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Site Info - Preventblindness.org

Overview of web technologies used by Preventblindness.org.

Website Background

Prevent Blindness: A Lifetime of Healthy Vision
Prevent Blindness brings Americans to eye care. Your donation today will fund outreach to people at the highest risk of vision loss. It will support quality

Description on Homepage

Prevent Blindness America

Description from Alexa

5 May 1997

Online since

Number 565,361 of all websites according to Alexa

Popularity rank

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

Drupal 7.56
(version 7.44 used until recently)
(6% 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 1.10
(60% of sites use a newer version)

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

Scalable Vector Graphics (SVG) is an XML-based vector image format.

SVG

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

JPEG
(used until recently)

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

External CSS

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

Inline 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

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

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

SPDY (pronounced speedy) is a web protocol developed by Google, the basis for HTTP/2.

SPDY

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

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

Non-Secure Cookies
(used until recently)

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

Weak ETag
(used until recently)

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

Generic RDFa

The SSL certificate is invalid because it is not issued for the domain where it is used.

Invalid Domain

Comodo provides IT services, software, and SSL certificates under various brand names.

Comodo

The CDNJS is a content distribution network, hosting a large number of JavaScript libraries, provided by CloudFlare.

CDNJS

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

jQuery CDN

Google Analytics is a free service to get detailed statistics about the visitors of a website, provided by Google.

Google Analytics

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

Nginx

Rackspace is a managed cloud computing company based in USA.

Rackspace
hosting info based on data from ipinfo.io

CloudFlare provides a content delivery network.

CloudFlare

Non-profit organizations

.org

United States

English

Technology Score

The technology score rates a site based on its technologies in a range from 0 to 100. It consists in a popularity score (how many sites use the same technologies), a traffic score (how much traffic have other sites using the same technologies) and a version score (how many sites use more recent technology versions). Quality alerts also affect the rating.

TotalPopularity TrafficVersion
Technology Score64745367
Content Management Systems56225494
Server-side Programming Languages679143
Client-side Programming Languages7510050
JavaScript Libraries62984740
Markup Languages678253
SSL Certificate Authorities606257
JavaScript Content Delivery Networks514755
Traffic Analysis Tools709148
Web Servers586056
Reverse Proxy Services758565

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