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knowbox.cn screenshot

Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

knowbox.cn

小盒课堂

Page Load Speed

12.2 sec in total

First Response

705 ms

Resources Loaded

11.1 sec

Page Rendered

405 ms

knowbox.cn screenshot

About Website

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

小盒课堂是经教育主管部门批准的学科类在线培训服务品牌，面向全国中小学生提供数学、语文、英语等科目在线课程和学习辅导服务。小盒课堂始终秉承“以学习者为中心”的教育理念，始终坚持“做学校教育的有益补充”的定位，为用户提供巩固校内、查缺补漏、拓展思维的课程产品和服务，努力做好“孩子的第二课堂”。

Visit knowbox.cn

Key Findings

We analyzed Knowbox.cn page load time and found that the first response time was 705 ms and then it took 11.5 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

knowbox.cn performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

13/100

10%

LCP (Largest Contentful Paint)

Value9.9 s

0/100

25%

SI (Speed Index)

Value5.8 s

49/100

10%

TBT (Total Blocking Time)

Value550 ms

54/100

30%

CLS (Cumulative Layout Shift)

Value0.028

100/100

15%

TTI (Time to Interactive)

Value7.3 s

49/100

10%

Network Requests Diagram

knowbox.cn

705 ms

knowbox.cn

1038 ms

websdk.js

1006 ms

chunk-vendors.eb656a9a.css

307 ms

app.116fc456.css

535 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 50% of them (13 requests) were addressed to the original Knowbox.cn, 19% (5 requests) were made to Appd.knowbox.cn and 19% (5 requests) were made to Susuanqiniu.knowbox.cn. The less responsive or slowest element that took the longest time to load (7.6 sec) relates to the external source Appd.knowbox.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 62.0 kB (4%)

Content Size

1.7 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Knowbox.cn main page is 1.7 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. 20% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 24.1 kB

  • Original 30.0 kB
  • After minification 29.8 kB
  • After compression 5.9 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 24.1 kB or 80% of the original size.

Image Optimization

-2%

Potential reduce by 31.4 kB

  • Original 1.3 MB
  • After minification 1.3 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. Knowbox images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 2.8 kB

  • Original 311.3 kB
  • After minification 311.3 kB
  • After compression 308.4 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

-11%

Potential reduce by 3.6 kB

  • Original 32.3 kB
  • After minification 32.3 kB
  • After compression 28.7 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. Knowbox.cn needs all CSS files to be minified and compressed as it can save up to 3.6 kB or 11% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (38%)

Requests Now

24

After Optimization

15

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Knowbox. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

knowbox.cn

knowbox.cn

705 ms

knowbox.cn

knowbox.cn

1038 ms

websdk.js

websdk.js

1006 ms

chunk-vendors.eb656a9a.css

chunk-vendors.eb656a9a.css

307 ms

app.116fc456.css

app.116fc456.css

535 ms

chunk-vendors.10cab1a7.js

chunk-vendors.10cab1a7.js

1679 ms

app.16bb8f40.js

app.16bb8f40.js

720 ms

xhkt-wechat.jpeg

xhkt-wechat.jpeg

1532 ms

info

info

268 ms

cubex2.png

cubex2.png

548 ms

Productsx2.png

Productsx2.png

928 ms

Charity@2x-new-1.png

Charity@2x-new-1.png

2458 ms

nextx2.png

nextx2.png

7608 ms

xhkt-logo-pc.png

xhkt-logo-pc.png

1356 ms

product_xhkt.jpg

product_xhkt.jpg

1778 ms

upload_app.png

upload_app.png

1653 ms

upload_pc_icon.png

upload_pc_icon.png

1580 ms

kbofficehome1683527865963.jpg

kbofficehome1683527865963.jpg

2414 ms

kbofficehome1684221159068.jpg

kbofficehome1684221159068.jpg

3188 ms

banner31617855345334.png

banner31617855345334.png

4107 ms

about.83d4be8b.css

about.83d4be8b.css

244 ms

chunk-0187d76a.3a02eaa3.css

chunk-0187d76a.3a02eaa3.css

267 ms

chunk-8ce27034.8d123e4c.css

chunk-8ce27034.8d123e4c.css

223 ms

about.e86b9109.js

about.e86b9109.js

245 ms

chunk-0187d76a.6f37bfe9.js

chunk-0187d76a.6f37bfe9.js

237 ms

chunk-8ce27034.e2d6f80f.js

chunk-8ce27034.e2d6f80f.js

225 ms

Accessibility Review

knowbox.cn accessibility score

76

Accessibility Issues

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

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

knowbox.cn best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

knowbox.cn SEO score

85

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

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Knowbox.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese is used on the page, and it does not match the claimed English language. Our system also found out that Knowbox.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

knowbox.cn

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