Tools & Wizards About Us
mail.163.com screenshot

Report Summary

  • 48

    Performance

    Renders faster than
    66% of other websites

  • 55

    Accessibility

    Visual factors better than
    that of 23% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

mail.163.com

163网易免费邮-你的专业电子邮局

Page Load Speed

10.9 sec in total

First Response

1.2 sec

Resources Loaded

9.6 sec

Page Rendered

90 ms

mail.163.com screenshot

About Website

Welcome to mail.163.com homepage info - get ready to check Mail 163 best content for China right away, or after learning these important things about mail.163.com

网易163免费邮箱，你的专业电子邮局，注册用户数超10亿，专业稳定安全。网易邮箱官方App“邮箱大师”帮您高效处理邮件，支持所有邮箱，并可在手机、Windows和Mac上多端协同使用。

Visit mail.163.com

Key Findings

We analyzed Mail.163.com page load time and found that the first response time was 1.2 sec and then it took 9.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

mail.163.com performance score

48

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.6 s

5/100

10%

LCP (Largest Contentful Paint)

Value8.2 s

2/100

25%

SI (Speed Index)

Value8.8 s

16/100

10%

TBT (Total Blocking Time)

Value260 ms

83/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value7.2 s

51/100

10%

Network Requests Diagram

mail.163.com

1184 ms

mail.163.com

1110 ms

message.js

1254 ms

es5-polyfill.js

1350 ms

bundle.tracing.min.js

1599 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 21% of them (8 requests) were addressed to the original Mail.163.com, 42% (16 requests) were made to Mimg.127.net and 11% (4 requests) were made to Urswebzj.nosdn.127.net. The less responsive or slowest element that took the longest time to load (3.3 sec) relates to the external source Dl.reg.163.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 31.4 kB (10%)

Content Size

314.8 kB

After Optimization

283.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Mail.163.com main page is 314.8 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 220.1 kB which makes up the majority of the site volume.

HTML Optimization

-56%

Potential reduce by 30.0 kB

  • Original 53.6 kB
  • After minification 53.3 kB
  • After compression 23.6 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 30.0 kB or 56% of the original size.

Image Optimization

-2%

Potential reduce by 29 B

  • Original 1.4 kB
  • After minification 1.4 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 163 images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 1.0 kB

  • Original 220.1 kB
  • After minification 220.1 kB
  • After compression 219.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-1%

Potential reduce by 392 B

  • Original 39.7 kB
  • After minification 39.7 kB
  • After compression 39.3 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.163.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 13 (43%)

Requests Now

30

After Optimization

17

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Mail 163. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

mail.163.com

mail.163.com

1184 ms

mail.163.com

mail.163.com

1110 ms

message.js

message.js

1254 ms

es5-polyfill.js

es5-polyfill.js

1350 ms

bundle.tracing.min.js

bundle.tracing.min.js

1599 ms

style.20c4fa9e52b0c313a6ad.css

style.20c4fa9e52b0c313a6ad.css

1641 ms

year.js

year.js

1379 ms

mailad-sdk-0.0.19.js

mailad-sdk-0.0.19.js

1707 ms

mailscanlogin-1.2.3.js

mailscanlogin-1.2.3.js

1893 ms

index-0.0.1.js

index-0.0.1.js

1661 ms

index-promote.js

index-promote.js

1898 ms

vendors~126~163~yeah.d682f31523baefee0c00.js

vendors~126~163~yeah.d682f31523baefee0c00.js

2133 ms

163.473c3229b5a4d9b8eb71.js

163.473c3229b5a4d9b8eb71.js

1916 ms

t.gif

t.gif

336 ms

gonganlogo.png

gonganlogo.png

356 ms

detail

detail

279 ms

login_index.json

login_index.json

302 ms

39628e5a6146f059949210bebf88d697.png

39628e5a6146f059949210bebf88d697.png

1176 ms

getConf

getConf

2083 ms

config.do

config.do

536 ms

form3

form3

1225 ms

loading_s.gif

loading_s.gif

275 ms

index_dl2_new.html

index_dl2_new.html

3332 ms

fingerprint-2.1.2.min.js

fingerprint-2.1.2.min.js

290 ms

i

i

1672 ms

init

init

606 ms

get.do

get.do

329 ms

get.do

get.do

586 ms

stat.gif

stat.gif

1790 ms

54d46d33-810a-4f3d-9e14-a8671608feeb

54d46d33-810a-4f3d-9e14-a8671608feeb

1780 ms

preload6.htm

preload6.htm

275 ms

i

i

247 ms

i

i

490 ms

i

i

248 ms

urs.163.918051fb.css

urs.163.918051fb.css

278 ms

webzjconf.js

webzjconf.js

176 ms

fingerprint2.min-1.6.1.js

fingerprint2.min-1.6.1.js

383 ms

pp_index_dl_9d10a0e93c13e629e99c5fb42a18350d.js

pp_index_dl_9d10a0e93c13e629e99c5fb42a18350d.js

992 ms

Accessibility Review

mail.163.com accessibility score

55

Accessibility Issues

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.163.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

mail.163.com SEO score

92

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    ZH

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Mail.163.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it matches the claimed language. Our system also found out that Mail.163.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.163.com

Open Graph description is not detected on the main page of Mail 163. 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: