Tools & Wizards About Us
www-cloudfront-alias.coursera.org screenshot

Report Summary

  • 36

    Performance

    Renders faster than
    56% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

www-cloudfront-alias.coursera.org

Coursera | Online Courses & Credentials From Top Educators. Join for Free

Page Load Speed

1.6 sec in total

First Response

40 ms

Resources Loaded

785 ms

Page Rendered

809 ms

www-cloudfront-alias.coursera.org screenshot

About Website

Visit www-cloudfront-alias.coursera.org now to see the best up-to-date Www Cloudfront Alias Coursera content for India and also check out these interesting facts you probably never knew about www-cloudfront-alias.coursera.org

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Key Findings

We analyzed Www-cloudfront-alias.coursera.org page load time and found that the first response time was 40 ms and then it took 1.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

www-cloudfront-alias.coursera.org performance score

36

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value7,550 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.055

98/100

15%

TTI (Time to Interactive)

Value24.8 s

0/100

10%

Network Requests Diagram

www-cloudfront-alias.coursera.org

40 ms

www-cloudfront-alias.coursera.org

401 ms

allStyles.2293654321625cdcb0b1.css

63 ms

allStyles.2293654321625cdcb0b1.js

53 ms

en.app.1fae11e544b76c781e94.js

138 ms

Our browser made a total of 61 requests to load all elements on the main page. We found that 3% of them (2 requests) were addressed to the original Www-cloudfront-alias.coursera.org, 90% (55 requests) were made to D3njjcbhbojbot.cloudfront.net and 5% (3 requests) were made to Coursera_assets.s3.amazonaws.com. The less responsive or slowest element that took the longest time to load (401 ms) belongs to the original domain Www-cloudfront-alias.coursera.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 579.6 kB (36%)

Content Size

1.6 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Www-cloudfront-alias.coursera.org main page is 1.6 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. 40% of websites need less resources to load. HTML takes 690.8 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 575.6 kB

  • Original 690.8 kB
  • After minification 690.7 kB
  • After compression 115.2 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 575.6 kB or 83% of the original size.

Image Optimization

-0%

Potential reduce by 733 B

  • Original 199.3 kB
  • After minification 198.5 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. Www Cloudfront Alias Coursera images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 3.0 kB

  • Original 671.2 kB
  • After minification 671.1 kB
  • After compression 668.2 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 204 B

  • Original 29.1 kB
  • After minification 29.1 kB
  • After compression 28.9 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. Www-cloudfront-alias.coursera.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 20 (38%)

Requests Now

52

After Optimization

32

  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Www Cloudfront Alias 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

www-cloudfront-alias.coursera.org

www-cloudfront-alias.coursera.org

40 ms

www-cloudfront-alias.coursera.org

www-cloudfront-alias.coursera.org

401 ms

allStyles.2293654321625cdcb0b1.css

allStyles.2293654321625cdcb0b1.css

63 ms

allStyles.2293654321625cdcb0b1.js

allStyles.2293654321625cdcb0b1.js

53 ms

en.app.1fae11e544b76c781e94.js

en.app.1fae11e544b76c781e94.js

138 ms

fedc02525d7e04e6bbdb4260c2ac3f02.png

fedc02525d7e04e6bbdb4260c2ac3f02.png

190 ms

bundle.tracing.replay.min.js

bundle.tracing.replay.min.js

112 ms

DeepLearning.AI_720x500.png

DeepLearning.AI_720x500.png

77 ms

illinois-3.png

illinois-3.png

77 ms

duke-3.png

duke-3.png

60 ms

google.png

google.png

81 ms

umich.png

umich.png

80 ms

1000px-IBM_logo.svg.png

1000px-IBM_logo.svg.png

83 ms

imperial.png

imperial.png

88 ms

stanford.svg

stanford.svg

87 ms

penn.svg

penn.svg

91 ms

01fa5e6fc2322212ee39ca230d1ebe07.png

01fa5e6fc2322212ee39ca230d1ebe07.png

90 ms

91b019ffab1dc7a0d01c22f0d8477df6.png

91b019ffab1dc7a0d01c22f0d8477df6.png

102 ms

bb27e094f0d3c8a047b9463fedae89be.png

bb27e094f0d3c8a047b9463fedae89be.png

108 ms

adrienne_testimonial_image.jpg

adrienne_testimonial_image.jpg

105 ms

506bf6d50f5f97ab96bc75c41dfae8d8.png

506bf6d50f5f97ab96bc75c41dfae8d8.png

108 ms

data_science.png

data_science.png

107 ms

business.png

business.png

108 ms

computer_science.png

computer_science.png

129 ms

health.png

health.png

132 ms

social_sciences.png

social_sciences.png

128 ms

personal_development.png

personal_development.png

131 ms

arts_and_humanities.png

arts_and_humanities.png

126 ms

physical_science_and_engineering.png

physical_science_and_engineering.png

131 ms

language_learning.png

language_learning.png

152 ms

information_technology.png

information_technology.png

149 ms

math_and_logic.png

math_and_logic.png

151 ms

outcomes.png

outcomes.png

148 ms

loreal.svg

loreal.svg

149 ms

pandg.svg

pandg.svg

149 ms

tata.svg

tata.svg

153 ms

DANONE_LOGO.png

DANONE_LOGO.png

153 ms

Emirates_NBD_logo.png

Emirates_NBD_logo.png

156 ms

Reliance_logo-2.svg

Reliance_logo-2.svg

155 ms

logo-capgemini.svg

logo-capgemini.svg

156 ms

abb81edb31d0f1c0b0e5ab8b57115416.png

abb81edb31d0f1c0b0e5ab8b57115416.png

130 ms

2a9c3c90cb28837086797a5ac6ada3ed.png

2a9c3c90cb28837086797a5ac6ada3ed.png

157 ms

logo-petrobras.svg

logo-petrobras.svg

133 ms

General_Electric_logo.svg

General_Electric_logo.svg

107 ms

Image-Next-Step.png

Image-Next-Step.png

87 ms

download_on_the_app_store_badge_en.svg

download_on_the_app_store_badge_en.svg

89 ms

en_generic_rgb_wo_45.png

en_generic_rgb_wo_45.png

88 ms

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

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

86 ms

facebook.png

facebook.png

91 ms

linkedin.png

linkedin.png

87 ms

twitter.png

twitter.png

84 ms

youtube.png

youtube.png

80 ms

instagram.png

instagram.png

78 ms

9b7e964107839c77644d7e7d15035b73.png

9b7e964107839c77644d7e7d15035b73.png

79 ms

opensans-300.woff

opensans-300.woff

10 ms

opensans-regular.woff

opensans-regular.woff

52 ms

opensans-700.woff

opensans-700.woff

9 ms

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

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

6 ms

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

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

8 ms

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

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

7 ms

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

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

52 ms

Accessibility Review

www-cloudfront-alias.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

www-cloudfront-alias.coursera.org best practices score

75

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

SEO Factors

www-cloudfront-alias.coursera.org SEO score

85

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

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 Www-cloudfront-alias.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 Www-cloudfront-alias.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

www-cloudfront-alias.coursera.org

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