IdenTrust The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare. Google Hosted Libraries (formerly called Google Libraries API) is a content distribution network for the most popular, open-source JavaScript libraries, provided by Google. Facebook Pixel is an analytics tool to track actions on websites. 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 WordPress Jetpack Stats is a visitor tracking plugin for the WordPress publishing platform. WordPress Jetpack 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. Embedded CSS 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. Persistent cookies with an expiration time of up to 1 day. Cookies expiring in hours Persistent cookies with an expiration time between 1 day and 1 month. Cookies expiring in days Persistent cookies with an expiration time between 1 month and 1 year. Cookies expiring in months Persistent cookies with an expiration time between 1 and 10 years. 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-HttpOnly Cookies Secure cookies are used only via an encrypted connections, which may increase security. Non-secure cookies may be used via an unencrypted connections, which may be a security threat. Non-Secure Cookies Brotli is a lossless compression algorithm developed by Google. Brotli Compression 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 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 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. Generic RDFa (Resource Description Framework in attributes) is RDFa without further specialization. Generic RDFa Microdata is a specification to integrate metadata within existing content on web pages. Microdata 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. JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images. JPEG Scalable Vector Graphics (SVG) is an XML-based vector image format. SVG Commercial entities United States English
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