Tools & Wizards About Us

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

herenwaard.nl

VSO Herenwaard, speciaal onderwijs voor ZMLK in Rotterdam

Page Load Speed

6.5 sec in total

First Response

814 ms

Resources Loaded

4.6 sec

Page Rendered

1 sec

About Website

Click here to check amazing Herenwaard content for Netherlands. Otherwise, check out these important facts you probably never knew about herenwaard.nl

VSO Herenwaard, speciaal onderwijs, Rotterdam, zeer moeilijk lerende kinderen, ZMLK, VSO, Cluster 3, special educational needs, IJsselmonde, Rotterdam-Zuid, autisme, BOOR, voortgezet, DOORSTROOM

Visit herenwaard.nl

Key Findings

We analyzed Herenwaard.nl page load time and found that the first response time was 814 ms and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

herenwaard.nl performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

25/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

52/100

25%

SI (Speed Index)

Value12.9 s

2/100

10%

TBT (Total Blocking Time)

Value2,690 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value25.5 s

0/100

10%

Network Requests Diagram

www.herenwaard.nl

814 ms

43-config.js

89 ms

43-1-lang.js

176 ms

main.css

596 ms

nav.css

646 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that 12% of them (6 requests) were addressed to the original Herenwaard.nl, 55% (28 requests) were made to Cdn1.herenwaard.nl and 12% (6 requests) were made to Youtube.com. The less responsive or slowest element that took the longest time to load (860 ms) relates to the external source Cdn1.herenwaard.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 503.5 kB (42%)

Content Size

1.2 MB

After Optimization

686.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Herenwaard.nl main page is 1.2 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 650.1 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 12.5 kB

  • Original 17.0 kB
  • After minification 16.9 kB
  • After compression 4.5 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 12.5 kB or 74% of the original size.

Image Optimization

-22%

Potential reduce by 140.6 kB

  • Original 650.1 kB
  • After minification 509.6 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. Obviously, Herenwaard needs image optimization as it can save up to 140.6 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

-23%

Potential reduce by 33.7 kB

  • Original 145.7 kB
  • After minification 145.2 kB
  • After compression 111.9 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 33.7 kB or 23% of the original size.

CSS Optimization

-84%

Potential reduce by 316.7 kB

  • Original 377.3 kB
  • After minification 375.0 kB
  • After compression 60.7 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. Herenwaard.nl needs all CSS files to be minified and compressed as it can save up to 316.7 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (42%)

Requests Now

45

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 45 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Herenwaard. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

herenwaard.nl accessibility score

74

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.

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

High

Links do not have a discernible name

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

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

herenwaard.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

herenwaard.nl SEO score

97

Search Engine Optimization Advices

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Herenwaard.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Herenwaard.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 description is not detected on the main page of Herenwaard. 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: