Tools & Wizards About Us
zh.coursera.org screenshot

Report Summary

  • 23

    Performance

    Renders faster than
    41% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

zh.coursera.org

Coursera | Degrees, Certificates, & Free Online Courses

Page Load Speed

3.3 sec in total

First Response

21 ms

Resources Loaded

1.5 sec

Page Rendered

1.8 sec

zh.coursera.org screenshot

About Website

Welcome to zh.coursera.org homepage info - get ready to check Zh Coursera best content for India right away, or after learning these important things about zh.coursera.org

Learn new job skills in online courses from industry leaders like Google, IBM, & Meta. Advance your career with top degrees from Michigan, Penn, Imperial & more.

Visit zh.coursera.org

Key Findings

We analyzed Zh.coursera.org page load time and found that the first response time was 21 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

zh.coursera.org performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value7.0 s

6/100

25%

SI (Speed Index)

Value9.9 s

10/100

10%

TBT (Total Blocking Time)

Value5,090 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.044

99/100

15%

TTI (Time to Interactive)

Value27.4 s

0/100

10%

Network Requests Diagram

zh.coursera.org

21 ms

www.coursera.org

952 ms

allStyles.036607de29fb40504a66.js

92 ms

en.app.acb32d04b94ed3c78a60.js

119 ms

5ee5bde1f4ca2124f7a7086331fa8307.png

67 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 Zh.coursera.org, 96% (80 requests) were made to D3njjcbhbojbot.cloudfront.net and 1% (1 request) were made to Coursera.org. The less responsive or slowest element that took the longest time to load (952 ms) relates to the external source Coursera.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (44%)

Content Size

2.4 MB

After Optimization

1.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zh.coursera.org main page is 2.4 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. 50% of websites need less resources to load. HTML takes 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 1.1 MB

  • Original 1.2 MB
  • After minification 1.2 MB
  • After compression 195.2 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 1.1 MB or 84% of the original size.

Image Optimization

-0%

Potential reduce by 678 B

  • Original 517.5 kB
  • After minification 516.8 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. Zh Coursera images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 2.7 kB

  • Original 619.8 kB
  • After minification 619.7 kB
  • After compression 617.1 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

-0%

Potential reduce by 144 B

  • Original 29.4 kB
  • After minification 29.4 kB
  • After compression 29.2 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. Zh.coursera.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 21 (28%)

Requests Now

74

After Optimization

53

  • Images
  • JavaScript
  • CSS

The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zh Coursera. 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

zh.coursera.org

zh.coursera.org

21 ms

www.coursera.org

www.coursera.org

952 ms

allStyles.036607de29fb40504a66.js

allStyles.036607de29fb40504a66.js

92 ms

en.app.acb32d04b94ed3c78a60.js

en.app.acb32d04b94ed3c78a60.js

119 ms

5ee5bde1f4ca2124f7a7086331fa8307.png

5ee5bde1f4ca2124f7a7086331fa8307.png

67 ms

8f0f9bd2b409eef47cb3b2c57bb222b0.png

8f0f9bd2b409eef47cb3b2c57bb222b0.png

100 ms

coursera-plus-blue.png

coursera-plus-blue.png

75 ms

illinois-3.png

illinois-3.png

70 ms

duke-3.png

duke-3.png

74 ms

google.png

google.png

73 ms

umich.png

umich.png

77 ms

1000px-IBM_logo.svg.png

1000px-IBM_logo.svg.png

100 ms

imperial.png

imperial.png

100 ms

stanford.svg

stanford.svg

102 ms

penn.svg

penn.svg

103 ms

adrienne_testimonial_image.jpg

adrienne_testimonial_image.jpg

106 ms

Project-management-professional-certificate-SP-Logo.png

Project-management-professional-certificate-SP-Logo.png

104 ms

MSFT-stacked-logo_FINAL.png

MSFT-stacked-logo_FINAL.png

103 ms

1060x596_GCC-photos_Ashley.png

1060x596_GCC-photos_Ashley.png

106 ms

Google-G_360x360.png

Google-G_360x360.png

107 ms

1060x596_GCC-photos_Karrim.png

1060x596_GCC-photos_Karrim.png

108 ms

1060x596_GCC-photos_Ashley.png

1060x596_GCC-photos_Ashley.png

111 ms

Search-Thumbnail.jpg

Search-Thumbnail.jpg

109 ms

iStock-1169539468.jpg

iStock-1169539468.jpg

110 ms

6bb3e56bee1039824ca0e77ca81fbaa7.png

6bb3e56bee1039824ca0e77ca81fbaa7.png

113 ms

GenAI_Logo-Image_1200x1200pxl-copy.jpg

GenAI_Logo-Image_1200x1200pxl-copy.jpg

110 ms

SqThumbs-AI4G-_Globe_Blue_1200x1200_v2.png

SqThumbs-AI4G-_Globe_Blue_1200x1200_v2.png

112 ms

Navigating-GenAI.png

Navigating-GenAI.png

116 ms

image6.png

image6.png

117 ms

gc-logo-1000x1000.png

gc-logo-1000x1000.png

115 ms

Project-management-professional-certificate-SP-Logo.png

Project-management-professional-certificate-SP-Logo.png

118 ms

gc-logo-1000x1000.png

gc-logo-1000x1000.png

117 ms

unnamed.png

unnamed.png

118 ms

Career-Development.jpg

Career-Development.jpg

119 ms

Logo_Financial-Markets.png

Logo_Financial-Markets.png

122 ms

excel-g9ac6b342d_1920.png

excel-g9ac6b342d_1920.png

123 ms

iMBA+square.jpg

iMBA+square.jpg

123 ms

thumbnail.jpeg

thumbnail.jpeg

124 ms

bundle.tracing.replay.min.js

bundle.tracing.replay.min.js

42 ms

opensans-regular.woff

opensans-regular.woff

77 ms

opensans-700.woff

opensans-700.woff

61 ms

header.jpg

header.jpg

58 ms

7f1ba63f-ce16-4c29-9690-557ac3eb3168.jpg

7f1ba63f-ce16-4c29-9690-557ac3eb3168.jpg

56 ms

thumbnail.jpg

thumbnail.jpg

57 ms

40ad070e-4c5d-4f7b-93b1-16792b711e78.jpg

40ad070e-4c5d-4f7b-93b1-16792b711e78.jpg

56 ms

1203ebfb-99c9-4919-b943-18add117e361.jpg

1203ebfb-99c9-4919-b943-18add117e361.jpg

51 ms

data_science.png

data_science.png

35 ms

business.png

business.png

59 ms

computer_science.png

computer_science.png

59 ms

health.png

health.png

59 ms

social_sciences.png

social_sciences.png

60 ms

personal_development.png

personal_development.png

59 ms

arts_and_humanities.png

arts_and_humanities.png

60 ms

physical_science_and_engineering.png

physical_science_and_engineering.png

59 ms

language_learning.png

language_learning.png

59 ms

information_technology.png

information_technology.png

60 ms

math_and_logic.png

math_and_logic.png

61 ms

outcomes.png

outcomes.png

60 ms

loreal.svg

loreal.svg

60 ms

pandg.svg

pandg.svg

61 ms

tata.svg

tata.svg

61 ms

DANONE_LOGO.png

DANONE_LOGO.png

61 ms

Emirates_NBD_logo.png

Emirates_NBD_logo.png

61 ms

Reliance_logo-2.svg

Reliance_logo-2.svg

60 ms

logo-capgemini.svg

logo-capgemini.svg

60 ms

logo-petrobras.svg

logo-petrobras.svg

60 ms

General_Electric_logo.svg

General_Electric_logo.svg

61 ms

Image-Next-Step.png

Image-Next-Step.png

64 ms

download_on_the_app_store_badge_en.svg

download_on_the_app_store_badge_en.svg

61 ms

en_generic_rgb_wo_45.png

en_generic_rgb_wo_45.png

61 ms

2018-B-Corp-Logo-Black-S.png

2018-B-Corp-Logo-Black-S.png

60 ms

facebook.png

facebook.png

61 ms

linkedin.png

linkedin.png

60 ms

twitter.png

twitter.png

61 ms

youtube.png

youtube.png

61 ms

instagram.png

instagram.png

61 ms

9b7e964107839c77644d7e7d15035b73.png

9b7e964107839c77644d7e7d15035b73.png

61 ms

allStyles.036607de29fb40504a66.css

allStyles.036607de29fb40504a66.css

4 ms

source-sans-pro-v14-latin-700.woff

source-sans-pro-v14-latin-700.woff

25 ms

source-sans-pro-v14-latin-600.woff

source-sans-pro-v14-latin-600.woff

26 ms

source-sans-pro-v14-latin-regular.woff

source-sans-pro-v14-latin-regular.woff

25 ms

source-sans-pro-v14-latin-300.woff

source-sans-pro-v14-latin-300.woff

25 ms

opensans-300.woff

opensans-300.woff

12 ms

Accessibility Review

zh.coursera.org accessibility score

98

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.

Best Practices

zh.coursera.org best practices score

67

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

zh.coursera.org SEO score

92

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

High

Tap targets are not sized appropriately

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 Zh.coursera.org 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 Zh.coursera.org 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

zh.coursera.org

Open Graph data is detected on the main page of Zh Coursera. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: