Tools & Wizards About Us
coursera.zoom.us screenshot

Report Summary

  • 86

    Performance

    Renders faster than
    89% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

coursera.zoom.us

Coursera Video Conferencing, Web Conferencing, Online Meetings, Screen Sharing - Zoom

Page Load Speed

2.6 sec in total

First Response

30 ms

Resources Loaded

2.3 sec

Page Rendered

290 ms

coursera.zoom.us screenshot

About Website

Visit coursera.zoom.us now to see the best up-to-date Coursera Zoom content for United States and also check out these interesting facts you probably never knew about coursera.zoom.us

Zoom unifies cloud video conferencing, simple online meetings, and cross platform group chat into one easy-to-use platform. Our solution offers the best video, audio, and screen-sharing experience acr...

Visit coursera.zoom.us

Key Findings

We analyzed Coursera.zoom.us page load time and found that the first response time was 30 ms and then it took 2.6 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

coursera.zoom.us performance score

86

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

81/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

54/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.031

100/100

15%

TTI (Time to Interactive)

Value3.5 s

92/100

10%

Network Requests Diagram

coursera.zoom.us

30 ms

coursera.zoom.us

64 ms

all.min.css

308 ms

landing.min.css

439 ms

conversion_async.js

33 ms

Our browser made a total of 74 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Coursera.zoom.us, 96% (71 requests) were made to St1.zoom.us and 1% (1 request) were made to Googleadservices.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source St1.zoom.us.

Page Optimization Overview & Recommendations

Page size can be reduced by 92.9 kB (10%)

Content Size

890.7 kB

After Optimization

797.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Coursera.zoom.us main page is 890.7 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. 35% of websites need less resources to load. Images take 722.1 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 25.3 kB

  • Original 32.8 kB
  • After minification 29.5 kB
  • After compression 7.5 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 25.3 kB or 77% of the original size.

Image Optimization

-9%

Potential reduce by 66.5 kB

  • Original 722.1 kB
  • After minification 655.6 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. Coursera Zoom images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 861 B

  • Original 99.3 kB
  • After minification 99.2 kB
  • After compression 98.4 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

-1%

Potential reduce by 195 B

  • Original 36.5 kB
  • After minification 36.5 kB
  • After compression 36.3 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. Coursera.zoom.us has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 4 (6%)

Requests Now

62

After Optimization

58

  • Images
  • JavaScript
  • CSS

The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coursera Zoom. 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 as a result speed up the page load time.

Network Requests Diagram

coursera.zoom.us

coursera.zoom.us

30 ms

coursera.zoom.us

coursera.zoom.us

64 ms

all.min.css

all.min.css

308 ms

landing.min.css

landing.min.css

439 ms

conversion_async.js

conversion_async.js

33 ms

all.min.js

all.min.js

561 ms

jquery.cycle2.min.js

jquery.cycle2.min.js

533 ms

jquery.cycle2.center.min.js

jquery.cycle2.center.min.js

344 ms

home.min.js

home.min.js

530 ms

ZoomLogo.png

ZoomLogo.png

344 ms

solution_collaboration_center.png

solution_collaboration_center.png

531 ms

solution_video_webinar.png

solution_video_webinar.png

532 ms

solution_zoom_rooms.png

solution_zoom_rooms.png

601 ms

solution_business_im.png

solution_business_im.png

627 ms

solution_h323.png

solution_h323.png

621 ms

solution_zoom_ford_evelopers.png

solution_zoom_ford_evelopers.png

632 ms

logo_gartner.png

logo_gartner.png

726 ms

logo_sequoia2.png

logo_sequoia2.png

711 ms

logo_okta.png

logo_okta.png

717 ms

icon_1.png

icon_1.png

731 ms

icon_2.png

icon_2.png

767 ms

icon_3.png

icon_3.png

823 ms

icon_4.png

icon_4.png

896 ms

icon_5.png

icon_5.png

889 ms

leo_gomez.png

leo_gomez.png

879 ms

logo_solarcity.png

logo_solarcity.png

876 ms

peter_gassner.png

peter_gassner.png

872 ms

logo_veeva.png

logo_veeva.png

984 ms

rachel_dunagan.png

rachel_dunagan.png

1014 ms

logo_phoenix.png

logo_phoenix.png

1017 ms

john_bansavich.png

john_bansavich.png

1029 ms

logo_university.png

logo_university.png

1020 ms

1LogoUber.jpg

1LogoUber.jpg

1060 ms

2LogoSlack.jpg

2LogoSlack.jpg

1130 ms

3LogoGoDaddy.jpg

3LogoGoDaddy.jpg

1160 ms

10Logo.png

10Logo.png

1214 ms

22Logo.png

22Logo.png

1145 ms

7LogoOneMedical.jpg

7LogoOneMedical.jpg

1163 ms

8LogoTrendMicro.jpg

8LogoTrendMicro.jpg

1219 ms

9Logo.jpg

9Logo.jpg

978 ms

4LogoRingCentral.jpg

4LogoRingCentral.jpg

947 ms

11LogoSonos.png

11LogoSonos.png

979 ms

12Logo.png

12Logo.png

810 ms

13Logo.png

13Logo.png

815 ms

14Logo.png

14Logo.png

795 ms

15Logo.png

15Logo.png

947 ms

DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff

DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff

883 ms

cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff

cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff

941 ms

MTP_ySUJH_bn48VBG8sNSnhCUOGz7vYGh680lGh-uXM.woff

MTP_ySUJH_bn48VBG8sNSnhCUOGz7vYGh680lGh-uXM.woff

883 ms

k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff

k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff

923 ms

PRmiXeptR36kaC0GEAetxh_xHqYgAV9Bl_ZQbYUxnQU.woff

PRmiXeptR36kaC0GEAetxh_xHqYgAV9Bl_ZQbYUxnQU.woff

890 ms

xjAJXh38I15wypJXxuGMBobN6UDyHWBl620a-IRfuBk.woff

xjAJXh38I15wypJXxuGMBobN6UDyHWBl620a-IRfuBk.woff

952 ms

PRmiXeptR36kaC0GEAetxn5HxGBcBvicCpTp6spHfNo.woff

PRmiXeptR36kaC0GEAetxn5HxGBcBvicCpTp6spHfNo.woff

881 ms

PRmiXeptR36kaC0GEAetxjqR_3kx9_hJXbbyU8S6IN0.woff

PRmiXeptR36kaC0GEAetxjqR_3kx9_hJXbbyU8S6IN0.woff

940 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

904 ms

16Logo.png

16Logo.png

944 ms

17LogoSanta-Clara-University.png

17LogoSanta-Clara-University.png

907 ms

23LogoBox.png

23LogoBox.png

954 ms

19LogoProofpoint.png

19LogoProofpoint.png

843 ms

20Logo.png

20Logo.png

912 ms

21LogoTicketmaster.png

21LogoTicketmaster.png

947 ms

home_banner.jpg

home_banner.jpg

1085 ms

arrows_sprite.png

arrows_sprite.png

920 ms

Zendesk.jpg

Zendesk.jpg

1012 ms

play_dongle.png

play_dongle.png

971 ms

bg_peter.jpg

bg_peter.jpg

1040 ms

bg_rachel.jpg

bg_rachel.jpg

1017 ms

bg_john.jpg

bg_john.jpg

984 ms

IconBlog.png

IconBlog.png

930 ms

IconLinkedIn.png

IconLinkedIn.png

1003 ms

IconTwitter.png

IconTwitter.png

860 ms

IconYoutube.png

IconYoutube.png

1061 ms

IconFacebook.png

IconFacebook.png

857 ms

glyphicons-halflings-regular.ttf

glyphicons-halflings-regular.ttf

526 ms

Accessibility Review

coursera.zoom.us accessibility score

95

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 input fields do not have accessible names

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

Best Practices

coursera.zoom.us 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

coursera.zoom.us SEO score

62

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

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Coursera.zoom.us can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Coursera.zoom.us 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

coursera.zoom.us

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