zkoss.org Domain Owner Whois and Analysis

DOMAIN OWNER WHOIS

ⓘ The owner has chosen to keep his whois contact information private.

SEO SCORE

zkoss.org
Make your link ↑ do-follow

✅ 9 criteria passed
❌ 2 criteria to solve

PERFORMANCE OPPORTUNITIES

Make all versions of your website point to the same URL.

Fill the missing alt attributes on your images.

OVERVIEW

• Domain Owner

Private

• Category

Technology & Computing

• Online since

September 18, 2006 Explore Wayback Machine

• Age

18 years, 2 months

• Alexa Rank

#451.106, zkoss.org is in the world's top 1 million websites

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opens a new window

TECHNICAL SEO & SECURITY

❌ SSL Certificate

This website is not SSL secured (HTTPS), the certificate issued by GoDaddy.com, Inc. has expired on July 28, 2020.

✅ Title Tag

Leading Enterprise Java Web Framework | ZK
Length: 42 (recommended: 10 to 70)

✅ Meta Description

ZK is the leading open source Ajax + Mobile Java Web framework integrating jQuery, Spring, JPA, Hibernate, JavaEE, Grails, Scala and many more.
Length: 143 (recommended: 50 to 160)

ⓘ Google preview

Desktop Version

Leading Enterprise Java Web Framework | ZK

https://zkoss.org

ZK is the leading open source Ajax + Mobile Java Web framework integrating jQuery, Spring, JPA, Hibernate, JavaEE, Grails, Scala and many more.

Mobile Version

https://zkoss.org

Leading Enterprise Java Web Framework | ZK

ZK is the leading open source Ajax + Mobile Java Web framework integrating jQuery, Spring, JPA, Hibernate, JavaEE, Grails, Scala a...

✅ Encoding

Great, language/character encoding is specified: utf-8

❌ URL Resolve

No 301 redirects are in place to redirect traffic to your preferred domain. Pages that load successfully both with and without www. are treated as duplicate content! Not all versions of your page point to the same URL.

URL	Resolved URL
http://zkoss.org	https://www.zkoss.org/
https://zkoss.org	SSL certificate's common name is invalid
http://www.zkoss.org	https://www.zkoss.org/
https://www.zkoss.org	https://www.zkoss.org/

✅ Robots.txt

https://zkoss.org/robots.txt

✅ URL Parameters

Great, the domain URLs look clean.

Attribute	Value
ⓘ viewport	width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no

SEMANTIC ANALYSIS

ⓘ The owner has associated the following topics to the website.

ⓘ The results of our semantic analysis are shown below using the website's language.

They are the main concepts covered by zkoss.org.

Each concept has a confidence score. The higher it is, the more important the topic is relative to the page.

Topics

JQuery Confidence: 95%

jQuery is a cross-platform JavaScript library designed to simplify the client-side scripting of HTML. It is free, open-source software using the permissive MIT license. Web analysis indicates that it is the most widely deployed JavaScript library by a large margin.

Grails (framework) Confidence: 94%

Grails is an open source web application framework that uses the Apache Groovy programming language (which is in turn based on the Java platform). It is intended to be a high-productivity framework by following the "coding by convention" paradigm, providing a stand-alone development environment and hiding much of the configuration detail from the developer.

Ajax (programming) Confidence: 92%

Ajax (also AJAX; short for asynchronous JavaScript and XML) is a set of Web development techniques using many Web technologies on the client side to create asynchronous Web applications. With Ajax, Web applications can send data to and retrieve from a server asynchronously (in the background) without interfering with the display and behavior of the existing page. By decoupling the data interchange layer from the presentation layer, Ajax allows for Web pages, and by extension Web applications, to change content dynamically without the need to reload the entire page. In practice, modern implementations commonly substitute JSON for XML due to the advantages of being native to JavaScript.

Web framework Confidence: 89%

A web framework (WF) or web application framework (WAF) is a software framework that is designed to support the development of web applications including web services, web resources, and web APIs. Web frameworks aim to automate the overhead associated with common activities performed in web development. For example, many web frameworks provide libraries for database access, templating frameworks, and session management, and they often promote code reuse. Although they often target development of dynamic web sites, they are also applicable to static websites.

Hibernate (framework) Confidence: 88%

Hibernate ORM (Hibernate in short) is an object-relational mapping tool for the Java programming language. It provides a framework for mapping an object-oriented domain model to a relational database. Hibernate solves object-relational impedance mismatch problems by replacing direct, persistent database accesses with high-level object handling functions.

WEBSITE SPEED

✅ zkoss.org website speed is normal. Page speed is important for visitors and search engines.

Get insights to improve your page loading time.

Page Loading Time

2.9s

This domain loads at the median speed of 2.9 seconds.

Speed Percentile

24%

zkoss.org is faster than approximately 24 percent of the web. Your website page speed needs to be as fast as you can make it, without compromising the customer experience.

A good goal to achieve is a loading time of 2 seconds on desktop and mobile devices.

PAGESPEED INSIGHTS

Page on which speed is tested live:

Chrome User Experience Report Results

Lighthouse Results

TRAFFIC

ⓘ This website is ranked #451.106 by Alexa.

This rank is traffic based. The lower the rank is, the better the domain is ranked.

Daily visitors by country

India (36.8%)
Others (63.2%)

Traffic country ranks

Country	Rank
India	#149.101

LAYOUT

ⓘ Doctype HTML5

ⓘ Responsive website, mobile-friendly.

Mobile Rendering

This website seems to be optimized for Mobile Visitors.

Phone
How zkoss.org looks like on a mobile device such as an iPhone.

Tablet
How zkoss.org looks like on a tablet such as an iPad.

Main colors used

ⓘ These are the main HTML color codes used by this website.

46% #ffffff
29% #e0f0f0
9% #f0ffff
8% #f0f0ff
2% #f0f0f0
1% #a0c0d0
1% #f0fff0
0% #fffff0
0% #b0d0e0
0% #f09070
0% #30b090
0% #40a0c0

Text/code ratio

ⓘ zkoss.org's text/code ratio is 8.32%. It's a bit low. Consider raising it by adding more text content of value for your visitors, or keeping your code clean.

Text / Code Ratio 8.32%

A good text to HTML ratio is anywhere from 25 to 70%.

This percentage refers to the visible text ratio, as opposed to HTML elements, image tags and other non-visible information.

Main HTML tags

✅ Headings

Great, we found headings on this page.

<H1> 2
<H2> 0
<H3> 11
<H4> 0
<H5> 1
<H6> 0

<H1>

Top level heading
Zk - open source java web framework (2)

<H3>

3^rd level heading
Core framework
Featured components
Tools
Explore zk
Resources (3)
Learn zk
Get help
More about zk
Level up easily with zk 9

<H5>

5^th level heading
Navigation menu

❌ Alt attributes

We found 97 images on this website.
11 ALT attributes are missing on your image tags.

Image	Image URL	Occurrences
	/resource/img/Mainpage/main-banner-image-3.png	1
	/resource/img/Mainpage/ZK_Training_ZK9_Walk-Through.png	1
	/resource/img/Mainpage/section_image/rapid-development.png	1
	/resource/img/Mainpage/section_image/simply-java.png	1
	/resource/img/Mainpage/section_image/Enterprise-level-Security.png	1
	/resource/img/Mainpage/section_image/Innovation-technology.png	1
	/resource/img/Mainpage/section_image/Open-source-2.png	1
	/resource/img/icons/png/ZK.png	1
	/resource/img/icons/png/Spreadsheet.png	1
	/resource/img/icons/png/Pivottable.png	1
	/resource/img/icons/png/null.png	1

Alternative text allows you to add a description to an image.

Google rely on alternative text attributes to determine relevance to a search query. Alternative text also makes an image more likely to appear in a Google image search.

It looks like you're missing alternative text for 11 images on zkoss.org. Check your website to make sure it's specified for each image on the page.

LINKS

ⓘ There is a total of 110 links on the homepage of this website.

ⓘ Internal links : 99

For a better readability, only the first 50 internal links are shown below.

Anchor	Type	URL
ZK - Open Source Java Web Framework	text	/
Login	text	/zkdownload/zklogin.zul
	image	/product/zk
	image	/product/zkspreadsheet
	image	/product/zkcharts
	image	/product/zkthemepack
	image	/product/zkpivottable
	image	/product/
	image	/product/zats
	image	/product/zkstudio
	image	//plugins.jetbrains.com/plugin/7855-zk
	image	//www.zkoss.org/zkdemo/
	image	/documentation
ZK Forum	text	//forum.zkoss.org/questions/
ZK Sandbox	text	/zksandbox/
ZK Downloads	text	//www.zkoss.org/download/zk
	image	/documentation
Build your 1st ZK App	text	/documentation
ZK Essentials	text	//books.zkoss.org/zkessentials-book/master/
All Docs	text	/documentation
Blog	text	//blog.zkoss.org/
	image	/support/
	image	/support/training
	image	//forum.zkoss.org/questions/
Premium downloads	text	/download/premium
ZK@Github	text	//github.com/zkoss/zk
	image	/support/about
	image	/price/pricing
	image	/whyzk/zkee
	image	/support/about/contact
WHAT'S NEW	text	https://www.zkoss.org/wiki/small_talks/2019/november/new_features_of_zk_9.0.0_rc
DOWNLOAD	text	/download/zk?zk9
News	text	/news/
ZK 9 RC Released with 20+ Features. Try Now! Nov 13, 2019	text	https://www.zkoss.org/wiki/new_features_of_zk_9_rc
ZK CKEditor 4.11.1.1 upgraded with new feature and bug fixe... Oct 08, 2019	text	https://www.zkoss.org/download/zkckeditor
	image	https://www.zkoss.org/product/zk/releasenote/8.6.3
	image	https://www.zkoss.org/product/zkspreadsheet/releasenote/3.9.5
	image	https://www.zkoss.org/product/zkpivottable/releasenote/2.5.0
	image	http://www.zkoss.org/product/zkcharts/releasenote/3.0.3
Articles	text	/news/articles
Use Bootstrap with ZK: Responsive Admin Template Sep 04, 2019	text	https://www.zkoss.org/wiki/small%20talks/2019/august/use%20bootstrap%20with%20zk:%20responsive%20adm...
Products	text	/product/
ZK Framework	text	/product/zk
ZK Spreadsheet	text	/product/zkspreadsheet
ZK Charts	text	/product/zkcharts
ZK Pivottable	text	/product/zkpivottable
ZK Theme Pack	text	/product/zkthemepack
ZK Studio	text	/product/zkstudio
ZK Calendar	text	/product/zkcalendar
ZK Spring	text	/product/zkspring

ⓘ External links : 11

Anchor	Type	URL
1st Ask The Expert Prize Draw: Winner Announcement! Nov 01, 2019	text	https://blog.zkoss.org/2019/10/24/prize-draw-for-ask-the-expert-training-participants/
[ZK 9 Preview] Embed PDF Documents in Your ZK Application Oct 02, 2019	text	https://blog.zkoss.org/2019/10/02/zk-9-preview-embed-pdf-documents-in-your-zk-application/
Anchornav: A new ZK Addon for scrolling within a page Aug 29, 2019	text	https://blog.zkoss.org/2019/08/29/anchornav-a-new-zk-addon-for-scrolling-within-a-page/
ZK Spreadsheet	text	http://zssdemo.zkoss.org/zssdemo
ZK Calendar	text	http://zcal.zkoss.org
Forum	text	http://forum.zkoss.org/questions/
Blog	text	http://blog.zkoss.org
Request Features	text	http://tracker.zkoss.org/secure/ıssuenavigator.jspa?mode=hide&requestıd=10002
Report Bugs	text	http://tracker.zkoss.org/secure/ıssuenavigator.jspa?mode=hide&requestıd=10001
	image	http://www.openfoundry.org/open-source-hosting-and-promotion-service
Quire	text	https://quire.io