w3school.com.cn | Free Online SEO Audit for w3school.com.cn

Tasks

Make the site mobile device friendly.
Select one version of your site as main and make a redirect from other versions to that one.
Avoid using deprecated HTML tags.
Implement the viewport meta tag.

SEO

URL

Domain : www.w3school.com.cn/

Character length : 20

Title

w3school 在线教程

Description

全球最大的中文 Web 技术教程。

Keywords (meta keywords)

Good! The website does not use “meta keywords”.

Open Graph Protocol

Error! The website does not use the OG (Open Graph) protocol.

Dublin Core

Dublin Core is not used

Underscores in the URLs

Error! Hyphen (-) is a better solution than underscore (_) in the URLs

http://www.w3school.com.cn/xsl/xsl_languages.asp ("XSL")
http://www.w3school.com.cn/aspnet/webpages_intro.asp ("Web Pages")
http://www.w3school.com.cn/aspnet/razor_intro.asp ("Razor")
http://www.w3school.com.cn/aspnet/mvc_intro.asp ("MVC")
http://www.w3school.com.cn/aspnet/aspnet_intro.asp ("Web Forms")
http://www.w3school.com.cn/about/about_helping.asp ("°ïÖú W3School")
http://www.w3school.com.cn/php/php_ref_calendar.asp ("²Î¿¼ÊÖ²á£ºPHP Calendar º¯Êý")
http://www.w3school.com.cn/php/php_ref_date.asp ("²Î¿¼ÊÖ²á£ºPHP Date / Time º¯Êý")
http://www.w3school.com.cn/tags/html_ref_colornames.asp ("HTML ÑÕÉ«")
http://www.w3school.com.cn/jquery/jquery_reference.asp ("jQuery")
http://www.w3school.com.cn/jquerymobile/jquerymobile_ref_data.asp ("jQuery Mobile")
http://www.w3school.com.cn/vbscript/vbscript_ref_functions.asp ("VBScript")
http://www.w3school.com.cn/asp/asp_ref.asp ("ASP")
http://www.w3school.com.cn/ado/ado_reference.asp ("ADO")
http://www.w3school.com.cn/aspnet/aspnet_reference.asp ("ASP.NET")
http://www.w3school.com.cn/php/php_ref.asp ("PHP 5.1")
http://www.w3school.com.cn/xmldom/xmldom_reference.asp ("XML DOM")
http://www.w3school.com.cn/xsl/xsl_w3celementref.asp ("XSLT 1.0")
http://www.w3school.com.cn/xpath/xpath_functions.asp ("XPath 2.0")
http://www.w3school.com.cn/xslfo/xslfo_reference.asp ("XSL-FO")
http://www.w3school.com.cn/wap/wml_reference.asp ("WML 1.1")
http://www.w3school.com.cn/tags/html_ref_charactersets.asp ("HTML ×Ö·û¼¯")
http://www.w3school.com.cn/tags/html_ref_ascii.asp ("HTML ASCII")
http://www.w3school.com.cn/tags/html_ref_entities.html ("HTML ISO-8859-1")
http://www.w3school.com.cn/tags/html_ref_symbols.html ("HTML ·ûºÅ")
http://www.w3school.com.cn/example/html_examples.asp ("HTML ÊµÀý")
http://www.w3school.com.cn/example/csse_examples.asp ("CSS ÊµÀý")
http://www.w3school.com.cn/example/xmle_examples.asp ("XML ÊµÀý")
http://www.w3school.com.cn/example/jseg_examples.asp ("JavaScript ÊµÀý")
http://www.w3school.com.cn/example/jsrf_examples.asp ("JavaScript ¶ÔÏóÊµÀý")
http://www.w3school.com.cn/example/hdom_examples.asp ("HTML DOM ÊµÀý")
http://www.w3school.com.cn/jquery/jquery_examples.asp ("jQuery ÊµÀý")
http://www.w3school.com.cn/jquerymobile/jquerymobile_examples.asp ("jQuery Mobile ÊµÀý")
http://www.w3school.com.cn/example/xdom_examples.asp ("XML DOM ÊµÀý")
http://www.w3school.com.cn/example/dhtm_examples.asp ("DHTML ÊµÀý")
http://www.w3school.com.cn/example/ajax_examples.asp ("AJAX ÊµÀý")
http://www.w3school.com.cn/example/vbst_examples.asp ("VBScript ÊµÀý")
http://www.w3school.com.cn/example/aspe_examples.asp ("ASP ÊµÀý")
http://www.w3school.com.cn/example/adoe_examples.asp ("ADO ÊµÀý")
http://www.w3school.com.cn/svg/svg_examples.asp ("SVG ÊµÀý")
http://www.w3school.com.cn/wap/wap_demo.asp ("WAP ÊµÀý")
http://www.w3school.com.cn/html/html_quiz.asp ("HTML ²âÑé")
http://www.w3school.com.cn/html5/html5_quiz.asp ("HTML5 ²âÑé")
http://www.w3school.com.cn/xhtml/xhtml_quiz.asp ("XHTML ²âÑé")
http://www.w3school.com.cn/css/css_quiz.asp ("CSS ²âÑé")
http://www.w3school.com.cn/xml/xml_quiz.asp ("XML ²âÑé")
http://www.w3school.com.cn/js/js_quiz.asp ("JavaScript ²âÑé")
http://www.w3school.com.cn/jquery/jquery_quiz.asp ("jQuery ²âÑé")
http://www.w3school.com.cn/sql/sql_quiz.asp ("SQL ²âÑé")
http://www.w3school.com.cn/asp/asp_quiz.asp ("ASP ²âÑé")
http://www.w3school.com.cn/php/php_quiz.asp ("PHP ²âÑé")
http://www.w3school.com.cn/site/site_validate.asp ("ÑéÖ¤HTML")
http://www.w3school.com.cn/site/site_validate.asp ("ÑéÖ¤CSS")
http://www.w3school.com.cn/site/site_validate.asp ("ÑéÖ¤XHTML")
http://www.w3school.com.cn/site/site_validate.asp ("ÑéÖ¤XML")
http://www.w3school.com.cn/site/site_validate.asp ("ÑéÖ¤WML")
http://www.w3school.com.cn/about/about_use.asp ("Ê¹ÓÃÌõ¿î")
http://www.w3school.com.cn/about/about_privacy.asp ("ÒþË½Ìõ¿î")
Expand

Search engine friendly URLs

Good! The website uses SEO friendly URLs.

Checking the robots.txt file

There is robots.txt file.

Social

Social Engagement

Linkedin2

Facebook Share0

Facebook Comments0

Content

Doctype

XHTML 1.0 Strict

Encoding

Perfect! The character encoding is set: GB2312.

Language

We have found the language localisation: ”zh”.

Title

w3school 在线教程

Character length : 13

Good! The title’s length is between 10 and 70 characters.

Text / HTML ratio

Ratio : 34%

Good! The text / code ratio is between 25 and 70 percent.

Headings

H1	H2	H3	H4	H5	H6
1	15	7	0	0	0

Heading structure in the source code

<H1> w3school ÔÚÏß½Ì³Ì
<H2> HTML½Ì³Ì
<H2> ä¯ÀÀÆ÷½Å±¾
<H2> ·þÎñÆ÷½Å±¾
<H2> XML½Ì³Ì
<H2> Web Services
<H2> .NET
<H2> ½¨Õ¾ÊÖ²á
<H2> ¹ØÓÚ W3School
<H2> °ïÖú W3School
<H2> ÁìÏÈµÄ Web ¼¼Êõ½Ì³Ì - È«²¿Ãâ·Ñ
<H3> ÍêÕûµÄÍøÕ¾¼¼Êõ²Î¿¼ÊÖ²á
<H3> ÔÚÏßÊµÀý²âÊÔ¹¤¾ß
<H3> ¿ì½ÝÒ×¶®µÄÑ§Ï°·½Ê½
<H3> ´ÓºÎÈëÊÖ£¿
<H3> W3School ÐÂÎÅ
<H3> W3School ¸üÐÂÐÅÏ¢
<H3> W3School ÓÑÇéÁ´½Ó
<H2> ²Î¿¼ÊÖ²á
<H2> ×Ö·û¼¯
<H2> ÊµÀý/°¸Àý
<H2> ²âÑé/¿¼ÊÔ
<H2> ´úÂëÑéÖ¤

Word cloud

êµàý15
html13
asp8
xml7
jquery7
web6
dom6
javascript5
net4
css4
mobile3
services3
php3
vbscript3
ado3
ïµáð½ì³ì3
xsl-fo2
×ö·û¼¯2
svg2
wap2
sql2
xpath2
xslt2
ä¯ààæ÷½å±¾2
ajax2
xhtml2
dhtml2

Keyword matrix

word	title	descriptions	heading
êµàý
html
asp
xml
jquery
web

Three Word cloud

javascript html dom2

404 Page

The website has no standard 404 error page.

Flash content

Good! The website does not have any flash contents.

Frame

Good! The website does not use iFrame solutions.

Images

We found 3 images on this web page.

Good! Every image has an alternative text attributes set on this website.

Technologies

Mobile optimization

Error! This website is not optimized for mobile devices... It is optimized for devices which have at least 1239px wide display!

Detected applications

	Google Analytics	Analytics
	Google Tag Manager	Tag Managers

Deprecated HTML elements

Good! No deprecated HTML tags are detected.

Redirection (www / not www)

Error! The web address is accessible with and without www!

Deprecated HTML elements

Good! No deprecated HTML tags are detected.

Printability

Suggestion! Unfortunately, no printer-friendly CSS found.

Meta Tag (viewport tag, mobile devices)

Error! The meta tag named viewport is missing.

Speed test

Server response time

The server response time is fast enough.

Loading time

2,599 ms

Table layout

Good! No nested tables found.

Number of HTTP resources

Number of source domains

Render blocking resources

The elements below are blocking the “above the fold” rendering.
List of render blocking css files

http://www.w3school.com.cn/c5_20171220.css

Speed test – Javascript

Javascript

Good! Just a few javascript files are detected on the website.

File size of all javascript files combined

104.62KB

Javascript minifying

Great! The Javascript files are minified.

Speed test – CSS

CSS

Good! Just a few CSS files are used on this website.

http://www.w3school.com.cn/c5.css

File size of all css files combined

25.96KB

CSS minifying

You can save 693B (15% compression) on the analysed URL by minifying the CSS files.

By minifying http://www.w3school.com.cn/c5_20171220.css you can save 693B (15% compression rate)

Speed test – Compression

Uncompressed size of the of the HTML

13.55KB

Gzip compression

Your site uses compression.

Speed test – Browser cache

Number of static resources (image, JS, CSS)

Browser cache

The browser cache is not set correctly for all elements.

URL	Duration
http://www.w3school.com.cn/c5_20171220.css	Expiry time is not specified
http://www.w3school.com.cn/ui2017/alert.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/bg.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/footer.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon10.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon2.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon3.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon4.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon5.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon6.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon7.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon8.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/icon9.png	Expiry time is not specified
http://www.w3school.com.cn/ui2017/wrapper.png	Expiry time is not specified
https://www.googletagmanager.com/gtag/js?id=UA-878633-1	15 minutes
https://www.google-analytics.com/analytics.js	2 hours

Speed test – Images

File size of all images combined

113.99KB

Image optimisation

You can save 23.3KB (22% compression) by optimising the images below:

By lossless compressing the http://www.w3school.com.cn/ui2017/bg.png you can save 12KB (18%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon10.png you can save 4.9KB (32%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon9.png you can save 3.3KB (27%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon5.png you can save 695B (26%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon7.png you can save 631B (24%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon2.png you can save 436B (19%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon4.png you can save 416B (17%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon3.png you can save 358B (19%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon6.png you can save 232B (11%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/icon8.png you can save 149B (34%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/alert.png you can save 133B (29%) data.
By lossless compressing the http://www.w3school.com.cn/ui2017/footer.png you can save 117B (59%) data.

Links

We found a total of 128 different links.
Internal links: 123
External links: 5

External links:

Link text (anchor)	Link strength
Firefox ÖÐÎÄÉçÇø
W3C ÖÐ¹ú×Ü²¿
w3ctech
ÉÏº£Ó®¿ÆÍ¶×ÊÓÐÏÞ¹«Ë¾
ÃÉICP±¸06004630ºÅ

Internal links:

Link text (anchor)	Link strength
w3school ÔÚÏß½Ì³Ì
HTML ÏµÁÐ½Ì³Ì
ä¯ÀÀÆ÷½Å±¾
·þÎñÆ÷½Å±¾
ASP.NET ½Ì³Ì
XML ÏµÁÐ½Ì³Ì
Web Services ÏµÁÐ½Ì³Ì
½¨Õ¾ÊÖ²á
HTML
HTML5
XHTML
CSS
CSS3
TCP/IP
JavaScript
HTML DOM
jQuery
jQuery Mobile
AJAX
JSON
DHTML
E4X
WMLScript
PHP
SQL
ASP
ADO
VBScript
XML
DTD
XML DOM
XSL
XSLT
XSL-FO
XPath
XQuery
XLink
XPointer
Schema
XForms
WAP
SVG
Web Services
WSDL
SOAP
RSS
RDF
ASP.NET
Web Pages
Razor
MVC
Web Forms
ÍøÕ¾¹¹½¨
ÍòÎ¬ÍøÁªÃË (W3C)
ä¯ÀÀÆ÷ÐÅÏ¢
ÍøÕ¾Æ·ÖÊ
ÓïÒåÍø
Ö°Òµ¹æ»®
ÍøÕ¾Ö÷»ú
ÍøÂçÃ½Ìå
¹ØÓÚ W3School
°ïÖú W3School
ÍøÕ¾¹¹½¨³õ¼¶½Ì³Ì
ÍøÕ¾¹¹½¨¸ß¼¶½Ì³Ì
CSS3 ²Î¿¼ÊÖ²á
²Î¿¼ÊÖ²á£ºPHP Calendar º¯Êý
²Î¿¼ÊÖ²á£ºPHP Date / Time º¯Êý
½Ì³Ì£ºHTML ½Ì³Ì
HTML/HTML5 ±êÇ©
HTML ÑÕÉ«
CSS 1,2,3
JavaScript
HTML DOM
jQuery
jQuery Mobile
VBScript
ASP
ADO
ASP.NET
PHP 5.1
XML DOM
XSLT 1.0
XPath 2.0
XSL-FO
WML 1.1
W3C ÊõÓï±í
HTML ×Ö·û¼¯
HTML ASCII
HTML ISO-8859-1
HTML ·ûºÅ
HTML ÊµÀý
CSS ÊµÀý
XML ÊµÀý
JavaScript ÊµÀý
JavaScript ¶ÔÏóÊµÀý
HTML DOM ÊµÀý
jQuery ÊµÀý
jQuery Mobile ÊµÀý
XML DOM ÊµÀý
DHTML ÊµÀý
AJAX ÊµÀý
VBScript ÊµÀý
ASP ÊµÀý
ADO ÊµÀý
SVG ÊµÀý
WAP ÊµÀý
HTML ²âÑé
HTML5 ²âÑé
XHTML ²âÑé
CSS ²âÑé
XML ²âÑé
JavaScript ²âÑé
jQuery ²âÑé
SQL ²âÑé
ASP ²âÑé
PHP ²âÑé
ÑéÖ¤HTML
ÑéÖ¤CSS
ÑéÖ¤XHTML
ÑéÖ¤XML
ÑéÖ¤WML
Ê¹ÓÃÌõ¿î
ÒþË½Ìõ¿î

Website security

121.40.44.206

External hidden links

Good! No hidden external links found

Looking for eval()

Good! No eval(bas64_decode()) scripts are found

Checking for XSS vulnerability

No XSS vulnerability found

Email encryption

Good! We have not found any unencrypted email addresses.

Icons

Favicon

Good! The website uses favicon.

Order of Heading elements on mobile by position

H1 : w3school 在线教程, ( 0px from top )
H2 : HTML 教程, ( 158px from top )
H2 : 浏览器脚本, ( 333px from top )
H2 : 服务器脚本, ( 580px from top )
H2 : XML 教程, ( 731px from top )
H2 : Web Services, ( 1098px from top )
H2 : .NET, ( 1249px from top )

Typos

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SEO report of w3school.com.cn