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

jQuery 3.4.1
73% of sites use a newer version

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Bootstrap

CSS Framework

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Bootstrap

Web Server

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

Nginx

Web Hosting Provider

Sakura is a Japanese web hosting provider.

Sakura
hosting info partly based on data from ipinfo.io, see details

Data Center Provider

Sakura is a Japanese web hosting provider.

Sakura

DNS Server Provider

Otsuka is a Japanese IT services provider. This includes its Alpha Web brand.

Otsuka

Email Server Provider

Otsuka is a Japanese IT services provider. This includes its Alpha Web brand.

Otsuka

SSL Certificate Authority

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

Let’s Encrypt

JavaScript Content Delivery Networks

Google Hosted Libraries (formerly called Google Libraries API) is a content distribution network for the most popular, open-source JavaScript libraries, provided by Google.

Google Hosted Libraries
used on inner pages

The jQuery CDN hosts copies of the jQuery library, provided by MaxCDN.

jQuery CDN
used on inner pages

Site Elements

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

External CSS

Embedded Cascading Style Sheets define a set of style rules in a <style> element within a web page.

Embedded CSS
used on inner pages

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Inline CSS

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

Default protocol https

Markup Language

HTML5 is the fifth revision of the HTML standard.

HTML5

Character Encoding

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

UTF-8

Image File Formats

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

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

Japan