Tools & Wizards About Us
coursesites.com screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 89% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 89

    SEO

    Google-friendlier than
    67% of websites

coursesites.com

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Page Load Speed

1 sec in total

First Response

141 ms

Resources Loaded

748 ms

Page Rendered

146 ms

coursesites.com screenshot

About Website

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Key Findings

We analyzed Coursesites.com page load time and found that the first response time was 141 ms and then it took 894 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster. This domain responded with an error, which can significantly jeopardize Coursesites.com rating and web reputation

Performance Metrics

coursesites.com performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value3.5 s

64/100

25%

SI (Speed Index)

Value5.6 s

52/100

10%

TBT (Total Blocking Time)

Value2,200 ms

6/100

30%

CLS (Cumulative Layout Shift)

Value0.859

4/100

15%

TTI (Time to Interactive)

Value14.2 s

9/100

10%

Network Requests Diagram

index.html

141 ms

ga.js

68 ms

uniform.cs.css

96 ms

fancybox.css

96 ms

master.css

104 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 79% of them (33 requests) were addressed to the original Coursesites.com, 7% (3 requests) were made to Ssl.google-analytics.com and 2% (1 request) were made to Twitter-badges.s3.amazonaws.com. The less responsive or slowest element that took the longest time to load (288 ms) relates to the external source Twitter-badges.s3.amazonaws.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 495.3 kB (70%)

Content Size

709.8 kB

After Optimization

214.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Coursesites.com main page is 709.8 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. 25% of websites need less resources to load. Javascripts take 498.4 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 17.0 kB

  • Original 22.7 kB
  • After minification 19.7 kB
  • After compression 5.7 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. This page needs HTML code to be minified as it can gain 3.0 kB, which is 13% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 17.0 kB or 75% of the original size.

Image Optimization

-8%

Potential reduce by 6.5 kB

  • Original 80.4 kB
  • After minification 73.9 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. Coursesites images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 377.1 kB

  • Original 498.4 kB
  • After minification 383.6 kB
  • After compression 121.3 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 377.1 kB or 76% of the original size.

CSS Optimization

-87%

Potential reduce by 94.7 kB

  • Original 108.3 kB
  • After minification 79.3 kB
  • After compression 13.6 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. Coursesites.com needs all CSS files to be minified and compressed as it can save up to 94.7 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (56%)

Requests Now

39

After Optimization

17

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Coursesites. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

index.html

index.html

141 ms

ga.js

ga.js

68 ms

uniform.cs.css

uniform.cs.css

96 ms

fancybox.css

fancybox.css

96 ms

master.css

master.css

104 ms

dropdown.css

dropdown.css

99 ms

fastinit.js

fastinit.js

46 ms

i18n.js

i18n.js

47 ms

libsNew.js

libsNew.js

109 ms

base64.js

base64.js

58 ms

md5.js

md5.js

96 ms

md5-legacy.js

md5-legacy.js

148 ms

validate_login.js

validate_login.js

118 ms

cookie.js

cookie.js

118 ms

prettyPhoto.css

prettyPhoto.css

170 ms

jquery.prettyPhoto.js

jquery.prettyPhoto.js

212 ms

prototype.js

prototype.js

177 ms

jstorage.js

jstorage.js

233 ms

version_pinned_scriptaculous.js

version_pinned_scriptaculous.js

172 ms

stats.js

stats.js

231 ms

cookieConsent.js

cookieConsent.js

230 ms

__utm.gif

__utm.gif

20 ms

__utm.gif

__utm.gif

29 ms

builder.js

builder.js

11 ms

effects.js

effects.js

19 ms

dragdrop.js

dragdrop.js

28 ms

controls.js

controls.js

30 ms

t_small-a.png

t_small-a.png

288 ms

youtube_24x24.png

youtube_24x24.png

94 ms

laptop-front.jpg

laptop-front.jpg

68 ms

moocVideo.jpg

moocVideo.jpg

69 ms

adobe_logo.jpg

adobe_logo.jpg

68 ms

all.js

all.js

96 ms

bullet_green_down.png

bullet_green_down.png

64 ms

logo_coursesites.png

logo_coursesites.png

130 ms

infographic.png

infographic.png

133 ms

cs-facebook.png

cs-facebook.png

107 ms

logo-footer-black.png

logo-footer-black.png

108 ms

23BA9D_0_0.woff

23BA9D_0_0.woff

139 ms

country.js

country.js

116 ms

106 ms

xd_arbiter.php

xd_arbiter.php

71 ms

Accessibility Review

coursesites.com accessibility score

96

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

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

coursesites.com 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

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

coursesites.com SEO score

89

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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 Coursesites.com 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 Coursesites.com 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

coursesites.com

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