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about.coursera.org screenshot

Report Summary

  • 34

    Performance

    Renders faster than
    54% of other websites

  • 99

    Accessibility

    Visual factors better than
    that of 96% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

about.coursera.org

Coursera’s Mission, Vision, and Commitment to Our Community | Coursera

Page Load Speed

316 ms in total

First Response

81 ms

Resources Loaded

235 ms

Page Rendered

0 ms

about.coursera.org screenshot

About Website

Click here to check amazing About Coursera content for India. Otherwise, check out these important facts you probably never knew about about.coursera.org

Coursera provides access to world-class learning by partnering with 300+ world-class universities and companies. We envision a world where anyone, anywhere has the power to transform their lives throu...

Visit about.coursera.org

Key Findings

We analyzed About.coursera.org page load time and found that the first response time was 81 ms and then it took 235 ms to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

about.coursera.org performance score

34

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value5.1 s

25/100

25%

SI (Speed Index)

Value5.1 s

61/100

10%

TBT (Total Blocking Time)

Value1,090 ms

24/100

30%

CLS (Cumulative Layout Shift)

Value0.176

68/100

15%

TTI (Time to Interactive)

Value13.6 s

11/100

10%

Network Requests Diagram

about.coursera.org

81 ms

gtm.js

68 ms

coursera-wordmark-blue.svg

25 ms

anthem_mobile_bg.jpg

29 ms

partner-logos.png

29 ms

Our browser made a total of 21 requests to load all elements on the main page. We found that 48% of them (10 requests) were addressed to the original About.coursera.org, 43% (9 requests) were made to Images.ctfassets.net and 5% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (84 ms) belongs to the original domain About.coursera.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 363.0 kB (30%)

Content Size

1.2 MB

After Optimization

849.3 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of About.coursera.org main page is 1.2 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. 25% of websites need less resources to load. Images take 561.7 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 131.7 kB

  • Original 185.4 kB
  • After minification 185.3 kB
  • After compression 53.6 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. 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 131.7 kB or 71% of the original size.

Image Optimization

-2%

Potential reduce by 10.7 kB

  • Original 561.7 kB
  • After minification 551.0 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. About Coursera images are well optimized though.

JavaScript Optimization

-47%

Potential reduce by 220.5 kB

  • Original 465.2 kB
  • After minification 465.1 kB
  • After compression 244.7 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 220.5 kB or 47% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (45%)

Requests Now

20

After Optimization

11

  • Images
  • JavaScript

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of About Coursera. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

about.coursera.org

about.coursera.org

81 ms

gtm.js

gtm.js

68 ms

coursera-wordmark-blue.svg

coursera-wordmark-blue.svg

25 ms

anthem_mobile_bg.jpg

anthem_mobile_bg.jpg

29 ms

partner-logos.png

partner-logos.png

29 ms

government-agencies-c.png

government-agencies-c.png

14 ms

million-learners-c.png

million-learners-c.png

14 ms

world-class-partners-c.png

world-class-partners-c.png

13 ms

campuses-career-skills-c.png

campuses-career-skills-c.png

11 ms

companies-skills-c-crunch.png

companies-skills-c-crunch.png

16 ms

BC-3032_About_Page_Image_Update.jpg

BC-3032_About_Page_Image_Update.jpg

20 ms

polyfill-c26e638d33bc1f1d37dc.js

polyfill-c26e638d33bc1f1d37dc.js

84 ms

webpack-runtime-21613b313276a74de2c0.js

webpack-runtime-21613b313276a74de2c0.js

29 ms

framework-2d6b7d2e2be378715b78.js

framework-2d6b7d2e2be378715b78.js

38 ms

app-556f169427988b2c19c7.js

app-556f169427988b2c19c7.js

38 ms

styles-407fe62976dc5310c43e.js

styles-407fe62976dc5310c43e.js

24 ms

cb1608f2-08eef0976543f9841362.js

cb1608f2-08eef0976543f9841362.js

28 ms

commons-ee818aed72620f2e69e7.js

commons-ee818aed72620f2e69e7.js

63 ms

component---src-pages-index-js-4cc2708e24d7ab836406.js

component---src-pages-index-js-4cc2708e24d7ab836406.js

62 ms

400.js

400.js

48 ms

app_store-a6b57454d3bc3c2ee7c90dee966c85ba.svg

app_store-a6b57454d3bc3c2ee7c90dee966c85ba.svg

47 ms

Accessibility Review

about.coursera.org accessibility score

99

Accessibility Issues

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

about.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

about.coursera.org 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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise About.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 About.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

about.coursera.org

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