Tools & Wizards About Us
class.com screenshot

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 47% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

class.com

Class: The Next Generation Virtual Classroom | Class

Page Load Speed

9.4 sec in total

First Response

3.6 sec

Resources Loaded

5.6 sec

Page Rendered

210 ms

class.com screenshot

About Website

Click here to check amazing Class content for United States. Otherwise, check out these important facts you probably never knew about class.com

Class, the next generation virtual classroom. Trusted by 10M users from 1500 institutions in education and training. Make your virtual classroom feel like a real classroom.

Visit class.com

Key Findings

We analyzed Class.com page load time and found that the first response time was 3.6 sec and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

class.com performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

13/100

10%

LCP (Largest Contentful Paint)

Value15.2 s

0/100

25%

SI (Speed Index)

Value13.4 s

2/100

10%

TBT (Total Blocking Time)

Value5,620 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.099

90/100

15%

TTI (Time to Interactive)

Value28.0 s

0/100

10%

Network Requests Diagram

class.com

3586 ms

details.php4

929 ms

jquery-ui.css

50 ms

gtld.buyers.css

58 ms

forms.css

55 ms

Our browser made a total of 83 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Class.com, 76% (63 requests) were made to Cdn.sedo.com and 12% (10 requests) were made to Sedo.com. The less responsive or slowest element that took the longest time to load (3.6 sec) belongs to the original domain Class.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.3 MB (66%)

Content Size

2.0 MB

After Optimization

697.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Class.com main page is 2.0 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. 65% of websites need less resources to load. Javascripts take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 210.8 kB

  • Original 238.2 kB
  • After minification 235.5 kB
  • After compression 27.4 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 210.8 kB or 88% of the original size.

Image Optimization

-9%

Potential reduce by 26.4 kB

  • Original 303.4 kB
  • After minification 277.0 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. Class images are well optimized though.

JavaScript Optimization

-69%

Potential reduce by 714.8 kB

  • Original 1.0 MB
  • After minification 841.2 kB
  • After compression 315.8 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 714.8 kB or 69% of the original size.

CSS Optimization

-83%

Potential reduce by 386.4 kB

  • Original 463.4 kB
  • After minification 369.9 kB
  • After compression 77.0 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. Class.com needs all CSS files to be minified and compressed as it can save up to 386.4 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 56 (69%)

Requests Now

81

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 81 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Class. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 30 to 1 for JavaScripts and from 28 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

class.com

class.com

3586 ms

details.php4

details.php4

929 ms

jquery-ui.css

jquery-ui.css

50 ms

gtld.buyers.css

gtld.buyers.css

58 ms

forms.css

forms.css

55 ms

iehacks.css

iehacks.css

63 ms

basic.css

basic.css

66 ms

clickelements.css

clickelements.css

73 ms

slide.css

slide.css

76 ms

basemod_common.css

basemod_common.css

72 ms

basemod_layout0102.css

basemod_layout0102.css

76 ms

content_correction.css

content_correction.css

87 ms

content_common.css

content_common.css

81 ms

web_new.css

web_new.css

77 ms

contentstyle6.css

contentstyle6.css

76 ms

navigation.css

navigation.css

87 ms

print_common.css

print_common.css

82 ms

magicsuggest.css

magicsuggest.css

82 ms

tld-dialog.css

tld-dialog.css

84 ms

base_additional.css

base_additional.css

83 ms

tx_news_additional.css

tx_news_additional.css

84 ms

googlefonts.css

googlefonts.css

86 ms

font-awesome-4.css

font-awesome-4.css

90 ms

sedo.offerpage.css

sedo.offerpage.css

87 ms

sedo.plusbox.css

sedo.plusbox.css

87 ms

sedoDialogTip.css

sedoDialogTip.css

87 ms

selectric.css

selectric.css

88 ms

jquery.js

jquery.js

94 ms

jquery-ui.js

jquery-ui.js

105 ms

gtld.buyers.js

gtld.buyers.js

88 ms

modernizr.js

modernizr.js

127 ms

etracker.js

etracker.js

137 ms

langselect.js

langselect.js

102 ms

selectbox.js

selectbox.js

103 ms

core.js

core.js

124 ms

magicsuggest.js

magicsuggest.js

124 ms

tld-dialog.js

tld-dialog.js

124 ms

jquery.dialogTip.js

jquery.dialogTip.js

125 ms

font-awesome.min.css

font-awesome.min.css

63 ms

e.js

e.js

548 ms

swfobject.js

swfobject.js

172 ms

override.css

override.css

93 ms

buttons.css

buttons.css

91 ms

forms.js

forms.js

90 ms

jquery.thickbox.js

jquery.thickbox.js

78 ms

jquery.getUrlParam.js

jquery.getUrlParam.js

76 ms

jquery.timers-1.2.js

jquery.timers-1.2.js

75 ms

jquery.dialogBox.js

jquery.dialogBox.js

72 ms

nNav.js

nNav.js

72 ms

slide.js

slide.js

75 ms

functions.js

functions.js

71 ms

navigation.js

navigation.js

69 ms

offerpage.js

offerpage.js

68 ms

selectric.js

selectric.js

68 ms

bg_pagetop.gif

bg_pagetop.gif

31 ms

gpt.js

gpt.js

31 ms

ga.js

ga.js

45 ms

pubads_impl_82.js

pubads_impl_82.js

51 ms

__utm.gif

__utm.gif

45 ms

container.html

container.html

19 ms

jquery.js

jquery.js

276 ms

412 ms

t.js

t.js

662 ms

logo-sedo.png

logo-sedo.png

12 ms

sprites.main.png

sprites.main.png

26 ms

Sedo-Logo.png

Sedo-Logo.png

12 ms

sprites.buttons.png

sprites.buttons.png

12 ms

bg_contentbase.png

bg_contentbase.png

10 ms

BuyDomains_BrowseCategories_V2.jpg

BuyDomains_BrowseCategories_V2.jpg

103 ms

details.js

details.js

175 ms

sedo.sprites.offerpage.png

sedo.sprites.offerpage.png

22 ms

sedo.sprites.png

sedo.sprites.png

22 ms

sedo.sprites.search.png

sedo.sprites.search.png

13 ms

secure-seals.png

secure-seals.png

11 ms

payment-options.png

payment-options.png

13 ms

sprites.partner.logos.png

sprites.partner.logos.png

40 ms

common.php

common.php

281 ms

common.php

common.php

340 ms

service.php

service.php

330 ms

yes.gif

yes.gif

3 ms

exclamation-mark.png

exclamation-mark.png

4 ms

domaining-com.gif

domaining-com.gif

381 ms

loader.gif

loader.gif

381 ms

Accessibility Review

class.com accessibility score

79

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

class.com best practices score

83

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

class.com SEO score

93

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

Links do not have descriptive text

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

    EN

  • Language Claimed

    E

  • Encoding

    UTF-8

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

class.com

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