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51zzt.com screenshot

Report Summary

  • 56

    Performance

    Renders faster than
    73% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

51zzt.com

天辰平台|天辰注册|天辰登录

Page Load Speed

15.7 sec in total

First Response

1.7 sec

Resources Loaded

13.8 sec

Page Rendered

223 ms

51zzt.com screenshot

About Website

Welcome to 51zzt.com homepage info - get ready to check 51 Zzt best content right away, or after learning these important things about 51zzt.com

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Visit 51zzt.com

Key Findings

We analyzed 51zzt.com page load time and found that the first response time was 1.7 sec and then it took 14 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

51zzt.com performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value13.5 s

0/100

25%

SI (Speed Index)

Value6.5 s

38/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value8.5 s

38/100

10%

Network Requests Diagram

51zzt.com

1686 ms

common.css

437 ms

base.js

1422 ms

common.js

695 ms

form.js

781 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 81% of them (35 requests) were addressed to the original 51zzt.com, 19% (8 requests) were made to V001.2799x.cn. The less responsive or slowest element that took the longest time to load (11.3 sec) relates to the external source V001.2799x.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 161.6 kB (19%)

Content Size

868.9 kB

After Optimization

707.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51zzt.com main page is 868.9 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. Images take 699.8 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 32.6 kB

  • Original 38.6 kB
  • After minification 37.4 kB
  • After compression 6.0 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 32.6 kB or 84% of the original size.

Image Optimization

-5%

Potential reduce by 36.5 kB

  • Original 699.8 kB
  • After minification 663.3 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. 51 Zzt images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 85.3 kB

  • Original 120.5 kB
  • After minification 104.0 kB
  • After compression 35.1 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 85.3 kB or 71% of the original size.

CSS Optimization

-72%

Potential reduce by 7.2 kB

  • Original 10.0 kB
  • After minification 8.2 kB
  • After compression 2.8 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. 51zzt.com needs all CSS files to be minified and compressed as it can save up to 7.2 kB or 72% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (46%)

Requests Now

41

After Optimization

22

  • Images
  • JavaScript
  • CSS

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Zzt. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

51zzt.com

51zzt.com

1686 ms

common.css

common.css

437 ms

base.js

base.js

1422 ms

common.js

common.js

695 ms

form.js

form.js

781 ms

blockui.js

blockui.js

815 ms

advsheadlb.css

advsheadlb.css

653 ms

advsheadlb.js

advsheadlb.js

839 ms

topmenu.css

topmenu.css

873 ms

menu.css

menu.css

912 ms

tempclass.css

tempclass.css

793 ms

newslist.css

newslist.css

595 ms

templistall.css

templistall.css

615 ms

F.css

F.css

574 ms

7102_s.jpg

7102_s.jpg

11252 ms

7101_s.jpg

7101_s.jpg

7449 ms

7100_s.jpg

7100_s.jpg

2856 ms

3177_s.jpg

3177_s.jpg

2886 ms

3175_s.jpg

3175_s.jpg

7222 ms

3178_s.jpg

3178_s.jpg

4262 ms

3176_s.jpg

3176_s.jpg

6545 ms

3179_s.jpg

3179_s.jpg

5020 ms

6.gif

6.gif

528 ms

1247712353.jpg

1247712353.jpg

2148 ms

1247712359.jpg

1247712359.jpg

2260 ms

1247712380.jpg

1247712380.jpg

2110 ms

1247712387.jpg

1247712387.jpg

1873 ms

1454288344.png

1454288344.png

324 ms

submit.png

submit.png

704 ms

b7.gif

b7.gif

898 ms

b5.gif

b5.gif

1015 ms

b8.gif

b8.gif

1145 ms

1247710831.jpg

1247710831.jpg

1373 ms

menu.jpg

menu.jpg

1795 ms

line.jpg

line.jpg

1802 ms

diy.jpg

diy.jpg

3618 ms

titlebg.jpg

titlebg.jpg

2068 ms

li.gif

li.gif

2115 ms

pwbutton.gif

pwbutton.gif

2320 ms

titlebg.jpg

titlebg.jpg

2313 ms

li.gif

li.gif

2323 ms

tpbg.jpg

tpbg.jpg

2337 ms

top.png

top.png

2410 ms

Accessibility Review

51zzt.com accessibility score

62

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

51zzt.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

51zzt.com SEO score

83

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

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

High

Tap targets are not sized appropriately

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 51zzt.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 51zzt.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

51zzt.com

Open Graph description is not detected on the main page of 51 Zzt. 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: