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vijverhofschool.nl screenshot

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

vijverhofschool.nl

Onderwijsgroep Buitengewoon - Onderwijsgroep Buitengewoon

Page Load Speed

4.6 sec in total

First Response

432 ms

Resources Loaded

2.7 sec

Page Rendered

1.4 sec

vijverhofschool.nl screenshot

About Website

Welcome to vijverhofschool.nl homepage info - get ready to check Vijverhofschool best content right away, or after learning these important things about vijverhofschool.nl

Onderwijsgroep Buitengewoon is de overkoepelende organisatie van zeven scholen voor (voortgezet) speciaal onderwijs, praktijkonderwijs en Advies & begeleiding. Wij bieden kinderen en jongeren met spec...

Visit vijverhofschool.nl

Key Findings

We analyzed Vijverhofschool.nl page load time and found that the first response time was 432 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

vijverhofschool.nl performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

37/100

10%

LCP (Largest Contentful Paint)

Value9.5 s

0/100

25%

SI (Speed Index)

Value6.3 s

41/100

10%

TBT (Total Blocking Time)

Value600 ms

50/100

30%

CLS (Cumulative Layout Shift)

Value0.144

77/100

15%

TTI (Time to Interactive)

Value9.2 s

32/100

10%

Network Requests Diagram

vijverhofschool.nl

432 ms

www.ogbuitengewoon.nl

568 ms

font-awesome.min.css

121 ms

9786125b-6611-47a2-8970-18ee647cc8bf.css

269 ms

bootstrap.min.css

270 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Vijverhofschool.nl, 75% (45 requests) were made to Ogbuitengewoon.nl and 12% (7 requests) were made to Fast.fonts.net. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source Ogbuitengewoon.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 442.6 kB (15%)

Content Size

3.1 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vijverhofschool.nl main page is 3.1 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. 60% of websites need less resources to load. Images take 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 44.3 kB

  • Original 50.0 kB
  • After minification 32.3 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 17.7 kB, which is 35% 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 44.3 kB or 89% of the original size.

Image Optimization

-10%

Potential reduce by 279.4 kB

  • Original 2.7 MB
  • After minification 2.4 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. Vijverhofschool images are well optimized though.

JavaScript Optimization

-39%

Potential reduce by 110.2 kB

  • Original 281.4 kB
  • After minification 281.4 kB
  • After compression 171.2 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 110.2 kB or 39% of the original size.

CSS Optimization

-20%

Potential reduce by 8.7 kB

  • Original 43.1 kB
  • After minification 42.1 kB
  • After compression 34.3 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. Vijverhofschool.nl needs all CSS files to be minified and compressed as it can save up to 8.7 kB or 20% of the original size.

Requests Breakdown

Number of requests can be reduced by 21 (42%)

Requests Now

50

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 50 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vijverhofschool. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vijverhofschool.nl

vijverhofschool.nl

432 ms

www.ogbuitengewoon.nl

www.ogbuitengewoon.nl

568 ms

font-awesome.min.css

font-awesome.min.css

121 ms

9786125b-6611-47a2-8970-18ee647cc8bf.css

9786125b-6611-47a2-8970-18ee647cc8bf.css

269 ms

bootstrap.min.css

bootstrap.min.css

270 ms

owl.carousel.css

owl.carousel.css

372 ms

owl.transitions.css

owl.transitions.css

371 ms

owl.theme.css

owl.theme.css

368 ms

color.css

color.css

371 ms

style.css

style.css

377 ms

fullcalendar.css

fullcalendar.css

367 ms

bootstrap-select.min.css

bootstrap-select.min.css

443 ms

jquery.fancybox.css

jquery.fancybox.css

448 ms

js

js

246 ms

ReadSpeaker.js

ReadSpeaker.js

412 ms

jquery.min.js

jquery.min.js

133 ms

bootstrap.min.js

bootstrap.min.js

645 ms

owl.carousel.js

owl.carousel.js

645 ms

moment.min.js

moment.min.js

646 ms

fullcalendar.js

fullcalendar.js

772 ms

lang-all.js

lang-all.js

694 ms

jquery.fancybox.pack.js

jquery.fancybox.pack.js

694 ms

hoverIntent.min.js

hoverIntent.min.js

694 ms

bootstrap-select.min.js

bootstrap-select.min.js

693 ms

scripts.js

scripts.js

693 ms

logo_onderwijsgroep_buitengewoon.jpg

logo_onderwijsgroep_buitengewoon.jpg

952 ms

8.png

8.png

1193 ms

Slider%20Velddijk%203.jpg

Slider%20Velddijk%203.jpg

953 ms

spectrum_070920_55.jpg

spectrum_070920_55.jpg

952 ms

14.png

14.png

1254 ms

Impuls%20160920%2005%20(1).jpg

Impuls%20160920%2005%20(1).jpg

1037 ms

Save%20the%20date%20Jubileumweek_scholen.png

Save%20the%20date%20Jubileumweek_scholen.png

998 ms

dsc_2572.jpg

dsc_2572.jpg

998 ms

Mondkapje.jpg

Mondkapje.jpg

1025 ms

Interview%20Merel%20Geraedts%20Ulingshof%20a.jpg

Interview%20Merel%20Geraedts%20Ulingshof%20a.jpg

1056 ms

Fotocollage.JPG

Fotocollage.JPG

1081 ms

Velddijk%20070920%2010.jpg

Velddijk%20070920%2010.jpg

1099 ms

Boek%20storytelling.jpg

Boek%20storytelling.jpg

1135 ms

Geijsteren%20270516-087.jpg

Geijsteren%20270516-087.jpg

1161 ms

Vacatures.png

Vacatures.png

1171 ms

analytics.js

analytics.js

224 ms

icon_schools.png

icon_schools.png

723 ms

icon_company.png

icon_company.png

764 ms

icon_collaborate.png

icon_collaborate.png

781 ms

icon_search.png

icon_search.png

783 ms

home_news_advice_bg.jpg

home_news_advice_bg.jpg

810 ms

bg_flex_left.png

bg_flex_left.png

802 ms

bg_flex_center.png

bg_flex_center.png

849 ms

bg_flex_right.png

bg_flex_right.png

863 ms

footer_bg.jpg

footer_bg.jpg

877 ms

icon_questions.png

icon_questions.png

864 ms

1ff86dd4-d3b2-4325-89bc-c6eb493cedba.woff

1ff86dd4-d3b2-4325-89bc-c6eb493cedba.woff

52 ms

d1134ca1-d07a-416b-83a8-020b6b118e0d.woff

d1134ca1-d07a-416b-83a8-020b6b118e0d.woff

108 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

51 ms

6793baf2-5437-4d90-bc90-9608d0c25241.woff

6793baf2-5437-4d90-bc90-9608d0c25241.woff

267 ms

5432178c-7a69-4acc-ad45-f1f991a76f1f.woff

5432178c-7a69-4acc-ad45-f1f991a76f1f.woff

267 ms

c9399fda-6be8-4d66-9349-ab18d5a19375.woff

c9399fda-6be8-4d66-9349-ab18d5a19375.woff

265 ms

018d0b69-ca0b-43a6-84c6-c638e2271f86.woff

018d0b69-ca0b-43a6-84c6-c638e2271f86.woff

262 ms

collect

collect

63 ms

slider_overlay.png

slider_overlay.png

422 ms

Accessibility Review

vijverhofschool.nl accessibility score

65

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

Best Practices

vijverhofschool.nl 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

vijverhofschool.nl SEO score

83

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

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

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 Vijverhofschool.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 Vijverhofschool.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

vijverhofschool.nl

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