Tools & Wizards About Us

Report Summary

  • 13

    Performance

    Renders faster than
    25% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

pt.khanacademy.org

Khan Academy | Cursos, aulas e prática on-line gratuitos

Page Load Speed

2.9 sec in total

First Response

376 ms

Resources Loaded

1.9 sec

Page Rendered

593 ms

About Website

Click here to check amazing Pt Khan Academy content for United States. Otherwise, check out these important facts you probably never knew about pt.khanacademy.org

Aprenda Matemática, Artes, Programação de Computadores, Economia, Física, Química, Biologia, Medicina, Finanças, História e muito mais, gratuitamente. A Khan Academy é uma organização sem fins lucrati...

Visit pt.khanacademy.org

Key Findings

We analyzed Pt.khanacademy.org page load time and found that the first response time was 376 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

pt.khanacademy.org performance score

13

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value21.9 s

0/100

25%

SI (Speed Index)

Value11.8 s

4/100

10%

TBT (Total Blocking Time)

Value2,300 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.413

24/100

15%

TTI (Time to Interactive)

Value23.5 s

1/100

10%

Network Requests Diagram

pt.khanacademy.org

376 ms

fbevents.js

427 ms

analytics.js

114 ms

homepage-package-114a6b.css

202 ms

mobile-package-9eea13.css

193 ms

Our browser made a total of 35 requests to load all elements on the main page. We found that 9% of them (3 requests) were addressed to the original Pt.khanacademy.org, 63% (22 requests) were made to Khanacademy.org and 9% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (427 ms) relates to the external source Connect.facebook.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (72%)

Content Size

1.4 MB

After Optimization

398.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Pt.khanacademy.org main page is 1.4 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. 45% of websites need less resources to load. Javascripts take 827.2 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 227.7 kB

  • Original 283.9 kB
  • After minification 261.9 kB
  • After compression 56.1 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 227.7 kB or 80% of the original size.

Image Optimization

-2%

Potential reduce by 1.4 kB

  • Original 59.5 kB
  • After minification 58.1 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. Pt Khan Academy images are well optimized though.

JavaScript Optimization

-71%

Potential reduce by 587.4 kB

  • Original 827.2 kB
  • After minification 827.2 kB
  • After compression 239.8 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 587.4 kB or 71% of the original size.

CSS Optimization

-83%

Potential reduce by 218.5 kB

  • Original 262.8 kB
  • After minification 262.8 kB
  • After compression 44.2 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. Pt.khanacademy.org needs all CSS files to be minified and compressed as it can save up to 218.5 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (65%)

Requests Now

31

After Optimization

11

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Pt 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 18 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

pt.khanacademy.org accessibility score

84

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

pt.khanacademy.org best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

High

Missing source maps for large first-party JavaScript

SEO Factors

pt.khanacademy.org SEO score

90

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

    PT

  • Language Claimed

    PT

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Pt.khanacademy.org can be misinterpreted by Google and other search engines. Our service has detected that Portuguese is used on the page, and it matches the claimed language. Our system also found out that Pt.khanacademy.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

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