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comprehensive website review & analysis

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socialSocial
backlinksBacklinks
visitorsVisitors
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usabilityUsability
SEOSEO
mobileMobile
performancePerformance
SEO-AuthoritySEO-Authority
securitySecurity

Report for csdn.net

iwebchk

  • screenshot of csdn.net
  • Score:

    51.7%

    3.07
    Progress:
    100%
    Generated on Monday, June 20th 2016 10:16 pm
    06/20/2016

Top Priorities

list
Please SUBSCRIBE to see the full list of personalized tasks.
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Traffic Rank

visitors
283 most visited website in the World Trend: down (+139)
53 most visited website in CN China
Traffic Rank is provided by Alexa

Visitors Localization

visitors
Low map legend High
CountryPercentDomain (ccTLD)Status
CN China95.6%csdn.cnNot available.
US United States1.3%csdn.usNot available.
TW Taiwan1.0%csdn.twNot available.
Registering country code top level domains (ccTLD) can prevent potential competitors from taking advantage of your primary domain reputation. It is also one of the ways to improve country specific SEO and performance. (http://www.searchenginejournal.com/seo-without-boarders-a-guide-to-international-seo-nick-paterman/60092/)

Images

accessibilitySEO-content
We have located images with missing ALT attribute.
Number of images: 28
Missing alt tag: 28

List of images with missing ALT attributes:

  • http://images.csdn.net/20160621/44.jpg
  • http://images.csdn.net/20160614/QQ截图2016061415204601.png
  • http://images.csdn.net/20160606/专题图标2.jpg
  • http://avatar.csdn.net/9/D/5/1_jmilk.jpg
  • http://avatar.csdn.net/1/0/4/1_shakespeare001.jpg
  • http://avatar.csdn.net/0/1/6/1_crazy1235.jpg
  • http://avatar.csdn.net/5/6/E/1_luoshengyang.jpg
  • http://avatar.csdn.net/2/9/9/1_fansunion.jpg
  • http://images.csdn.net/20160621/safety-zone-600x450-100522097-primary-idge.jpg
  • http://images.csdn.net/20160620/201501080056201415 (1).jpg
  • http://images.csdn.net/20160527/2140.jpg
  • http://images.csdn.net/20160616/201605131730362346.jpg
  • http://img.knowledge.csdn.net/upload/base/1466132253931_931.jpg
  • http://img.knowledge.csdn.net/upload/base/1465887837340_340.jpg
  • http://img.knowledge.csdn.net/upload/base/1464938192555_555.jpg
  • http://img.knowledge.csdn.net/upload/base/1464683375884_884.jpg
  • http://img.knowledge.csdn.net/upload/base/1464164053876_876.jpg
  • http://public.download.csdn.net/uploads_album/2016/06/05/fefbcf2411899ae9c8d...jpg
  • http://public.download.csdn.net/uploads_album/2016/05/24/7346224e22101f77a1e...jpg
  • http://public.download.csdn.net/uploads_album/2016/05/21/34cf2ad3969368538f6...jpg
  • http://public.download.csdn.net/uploads_album/2016/05/15/ab4a97e6c458dc9ea2d...jpg
  • http://public.download.csdn.net/uploads_album/2016/05/13/d55e588509f60fe84f1...jpg
  • http://images.csdn.net/20160531/程序员1606封面(1)_副本.jpg
  • http://c.csdnimg.cn/www/images/pic_foot_gongshang.png
  • http://c.csdnimg.cn/www/images/pic_foot_BNIA.png
  • http://c.csdnimg.cn/www/images/pic_foot_report.png
  • http://c.csdnimg.cn/www/images/pic_foot_report110.png
  • http://c.csdnimg.cn/www/images/ali.png
The "alt" attribute provides a text equivalent for the image. If the browser cannot display an image the alt description will be given in its place. Furthermore, some visitors cannot see images as they might be blind in which the alt tag provides a valuable image description. Finally, search engines utilize the alt attribute for image search indexing. (www.w3.org/QA/Tips/altAttribute)

Title

SEO-content
We have found following title:

"CSDN.NET - 全球最大中文IT社区,为IT专业技术人员提供最全面的信息传播和服务平台"

Length: 46 characters
The <TITLE> element provides a short piece of text describing the document. The title is very important as it shows in the window title bars, bookmarks and search results. Title should be between 60 to 80 characters long. (www.w3.org/QA/Tips/good-titles)

Description Metatag

SEO-content
No Description Found.
The description attribute should provide a concise explanation of a Web page's content. Also, the description is often displayed on search engine results and can indirectly affect page ranking. (en.wikipedia.org/wiki/Meta_element#The_description_attribute)

Keywords Metatag

SEO-content
No Keywords Found.
The keywords attribute was utilized by search engines to provide more accurate search results. Due to the over usage and spamming the keywords attribute has been phased out and is no longer relevant. Google doesn't use the "keywords" meta tag in web search ranking.(googlewebmastercentral.blogspot.se/2009/09/google-does-not-use-keywords-meta-tag.html)

Text to HTML Ratio

SEO-content
The Text to HTML ratio is 15.58%
Original content is by far the single most important element to search engines. Low Text to HTML ratio indicates little content for search engines to index. We consider it to be good practice to have a Text to HTML ratio of at least 10% and ideal above 20%

Keyword Density & Consistency

SEO-content
Consistent Keywords % Density # Count T Title D Desc. H <H> A ALT B <b>
20162.30%10--9--
net1.15%51----
openstack1.15%5--1--
days0.92%4--1--
csdn0.69%31----
移动客户端0.69%3--1--
极客头条0.69%3--1--
aws0.69%3-----
数据库0.69%3-----
django0.46%2--1--
openstack days0.69%3--1--
days china大会0.23%1--1--
2016 开源中国开源世界高峰论坛最新日程公布0.23%1--1--
django web开发入门0.23%1--1--
python django0.23%1--1--
days china大会 |首批演讲嘉宾和日程公布0.23%1--1--
python django web开发入门0.23%1--1--
openstack days china大会0.23%1--1--
mesos、marathon、docker环境的 jenkins 持续集成及配置管理0.23%1--1--
netflix的推荐算法究竟有多牛?根据netflix产品创新副总裁carlos uribe-gomez和首席产品官neil hunt的一份报告,算法能够为netflix节省每年10亿美元。0.23%1-----
Keywords density and consistency are notable factors for optimal page SEO. Preferred keywords should have higher keywords density indicating their importance. Optimally, preferred keywords should also be consistently utilized in multiple essential areas of the page such as title, description meta tag, h1 through h6 headings, alt image attributes, backlinks and internal links anchor text. Keyword density of above 5% is a good indication that the word or phrase appears too many time in the content. (more information)

Frames

accessibilitySEO-content
No frames detected.
It is not recommended to use frames or iframes because they can cause problems for search engines. It is best to avoid frames and inline frames whenever possible (searchenginewatch.com/article/2064573/Search-Engines-and-Frames). If frames must be utilized consider <noframes> tag. (www.w3schools.com/tags/tag_noframes.asp).

Flash

accessibilitytechnologySEO-content
No flash detected.
Flash and other reach-media technologies should primarily be utilized for decorative purposes. This makes your site more search engine friendly and improves accessibility (support.google.com/webmasters/bin/answer.py?hl=en&answer=72746#1).

Headings

SEO-content
  • 0 <H1>
  • 15 <H2>
    • 极客头条
    • 专题
    • 推荐博客
    • 程序人生
    • 最热下载
    • 滚动
    • 定制你的个性CSDN内容快速入口
    • CSDN学院 精品课程
    • 查看更多知识库 CSDN知识库
    • 如何发布我的活动活动日历
    • 行业热点
    • 下载专辑
    • 查看更多课程传智播客
    • 我要订阅程序员
    • 订阅技术邮件
  • 20 <H3>
    • 【每周1小时】直播:Python大型网络爬虫项目开发实战
    • 小米宋强:生态化大数据平台的深度应用实践
    • 【CSDN技术主题月】移动信息安全技术沙龙等你来!
    • 2008-2016年 历届中国大数据技术大会(BDTC)回顾
    • 中国移动获得OpenStack Summit超级用户大奖
    • 加密数字货币的开发技术介绍
    • VR 应用设计的 8 个建议
    • 训练神经网络的五大算法
    • 2016中国大数据技术大会六折抢票最后一周(附部分讲师名单)
    • 探讨增强现实(AR)基于模型的追踪技术
    • 巨人网络胡远星:云计算驱动游戏产业腾飞
    • SDCC讲师、知名JS专家周爱民:有前端思想的物联网系统架构
    • 通用机器学习流程与问题解决架构模板
    • 月度开发者Manoharan Ramachandran:道路安全应用Drowsy Driver的骁龙处理器开发经验
    • 【CSDN英雄会】易宝支付架构师程超:走在Java的路上
    • Erlang之父Joe Armstrong确认将参加中国软件开发者大会
    • 深入了解 Messenger 的实现细节
    • 不止是企业网盘,亿方云聚焦数据战略的背后
    • 让页面滑动流畅得飞起的新特性:Passive Event Listeners
    • 聚焦热门框架、架构、工程化 SDCC前端专题讲师强大阵容曝光
  • 20 <H4>
    • 内容
    • 社区
    • 服务
    • 移动客户端
    • 思科CCNA培训全部视频课程
    • Node.js + Expressjs + React.js + mongoosejs 开发实战
    • 2016软考网络工程师视频实验课程
    • Hive知识库
    • Objective-C知识库
    • 区块链知识库
    • 深度学习知识库
    • React Native知识库
    • 2016/11/03 在线
    • 2016/11/10 北京
    • 2016/11/18 北京
    • 2016/11/26 北京
    • 2016/12/08 北京
    • 2016/12/31 在线
    • 核心技术类目
    • 感受CSDN丰富的服务
  • 0 <H5>
  • 0 <H6>
The <h1> to <h6> tags are used to define HTML headings. The <h1> tag should hold the title describing the content of a specific page therefore only one h1 tag is needed per page. There can be any number of h2 - h6 tags but they should be added in order of importance (www.w3schools.com/tags/tag_hn.asp).

Doctype

technologyvalidity
HTML 5
The <!DOCTYPE> declaration tells the web browser about what version of HTML the page is written in. It is good practice to always add the <!DOCTYPE> declaration to the HTML documents, so that the browser knows what type of document to expect. (www.w3schools.com/tags/tag_DOCTYPE.asp)

Character Encoding

technologyvalidity
UTF-8 (Unicode)
Covers: Worldwide
To display an HTML page correctly, the browser must know what character-set to use (en.wikipedia.org/wiki/Character_encodings_in_HTML).

Language

usability
Declared Language: None
Language Attribute: None
The HTML "lang" attributes and language metatag define the base language to be used for displaying text and characters on a Website. www.mcanerin.com/en/articles/meta-language.asp

W3C Markup Validation

validity
Status: FAILED [72 errors, 3 warning(s)]
It is good practice to use valid HTML/XHTML markup as it ensures that the search engines can read the website correctly as well as it improves cross browser compatibility (W3C Markup Validation Service).

Deprecated HTML elements

technologyvalidity
Good, no deprecated elements found.
A deprecated element is one that has been outdated by newer constructs. Deprecated elements may become obsolete in future versions of HTML so it is recommended not to use them. (webdesign.about.com/od/htmltags/a/bltags_deprctag.htm)

Nested HTML Tables

accessibilitytechnology
Great, no nested tables detected.
In general it is not recommended to use nested tables or to utilize tables for page layout. Nested tables are known to cause performance issues due to increased HTML size and rendering time. It is better to use CSS layout instead.

Web Analytics

technology
Yes, we have detected following web analytics tools:
  • Google analytics icon Google™ Analytics
Web Analytics Tools collect and measure information about visitor activity on a website. Well interpreted web traffic data is invaluable in determining a successfully web strategy and assessing the effectiveness of a website. At a minimum, we recommend to utilize at least one web analytics tool.

robots.txt

SEO
A robots.txt file restricts access to your site by search engine robots that crawl the web. (www.robotstxt.org/robotstxt.html)

XML Sitemap

SEO
Sitemaps inform search engines about pages available for crawling. In its simplest form, a Sitemap is an XML file that lists URLs for a site along with additional metadata about each URL. XML sitemap should help search engines to crawl the site more intelligently. (http://www.sitemaps.org/protocol.html)

Mobile Rendering

mobile
Mobile internet usage has been exceeding PC's since 2014 and growing so it is critical for pages to render correctly on mobile devices.

Mobile Optimization

mobileperformanceSEO
Mobile PageSpeed analyzes webpages and evaluates its performance while providing suggestions on reducing page load times. Google is incorporating website speed in search ranking (http://www.mattcutts.com/blog/site-speed)

Mobile Experience

mobileusability
Mobile users have now become a critical part of online visits. Making the website mobile friendly is no longer an option but rather necessity. (https://developers.google.com/webmasters/smartphone-sites/)

Favicon

usability
favicon
file: http://c.csdnimg.cn/public/favicon.ico
size: 64px  by  64px
type: image/x-icon
The Favicon is a small icon associated with a website. The Favicon is important because it is displayed next to the website's URL in the address bar of the browser as well as in bookmarks and shortcuts. (en.wikipedia.org/wiki/Favicon)

Custom 404 Error Page

usability
No custom 404 error page detected.

Warning: Soft 404 error detected redirecting to http://www.csdn.net/404error.

A 404 is a standard http response code for a resource that cannot be located on the server. Webservers usually return a "404 Not Found" error page for non-existing pages. Unfortunately, these default error pages are very generic and a not very user friendly, therefore, using a custom 404 error page is highly recommended.

Process of returning http status code "200 OK" for a non-existent page or redirecting users to another url is called soft 404. Soft 404 errors are problematic for search engines and are not advisable. (https://support.google.com/webmasters/answer/181708)

Printability

usability
Great, you are using print-friendly CSS:
Print-friendly pages are designed to fit on an 8.5"x11" or A4 sheet and usually include only the content of the page, along with source information. (webdesign.about.com/od/printerfriendly/a/aa041403a.htm)

W3C CSS Validation

validity
Status: FAILED [19 error(s)]
It is recommended to use valid CSS to ensure that the website displays correctly. (W3C CSS Validation Service).

Domain Age

SEO-Authority
Your domain was registerd for the first time: 17 years, 7 months, 19 days ago.
Age of the domain is one of the many signals that search engines utilize for ranking. Brand new domains generally have more difficult time to rank high for the first few months. (http://www.coconutheadphones.com/does-domain-agematter)

Domain Expiration

SEO-Authority
Your domain expires in: 4 months, 8 days, 7 hours.
Domain expiration far in to the future is considered a good practice as it promotes confidence in your website, decreases chances of losing domain and in certain cases might help with search engine ranking. (http://www.hover.com/blog/three-reasons-to-renew-your-domain-names-for-five-years)

IP Canonicalization

SEO
No, your site's IP 101.201.172.229 does not redirect to csdn.net.
Some web spiders index websites using IP as well as domain name which can cause duplicate content if there is no IP Canonicalization. (www.mattcutts.com/blog/seo-advice-url-canonicalization)

URL Canonicalization

SEO
Yes, both the www.csdn.net and csdn.net resolve to the same URL.
Warning: Current redirect is "HTTP/1.1 302 Moved Temporarily" but it should be "HTTP/1.1 301 Moved Permanently"
Domain name with WWW and without can be considered as different pages causing duplicate content for search engines. (www.mattcutts.com/blog/seo-advice-url-canonicalization)

Page Speed

performanceSEO
Google Page Speed score: 51% (Low)
Rq. Requests Hst. Hosts LT Load time Html Img Images JS JavaScript CSS F Flash O Other PS Page Size
1162119.33s102.15 KB1.68 MB1.15 MB50.92 KB0 B11.99 KB2.99 MB

RecommendationImpact
Avoid landing page redirects
None
Enable compression
High
Leverage browser caching
High
Reduce server response time
None
Minify CSS
Low
Minify HTML
Low
Minify JavaScript
Medium
Eliminate render-blocking JavaScript and CSS in above-the-fold content
High
Optimize images
High
Prioritize visible content
Low

Subscribe for more details
PageSpeed analyzes webpages and evaluates its performance while providing suggestions on reducing page load times. Google is now incorporating website speed in search ranking (http://www.mattcutts.com/blog/site-speed)

Server Information

security

ISP:
Hangzhou Alibaba Advertising Co.,Ltd.
Server IP:
101.201.172.229
Server Location:
CN ZHEJIANG, Hangzhou

Name Server 1:
ns3.dnsv3.com (111.30.136.110)
Name Server 2:
ns4.dnsv3.com (180.153.162.150)
Your server's IP address and location have minor impact on the country specific SEO. It is recommend to host the website in the country where the number of vistors is desired to be the highest. Search engines take the geolocation of a server into account. (http://www.youtube.com/watch?v=hXt23AXlJJU)

HTTPS (SSL)

security
No HTTPS (SSL) found.
Google™ is now treating HTTPS as a ranking signal. HTTPS is a secure web protocol that allows for encrypted communication between website and the client. HTTPS protocol requires your website to have an SSL certificate, which can be purchased from a Certificate Authority (CA) or SSL vendor. (http://googleonlinesecurity.blogspot.in/2014/08/https-as-ranking-signal_6.html).

Safe Browsing

security
Yes
Safe Browsing is a service provided by Google that enables applications to check URLs against Google's constantly updated lists of suspected phishing and malware pages. (http://www.google.com/safebrowsing/diagnostic?site=csdn.net)

Spam Blacklist

security
Good, your IP is not blacklisted.
Spammer directories provide lists of IPs from which spam distribution is reported. Emails sent from the blocked IPs are subject to closer scrutiny and are much less likely to be delivered. For email campaigns it is recommended to utilize professional email services to ensure that your website IP is not blocked. (www.stopforumspam.com)

Email Address Obfuscation

security
There is 1 email in plain text on the webpage:
  • [email protected]
It is recommended to obfuscate email addresses posted in public. This prevents email addresses from being automatically harvested by spam bots which helps to decrease number of unsolicited emails.

Directory Browsing

security
Great, your server has directory browsing disabled.
Protect Webserver directories from unwanted browsing. To enhance security, directory browsing should be disabled unless you have a specific reason to enable it. If you enable directory browsing, make sure that you only enable it on the particular directory or directories that you want to share. (http://technet.microsoft.com/en-us/library/cc731109)

Whois Privacy

security
Registrant:
Name:
Beijing Chuangxin Lezhi Co.ltd
Organization:
Beijing Chuangxin Lezhi Co.ltd
Address:
B3-2-1 ZHaowei Industry Park, Beijng, 100016, CN
Phone:
+86.1064351432
Fax:
+86.1064348545
Email:
[email protected]
Administrative Contact:
Name:
Tao, Jiang
Organization:
CSDN Holdings. Co. LTD.
Address:
Wangjing SOHO T3 B-1906, Beijing, 100102, CN
Phone:
+86.1064351432
Fax:
+86.1064348545
Email:
[email protected]
Technical Contact:
Name:
Tao, Jiang
Organization:
CSDN Holdings. Co. LTD.
Address:
Wangjing SOHO T3 B-1906, Beijing, 100102, CN
Phone:
+86.1064351432
Fax:
+86.1064348545
Email:
[email protected]
Whois Privacy is a service that prevents domain owner contact information from being displayed in the publicly available Whois records. This can help to cut down on unwanted spam but utilizing Whois privacy should be evaluated against business model and branding strategy.

Server Signature

security
Good, your server does not provide version information.
Attackers can utilize server signature versioning information to their advantage therefore it is recommended to disable it when possible. (Disable server signature for Apache or IIS).

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