Tools & Wizards About Us
wereldschool.nl screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

wereldschool.nl

Afstandsonderwijs - Nederlands als tweede taal - niveautesten » Wereldschool - NL

Page Load Speed

3.6 sec in total

First Response

340 ms

Resources Loaded

3.1 sec

Page Rendered

176 ms

wereldschool.nl screenshot

About Website

Welcome to wereldschool.nl homepage info - get ready to check Wereldschool best content for Netherlands right away, or after learning these important things about wereldschool.nl

70 jaar ervaring met Nederlands onderwijs in het buitenland! Afstandsonderwijs op verschillende niveau's; van peuteronderwijs tot vwo. Bekijk onze lessen.

Visit wereldschool.nl

Key Findings

We analyzed Wereldschool.nl page load time and found that the first response time was 340 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

wereldschool.nl performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

12/100

10%

LCP (Largest Contentful Paint)

Value7.9 s

3/100

25%

SI (Speed Index)

Value7.9 s

23/100

10%

TBT (Total Blocking Time)

Value1,150 ms

22/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value14.3 s

9/100

10%

Network Requests Diagram

wereldschool.nl

340 ms

723 ms

style.ashx

356 ms

style.ashx

674 ms

bootstrap.min.css

39 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that 73% of them (44 requests) were addressed to the original Wereldschool.nl, 7% (4 requests) were made to Fonts.gstatic.com and 5% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (742 ms) belongs to the original domain Wereldschool.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 698.0 kB (33%)

Content Size

2.1 MB

After Optimization

1.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Wereldschool.nl main page is 2.1 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. Images take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 34.6 kB

  • Original 45.2 kB
  • After minification 43.6 kB
  • After compression 10.6 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 34.6 kB or 77% of the original size.

Image Optimization

-22%

Potential reduce by 360.4 kB

  • Original 1.6 MB
  • After minification 1.3 MB

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. Obviously, Wereldschool needs image optimization as it can save up to 360.4 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-63%

Potential reduce by 204.9 kB

  • Original 324.2 kB
  • After minification 319.2 kB
  • After compression 119.3 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 204.9 kB or 63% of the original size.

CSS Optimization

-84%

Potential reduce by 98.1 kB

  • Original 117.3 kB
  • After minification 117.2 kB
  • After compression 19.2 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. Wereldschool.nl needs all CSS files to be minified and compressed as it can save up to 98.1 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 29 (55%)

Requests Now

53

After Optimization

24

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Wereldschool. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

wereldschool.nl

wereldschool.nl

340 ms

723 ms

style.ashx

style.ashx

356 ms

style.ashx

style.ashx

674 ms

bootstrap.min.css

bootstrap.min.css

39 ms

css

css

39 ms

ScriptResource.axd

ScriptResource.axd

433 ms

js

js

167 ms

jquery.min.js

jquery.min.js

29 ms

bootstrap.min.js

bootstrap.min.js

12 ms

submenu.js

submenu.js

165 ms

slider.js

slider.js

169 ms

home.js

home.js

180 ms

Common.pack.js

Common.pack.js

335 ms

Page.pack.js

Page.pack.js

264 ms

nl-nl

nl-nl

274 ms

statistics.js

statistics.js

275 ms

catalog.js

catalog.js

354 ms

search.js

search.js

368 ms

scrollable.js

scrollable.js

360 ms

translate.js

translate.js

416 ms

ScriptResource.axd

ScriptResource.axd

426 ms

ScriptResource.axd

ScriptResource.axd

444 ms

ScriptResource.axd

ScriptResource.axd

440 ms

analytics.js

analytics.js

63 ms

ivio_wereldschool_logo.png

ivio_wereldschool_logo.png

149 ms

facebook.jpg

facebook.jpg

148 ms

twitter.jpg

twitter.jpg

147 ms

linkedin.jpg

linkedin.jpg

146 ms

3_xx_2_1.png

3_xx_2_1.png

516 ms

3_xx_2_1.jpg

3_xx_2_1.jpg

278 ms

3_xx_2_1.png

3_xx_2_1.png

742 ms

3_xx_2_1.jpg

3_xx_2_1.jpg

267 ms

3_xx_2_1.jpg

3_xx_2_1.jpg

512 ms

3_xx_2_1.jpg

3_xx_2_1.jpg

361 ms

3_xx_2_1.jpg

3_xx_2_1.jpg

436 ms

6_xx_2_1.jpg

6_xx_2_1.jpg

463 ms

transparent.png

transparent.png

407 ms

header_bg4.jpg

header_bg4.jpg

488 ms

zoekveld2.png

zoekveld2.png

493 ms

prev_slide.jpg

prev_slide.jpg

518 ms

next_slide.jpg

next_slide.jpg

561 ms

inloggen.png

inloggen.png

555 ms

aanmelden.png

aanmelden.png

574 ms

gtm.js

gtm.js

61 ms

StoreUserInfo

StoreUserInfo

612 ms

collect

collect

34 ms

xjAJXh38I15wypJXxuGMBp0EAVxt0G0biEntp43Qt6E.ttf

xjAJXh38I15wypJXxuGMBp0EAVxt0G0biEntp43Qt6E.ttf

13 ms

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

cJZKeOuBrn4kERxqtaUH3aCWcynf_cDxXwCLxiixG1c.ttf

20 ms

DXI1ORHCpsQm3Vp6mXoaTYnF5uFdDttMLvmWuJdhhgs.ttf

DXI1ORHCpsQm3Vp6mXoaTYnF5uFdDttMLvmWuJdhhgs.ttf

31 ms

k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf

k3k702ZOKiLJc3WVjuplzInF5uFdDttMLvmWuJdhhgs.ttf

30 ms

collect

collect

72 ms

ga.js

ga.js

23 ms

conversion.js

conversion.js

42 ms

fbevents.js

fbevents.js

143 ms

22 ms

style.ashx

style.ashx

91 ms

style.ashx

style.ashx

94 ms

style.ashx

style.ashx

91 ms

style.ashx

style.ashx

95 ms

Accessibility Review

wereldschool.nl accessibility score

91

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.

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 IDs are not unique

Best Practices

wereldschool.nl best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

wereldschool.nl SEO score

93

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

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 Wereldschool.nl 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 Wereldschool.nl 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

wereldschool.nl

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