Tools & Wizards About Us
zelfstudie.be screenshot

Report Summary

  • 93

    Performance

    Renders faster than
    92% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

zelfstudie.be

Zelfstudie.be - cursussen en handleidingen webdesign: drupal, wordpress, html5, adobe photoshop, apps & games maken, joomla

Page Load Speed

2 sec in total

First Response

318 ms

Resources Loaded

1.3 sec

Page Rendered

380 ms

zelfstudie.be screenshot

About Website

Welcome to zelfstudie.be homepage info - get ready to check Zelfstudie best content for Belgium right away, or after learning these important things about zelfstudie.be

Via cursussen, tutorials en handleidingen op Zelfstudie.be leert u werken met Photoshop, Wordpress, Drupal, HTML5 en CSS3, Indesign, Webwinkel, Magento, SEO, enz. Leer je eigen app en game maken via a...

Visit zelfstudie.be

Key Findings

We analyzed Zelfstudie.be page load time and found that the first response time was 318 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

zelfstudie.be performance score

93

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

82/100

10%

LCP (Largest Contentful Paint)

Value2.1 s

96/100

25%

SI (Speed Index)

Value2.6 s

97/100

10%

TBT (Total Blocking Time)

Value160 ms

94/100

30%

CLS (Cumulative Layout Shift)

Value0.012

100/100

15%

TTI (Time to Interactive)

Value5.1 s

75/100

10%

Network Requests Diagram

zelfstudie.be

318 ms

style2015.min.css

194 ms

jquery.min.js

19 ms

bootstrap.min.js

163 ms

zelfstudie-logo-trans.png

177 ms

Our browser made a total of 50 requests to load all elements on the main page. We found that 84% of them (42 requests) were addressed to the original Zelfstudie.be, 6% (3 requests) were made to Fonts.gstatic.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (755 ms) belongs to the original domain Zelfstudie.be.

Page Optimization Overview & Recommendations

Page size can be reduced by 67.3 kB (9%)

Content Size

742.6 kB

After Optimization

675.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zelfstudie.be main page is 742.6 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. 30% of websites need less resources to load. Images take 602.1 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 18.6 kB

  • Original 24.8 kB
  • After minification 23.0 kB
  • After compression 6.2 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 18.6 kB or 75% of the original size.

Image Optimization

-3%

Potential reduce by 16.6 kB

  • Original 602.1 kB
  • After minification 585.5 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. Zelfstudie images are well optimized though.

JavaScript Optimization

-33%

Potential reduce by 32.0 kB

  • Original 95.9 kB
  • After minification 95.9 kB
  • After compression 63.9 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 32.0 kB or 33% of the original size.

CSS Optimization

-0%

Potential reduce by 44 B

  • Original 19.8 kB
  • After minification 19.8 kB
  • After compression 19.8 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. Zelfstudie.be has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 12 (26%)

Requests Now

46

After Optimization

34

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zelfstudie. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zelfstudie.be

zelfstudie.be

318 ms

style2015.min.css

style2015.min.css

194 ms

jquery.min.js

jquery.min.js

19 ms

bootstrap.min.js

bootstrap.min.js

163 ms

zelfstudie-logo-trans.png

zelfstudie-logo-trans.png

177 ms

videolessen.png

videolessen.png

176 ms

voet.png

voet.png

182 ms

padlock-closed.png

padlock-closed.png

185 ms

tut-boven.png

tut-boven.png

287 ms

gdpr.jpg

gdpr.jpg

288 ms

minecraft.jpg

minecraft.jpg

287 ms

instagram.jpg

instagram.jpg

289 ms

tut-onder.png

tut-onder.png

289 ms

code-icoon.png

code-icoon.png

289 ms

app-icoon.png

app-icoon.png

327 ms

game-icoon.png

game-icoon.png

352 ms

design-icoon.png

design-icoon.png

352 ms

cursussen1.jpg

cursussen1.jpg

378 ms

cursussen2.jpg

cursussen2.jpg

382 ms

icoon-voordeel2.jpg

icoon-voordeel2.jpg

390 ms

icoon-voordeel4.jpg

icoon-voordeel4.jpg

456 ms

icoon-voordeel3.jpg

icoon-voordeel3.jpg

457 ms

icoon-voordeel1.jpg

icoon-voordeel1.jpg

455 ms

icoon-voordeel5.jpg

icoon-voordeel5.jpg

468 ms

icoon-voordeel6.jpg

icoon-voordeel6.jpg

479 ms

icoon-blog.png

icoon-blog.png

483 ms

icoon-team.png

icoon-team.png

491 ms

jong-oud.png

jong-oud.png

527 ms

icoon-quote.jpg

icoon-quote.jpg

526 ms

heidi.png

heidi.png

559 ms

jan.png

jan.png

581 ms

icoon-groenveld.jpg

icoon-groenveld.jpg

579 ms

an.png

an.png

572 ms

fb.png

fb.png

625 ms

tw.png

tw.png

613 ms

google-plus.png

google-plus.png

648 ms

css

css

39 ms

bg-dame.jpg

bg-dame.jpg

644 ms

tut-achter.png

tut-achter.png

425 ms

nieuw.jpg

nieuw.jpg

426 ms

update.jpg

update.jpg

455 ms

browser.jpg

browser.jpg

550 ms

bg-desk.jpg

bg-desk.jpg

755 ms

font

font

41 ms

analytics.js

analytics.js

18 ms

font

font

45 ms

font

font

78 ms

glyphicons-halflings-regular.woff

glyphicons-halflings-regular.woff

575 ms

collect

collect

24 ms

js

js

58 ms

Accessibility Review

zelfstudie.be accessibility score

96

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.

Best Practices

zelfstudie.be best practices score

75

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

Page has valid source maps

SEO Factors

zelfstudie.be SEO score

90

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

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

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

zelfstudie.be

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