Tools & Wizards About Us
mail.21cn.com screenshot

Report Summary

  • 0

    Performance

  • 69

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

mail.21cn.com

21CN个人邮箱

Page Load Speed

8.1 sec in total

First Response

534 ms

Resources Loaded

7.5 sec

Page Rendered

112 ms

mail.21cn.com screenshot

About Website

Visit mail.21cn.com now to see the best up-to-date Mail 21 Cn content for China and also check out these interesting facts you probably never knew about mail.21cn.com

21CN免费邮箱--中文电子邮箱著名品牌之一。大容量，免费开通手机号码邮，10G超大空间。支持PC、手机、平板的客户端收发电子邮件。清新界面-高效杀毒-积分有奖活动。

Visit mail.21cn.com

Key Findings

We analyzed Mail.21cn.com page load time and found that the first response time was 534 ms and then it took 7.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

mail.21cn.com performance score

0

Network Requests Diagram

mail.21cn.com

534 ms

mail.21cn.com

872 ms

237 ms

getJs.js

1253 ms

login.css

237 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 61% of them (14 requests) were addressed to the original Mail.21cn.com, 30% (7 requests) were made to Static.e.189.cn and 4% (1 request) were made to Ux.21cn.com. The less responsive or slowest element that took the longest time to load (2.3 sec) relates to the external source Static.e.189.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 146.2 kB (65%)

Content Size

223.9 kB

After Optimization

77.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Mail.21cn.com main page is 223.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Javascripts take 201.9 kB which makes up the majority of the site volume.

HTML Optimization

-65%

Potential reduce by 6.0 kB

  • Original 9.4 kB
  • After minification 8.4 kB
  • After compression 3.3 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 983 B, which is 11% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 6.0 kB or 65% of the original size.

Image Optimization

-0%

Potential reduce by 27 B

  • Original 9.2 kB
  • After minification 9.2 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Mail 21 Cn images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 139.9 kB

  • Original 201.9 kB
  • After minification 201.9 kB
  • After compression 62.0 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 139.9 kB or 69% of the original size.

CSS Optimization

-5%

Potential reduce by 184 B

  • Original 3.4 kB
  • After minification 3.4 kB
  • After compression 3.2 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Mail.21cn.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 6 (30%)

Requests Now

20

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mail 21 Cn. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

mail.21cn.com

mail.21cn.com

534 ms

mail.21cn.com

mail.21cn.com

872 ms

237 ms

getJs.js

getJs.js

1253 ms

login.css

login.css

237 ms

common.js

common.js

472 ms

jquery.fix.xss.js

jquery.fix.xss.js

1505 ms

jquery.js

jquery.js

1118 ms

redirectToWap.js

redirectToWap.js

698 ms

getAllDynamicConfig.do

getAllDynamicConfig.do

406 ms

logo_2016.gif

logo_2016.gif

449 ms

banner.jpg

banner.jpg

1268 ms

gonggao-ico.gif

gonggao-ico.gif

631 ms

login_bg.png

login_bg.png

674 ms

dxlogo.gif

dxlogo.gif

854 ms

unifyAccountLogin.do

unifyAccountLogin.do

1400 ms

loginBox.css

loginBox.css

1284 ms

jquery-1.11.3.min.js

jquery-1.11.3.min.js

1823 ms

platformlogin.js

platformlogin.js

2262 ms

logo.png

logo.png

754 ms

icon-success.png

icon-success.png

783 ms

iconAlert.png

iconAlert.png

258 ms

loading.gif

loading.gif

246 ms

Accessibility Review

mail.21cn.com accessibility score

69

Accessibility Issues

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

mail.21cn.com best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

mail.21cn.com SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Mail.21cn.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Mail.21cn.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

mail.21cn.com

Open Graph description is not detected on the main page of Mail 21 Cn. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: