Tools & Wizards About Us
21classes.com screenshot

Report Summary

  • 0

    Performance

  • 75

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

21classes.com

Page Load Speed

3.2 sec in total

First Response

327 ms

Resources Loaded

2.5 sec

Page Rendered

396 ms

21classes.com screenshot

About Website

Click here to check amazing 21 Classes content for Malaysia. Otherwise, check out these important facts you probably never knew about 21classes.com

Create a virtual classroom with blogs. 21Classes provides powerful and secure services to get your students safely blogging.

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Key Findings

We analyzed 21classes.com page load time and found that the first response time was 327 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

21classes.com performance score

0

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.3 s

7/100

10%

LCP (Largest Contentful Paint)

Value0

0/100

25%

SI (Speed Index)

Value10.1 s

9/100

10%

TBT (Total Blocking Time)

Value770 ms

38/100

30%

CLS (Cumulative Layout Shift)

Value0.01

100/100

15%

TTI (Time to Interactive)

Value19.9 s

2/100

10%

Network Requests Diagram

21classes.com

327 ms

21classes.com

408 ms

www.21classes.com

520 ms

modules.css

106 ms

29yo0o1jwp3u.css

242 ms

Our browser made a total of 38 requests to load all elements on the main page. We found that 92% of them (35 requests) were addressed to the original 21classes.com, 5% (2 requests) were made to Ssl.google-analytics.com and 3% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (863 ms) belongs to the original domain 21classes.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 117.4 kB (26%)

Content Size

445.8 kB

After Optimization

328.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 21classes.com main page is 445.8 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. Images take 378.3 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 6.9 kB

  • Original 9.5 kB
  • After minification 7.4 kB
  • After compression 2.6 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 2.1 kB, which is 22% 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 6.9 kB or 73% of the original size.

Image Optimization

-20%

Potential reduce by 77.4 kB

  • Original 378.3 kB
  • After minification 300.9 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. Obviously, 21 Classes needs image optimization as it can save up to 77.4 kB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-5%

Potential reduce by 845 B

  • Original 18.4 kB
  • After minification 18.1 kB
  • After compression 17.5 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. This website has mostly compressed JavaScripts.

CSS Optimization

-81%

Potential reduce by 32.2 kB

  • Original 39.7 kB
  • After minification 33.1 kB
  • After compression 7.5 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. 21classes.com needs all CSS files to be minified and compressed as it can save up to 32.2 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (38%)

Requests Now

34

After Optimization

21

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 21 Classes. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

21classes.com

21classes.com

327 ms

21classes.com

21classes.com

408 ms

www.21classes.com

www.21classes.com

520 ms

modules.css

modules.css

106 ms

29yo0o1jwp3u.css

29yo0o1jwp3u.css

242 ms

jquery.min.js

jquery.min.js

83 ms

21classes.js

21classes.js

294 ms

ga.js

ga.js

91 ms

logo.png

logo.png

118 ms

bg_btn1.png

bg_btn1.png

113 ms

str_login.png

str_login.png

116 ms

bullet1_MediumSlateBlue.png

bullet1_MediumSlateBlue.png

210 ms

str_group_nav.png

str_group_nav.png

211 ms

bg1_DarkGray.png

bg1_DarkGray.png

213 ms

pic_tagcloud.png

pic_tagcloud.png

766 ms

tagline_create-a-virtual-classroom-easy-hosted-secure.png

tagline_create-a-virtual-classroom-easy-hosted-secure.png

384 ms

box1-PaleGreen-top.png

box1-PaleGreen-top.png

296 ms

box1-PaleGreen-bg.png

box1-PaleGreen-bg.png

302 ms

icon1_teacher.png

icon1_teacher.png

307 ms

heading_teacher-single-solution.png

heading_teacher-single-solution.png

306 ms

bullet1_MediumVioletRed.png

bullet1_MediumVioletRed.png

390 ms

bg_btn2.png

bg_btn2.png

394 ms

str_read-more.png

str_read-more.png

408 ms

box1-PaleGreen-bottom.png

box1-PaleGreen-bottom.png

406 ms

box1-MediumVioletRed-top.png

box1-MediumVioletRed-top.png

475 ms

box1-MediumVioletRed-bg.png

box1-MediumVioletRed-bg.png

486 ms

icon1_classroom.png

icon1_classroom.png

493 ms

heading_classroom-solution.png

heading_classroom-solution.png

512 ms

box1-MediumVioletRed-bottom.png

box1-MediumVioletRed-bottom.png

503 ms

box1-MediumSlateBlue-top.png

box1-MediumSlateBlue-top.png

569 ms

box1-MediumSlateBlue-bg.png

box1-MediumSlateBlue-bg.png

582 ms

icon1_school.png

icon1_school.png

586 ms

heading_school-wide-solution.png

heading_school-wide-solution.png

598 ms

box1-MediumSlateBlue-bottom.png

box1-MediumSlateBlue-bottom.png

610 ms

bullet2_tick-PaleGreen.png

bullet2_tick-PaleGreen.png

660 ms

pattern1-DarkGray-vertical.png

pattern1-DarkGray-vertical.png

676 ms

eraserregular-webfont.woff

eraserregular-webfont.woff

863 ms

__utm.gif

__utm.gif

12 ms

Accessibility Review

21classes.com accessibility score

75

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

<frame> or <iframe> elements do not have a title

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

21classes.com 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

Browser errors were logged to the console

SEO Factors

21classes.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

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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 21classes.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is English. Our system also found out that 21classes.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

21classes.com

Open Graph description is not detected on the main page of 21 Classes. 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: