Report Summary

  • 41

    Performance

    Renders faster than
    61% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% 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

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

38/100

10%

LCP (Largest Contentful Paint)

Value9.4 s

0/100

25%

SI (Speed Index)

Value6.2 s

43/100

10%

TBT (Total Blocking Time)

Value500 ms

58/100

30%

CLS (Cumulative Layout Shift)

Value0.147

76/100

15%

TTI (Time to Interactive)

Value8.7 s

36/100

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 410.7 kB (14%)

Content Size

3.0 MB

After Optimization

2.6 MB

In fact, the total size of Vijverhofschool.nl main page is 3.0 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

-31%

Potential reduce by 78.2 kB

  • Original 249.5 kB
  • After minification 249.5 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 78.2 kB or 31% 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

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.

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

83

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

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

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: