2.5 sec in total
21 ms
1.5 sec
999 ms
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Visit ww.coursera.orgWe analyzed Ww.coursera.org page load time and found that the first response time was 21 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.
ww.coursera.org performance score
name
value
score
weighting
Value5.0 s
9/100
10%
Value5.0 s
26/100
25%
Value30.9 s
0/100
10%
Value64,650 ms
0/100
30%
Value0.068
96/100
15%
Value81.0 s
0/100
10%
21 ms
211 ms
66 ms
437 ms
718 ms
Our browser made a total of 113 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Ww.coursera.org, 87% (98 requests) were made to D3njjcbhbojbot.cloudfront.net and 8% (9 requests) were made to Images.ctfassets.net. The less responsive or slowest element that took the longest time to load (718 ms) relates to the external source D3njjcbhbojbot.cloudfront.net.
Page size can be reduced by 713.8 kB (72%)
995.2 kB
281.4 kB
In fact, the total size of Ww.coursera.org main page is 995.2 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. 70% of websites need less resources to load. HTML takes 831.0 kB which makes up the majority of the site volume.
Potential reduce by 712.6 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 712.6 kB or 86% of the original size.
Potential reduce by 458 B
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. Ww Coursera images are well optimized though.
Potential reduce by 70 B
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 70 B or 53% of the original size.
Potential reduce by 689 B
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. Ww.coursera.org has all CSS files already compressed.
Number of requests can be reduced by 41 (39%)
104
63
The browser has sent 104 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ww 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.
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ww.coursera.org accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
ww.coursera.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
ww.coursera.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ww.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 Ww.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.
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ww.coursera.org
Open Graph data is detected on the main page of Ww Coursera. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: