Tools & Wizards About Us
khanacademy.fr screenshot

Report Summary

  • 45

    Performance

    Renders faster than
    64% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

khanacademy.fr

KhanAcademy.fr : Les KHAN célèbres du monde entier

Page Load Speed

2.2 sec in total

First Response

252 ms

Resources Loaded

1.8 sec

Page Rendered

135 ms

khanacademy.fr screenshot

About Website

Click here to check amazing KHAN Academy content. Otherwise, check out these important facts you probably never knew about khanacademy.fr

KhanAcademy.fr recense toutes les personnalités célèes (cinéma, éducation, musique...) qui s'appellent KHAN.

Visit khanacademy.fr

Key Findings

We analyzed Khanacademy.fr page load time and found that the first response time was 252 ms and then it took 2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

khanacademy.fr performance score

45

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

12/100

10%

LCP (Largest Contentful Paint)

Value5.6 s

17/100

25%

SI (Speed Index)

Value4.8 s

66/100

10%

TBT (Total Blocking Time)

Value520 ms

56/100

30%

CLS (Cumulative Layout Shift)

Value0.131

81/100

15%

TTI (Time to Interactive)

Value8.5 s

37/100

10%

Network Requests Diagram

khanacademy.fr

252 ms

style.css

124 ms

bootstrap.css

576 ms

bootstrap.min.css

530 ms

bootstrap-responsive.css

347 ms

Our browser made a total of 54 requests to load all elements on the main page. We found that 87% of them (47 requests) were addressed to the original Khanacademy.fr, 7% (4 requests) were made to Googleads.g.doubleclick.net and 4% (2 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (759 ms) belongs to the original domain Khanacademy.fr.

Page Optimization Overview & Recommendations

Page size can be reduced by 788.4 kB (51%)

Content Size

1.6 MB

After Optimization

765.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Khanacademy.fr 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. 30% of websites need less resources to load. Javascripts take 776.1 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 14.0 kB

  • Original 18.2 kB
  • After minification 17.9 kB
  • After compression 4.2 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 14.0 kB or 77% of the original size.

Image Optimization

-7%

Potential reduce by 33.4 kB

  • Original 450.9 kB
  • After minification 417.5 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. KHAN Academy images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 477.8 kB

  • Original 776.1 kB
  • After minification 746.5 kB
  • After compression 298.3 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 477.8 kB or 62% of the original size.

CSS Optimization

-85%

Potential reduce by 263.3 kB

  • Original 308.9 kB
  • After minification 269.0 kB
  • After compression 45.6 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. Khanacademy.fr needs all CSS files to be minified and compressed as it can save up to 263.3 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (21%)

Requests Now

52

After Optimization

41

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KHAN Academy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

khanacademy.fr

khanacademy.fr

252 ms

style.css

style.css

124 ms

bootstrap.css

bootstrap.css

576 ms

bootstrap.min.css

bootstrap.min.css

530 ms

bootstrap-responsive.css

bootstrap-responsive.css

347 ms

bootstrap-responsive.min.css

bootstrap-responsive.min.css

327 ms

bootstrap.js

bootstrap.js

462 ms

bootstrap.min.js

bootstrap.min.js

299 ms

slider.css

slider.css

455 ms

modernizr.custom.28468.js

modernizr.custom.28468.js

451 ms

jquery.min.js

jquery.min.js

9 ms

jquery.cslider.js

jquery.cslider.js

465 ms

adsbygoogle.js

adsbygoogle.js

113 ms

logo.png

logo.png

128 ms

navi_devider.png

navi_devider.png

120 ms

days.png

days.png

123 ms

month.png

month.png

126 ms

year.png

year.png

120 ms

calender_2heart.png

calender_2heart.png

125 ms

amir-khan.jpg

amir-khan.jpg

239 ms

genghis-khan.jpg

genghis-khan.jpg

251 ms

amir-khan-boxeur.jpg

amir-khan-boxeur.jpg

251 ms

sharukh-khan.jpg

sharukh-khan.jpg

260 ms

salman-khan.jpg

salman-khan.jpg

410 ms

jemima-khan.jpg

jemima-khan.jpg

294 ms

fateh-ali-khan.jpg

fateh-ali-khan.jpg

354 ms

khan-noonien-singh.jpg

khan-noonien-singh.jpg

440 ms

chaka-khan.jpg

chaka-khan.jpg

410 ms

aga-khan.jpg

aga-khan.jpg

410 ms

imran-khan.jpg

imran-khan.jpg

438 ms

salman-khan-academy.jpg

salman-khan-academy.jpg

473 ms

nusrat-fateh-ali-khan.jpg

nusrat-fateh-ali-khan.jpg

472 ms

kareena-kapoor-khan.jpg

kareena-kapoor-khan.jpg

517 ms

reema-khan.jpg

reema-khan.jpg

500 ms

mahira-khan.jpg

mahira-khan.jpg

588 ms

kareena-kapoor-khan2.jpg

kareena-kapoor-khan2.jpg

575 ms

salman-khan-academy-fr.jpg

salman-khan-academy-fr.jpg

626 ms

show_ads_impl.js

show_ads_impl.js

305 ms

serch.png

serch.png

527 ms

Pic_fram_small.png

Pic_fram_small.png

551 ms

pic_fram_larg.png

pic_fram_larg.png

573 ms

green.png

green.png

624 ms

blue.png

blue.png

677 ms

purple.png

purple.png

690 ms

content_pic_fRAM.png

content_pic_fRAM.png

637 ms

sagittarius_gray.png

sagittarius_gray.png

653 ms

scorpio.png

scorpio.png

722 ms

aquirs.png

aquirs.png

710 ms

pices.png

pices.png

744 ms

libra.png

libra.png

759 ms

zrt_lookup.html

zrt_lookup.html

35 ms

ads

ads

44 ms

ads

ads

333 ms

ads

ads

478 ms

Accessibility Review

khanacademy.fr accessibility score

71

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

khanacademy.fr best practices score

58

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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

khanacademy.fr 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

Image elements do not have [alt] attributes

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

    FR

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Khanacademy.fr can be misinterpreted by Google and other search engines. Our service has detected that French is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Khanacademy.fr main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

khanacademy.fr

Open Graph description is not detected on the main page of KHAN Academy. 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: