Tools & Wizards About Us
tsa.cn screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

tsa.cn

联合信任时间戳-电子证据_电子合同、签名、签约认证_知识产权、版权保护服务中心

Page Load Speed

8.5 sec in total

First Response

724 ms

Resources Loaded

6.9 sec

Page Rendered

851 ms

tsa.cn screenshot

About Website

Welcome to tsa.cn homepage info - get ready to check Tsa best content for China right away, or after learning these important things about tsa.cn

联合信任时间戳服务中心是提供电子证据、电子合同、电子签名、签约司法认证和证据保全、固化服务的公司，还有版权保护、知识产权保护、商业秘密保护、等服务内容。其权利卫士App和时间戳服务，19年来积累10w+成功判例，司法认可和10w+律师取证、固证的选择！欢迎来电：400-0186-091

Visit tsa.cn

Key Findings

We analyzed Tsa.cn page load time and found that the first response time was 724 ms and then it took 7.8 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

tsa.cn performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value35.0 s

0/100

25%

SI (Speed Index)

Value33.1 s

0/100

10%

TBT (Total Blocking Time)

Value1,820 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0.007

100/100

15%

TTI (Time to Interactive)

Value41.5 s

0/100

10%

Network Requests Diagram

tsa.cn

724 ms

www.tsa.cn

1776 ms

swiper.min.css

687 ms

common.css

715 ms

components.css

709 ms

Our browser made a total of 177 requests to load all elements on the main page. We found that 40% of them (70 requests) were addressed to the original Tsa.cn, 35% (62 requests) were made to Tsa-public-pro.oss-cn-beijing.aliyuncs.com and 22% (39 requests) were made to Tsa-content.oss-cn-beijing.aliyuncs.com. The less responsive or slowest element that took the longest time to load (3.6 sec) relates to the external source Tsa-content.oss-cn-beijing.aliyuncs.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 847.6 kB (17%)

Content Size

5.1 MB

After Optimization

4.2 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Tsa.cn main page is 5.1 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 55% of websites need less resources to load. Images take 4.5 MB which makes up the majority of the site volume.

HTML Optimization

-90%

Potential reduce by 393.5 kB

  • Original 438.1 kB
  • After minification 240.6 kB
  • After compression 44.6 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. This page needs HTML code to be minified as it can gain 197.5 kB, which is 45% 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 393.5 kB or 90% of the original size.

Image Optimization

-9%

Potential reduce by 385.3 kB

  • Original 4.5 MB
  • After minification 4.1 MB

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. Tsa images are well optimized though.

JavaScript Optimization

-35%

Potential reduce by 68.9 kB

  • Original 194.4 kB
  • After minification 194.4 kB
  • After compression 125.5 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 68.9 kB or 35% of the original size.

Requests Breakdown

Number of requests can be reduced by 99 (58%)

Requests Now

170

After Optimization

71

  • Images
  • JavaScript
  • CSS

The browser has sent 170 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Tsa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

tsa.cn

tsa.cn

724 ms

www.tsa.cn

www.tsa.cn

1776 ms

swiper.min.css

swiper.min.css

687 ms

common.css

common.css

715 ms

components.css

components.css

709 ms

viewer.min.css

viewer.min.css

708 ms

video.min.css

video.min.css

718 ms

home.css

home.css

938 ms

awsc.js

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296 ms

jquery.min.js

jquery.min.js

470 ms

browser-polyfill.min.js

browser-polyfill.min.js

754 ms

zhugeSdk.js

zhugeSdk.js

751 ms

jquery.lazyload.min.js

jquery.lazyload.min.js

750 ms

jquery_extend.js

jquery_extend.js

751 ms

swiper.min.js

swiper.min.js

752 ms

viewer.min.js

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753 ms

video.min.js

video.min.js

1402 ms

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751 ms

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751 ms

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936 ms

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946 ms

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1070 ms

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Accessibility Review

tsa.cn accessibility score

83

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

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

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

tsa.cn best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

tsa.cn SEO score

90

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

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

    ZH

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tsa.cn 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 Tsa.cn 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

tsa.cn

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