Tools & Wizards About Us
duisterhout.nl screenshot

Report Summary

  • 6

    Performance

    Renders faster than
    21% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

duisterhout.nl

Duisterhoutschool – De Duisterhoutschool is de school voor speciaal onderwijs in Friesland. Ook voor voortgezet speciaal onderwijs kunt u terecht bij ...

Page Load Speed

5.7 sec in total

First Response

567 ms

Resources Loaded

4.8 sec

Page Rendered

371 ms

duisterhout.nl screenshot

About Website

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

De Duisterhoutschool is de school voor speciaal onderwijs in Friesland. Ook voor voortgezet speciaal onderwijs kunt u terecht bij de Duisterhoutschool.

Visit duisterhout.nl

Key Findings

We analyzed Duisterhout.nl page load time and found that the first response time was 567 ms and then it took 5.1 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

duisterhout.nl performance score

6

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value20.3 s

0/100

10%

LCP (Largest Contentful Paint)

Value36.8 s

0/100

25%

SI (Speed Index)

Value34.3 s

0/100

10%

TBT (Total Blocking Time)

Value5,340 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.307

38/100

15%

TTI (Time to Interactive)

Value39.5 s

0/100

10%

Network Requests Diagram

567 ms

foundation.css

513 ms

custom-frame.css

175 ms

custom-colors.css

175 ms

mailchimp.css

177 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 91% of them (40 requests) were addressed to the original Duisterhout.nl, 5% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Google.com. The less responsive or slowest element that took the longest time to load (3.2 sec) belongs to the original domain Duisterhout.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 504.6 kB (16%)

Content Size

3.1 MB

After Optimization

2.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Duisterhout.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. 45% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 19.7 kB

  • Original 24.4 kB
  • After minification 22.6 kB
  • After compression 4.8 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 19.7 kB or 80% of the original size.

Image Optimization

-2%

Potential reduce by 49.7 kB

  • Original 2.5 MB
  • After minification 2.5 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. Duisterhout images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 283.8 kB

  • Original 430.0 kB
  • After minification 422.0 kB
  • After compression 146.2 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 283.8 kB or 66% of the original size.

CSS Optimization

-88%

Potential reduce by 151.4 kB

  • Original 172.2 kB
  • After minification 133.7 kB
  • After compression 20.8 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. Duisterhout.nl needs all CSS files to be minified and compressed as it can save up to 151.4 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (28%)

Requests Now

43

After Optimization

31

  • Images
  • JavaScript
  • CSS

The browser has sent 43 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Duisterhout. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

567 ms

foundation.css

foundation.css

513 ms

custom-frame.css

custom-frame.css

175 ms

custom-colors.css

custom-colors.css

175 ms

mailchimp.css

mailchimp.css

177 ms

metro-widgets.css

metro-widgets.css

178 ms

cookiecuttr.css

cookiecuttr.css

254 ms

modernizr.js

modernizr.js

345 ms

api.js

api.js

87 ms

jquery.js

jquery.js

522 ms

foundation.min.js

foundation.min.js

537 ms

jquery.cookie.js

jquery.cookie.js

265 ms

jquery.cookiecuttr.js

jquery.cookiecuttr.js

429 ms

analytics.js

analytics.js

46 ms

recaptcha__nl.js

recaptcha__nl.js

65 ms

bg-wide.jpg

bg-wide.jpg

685 ms

logo@2x.png

logo@2x.png

195 ms

facebook.png

facebook.png

194 ms

twitter.png

twitter.png

194 ms

so-fryslan-logo1.png

so-fryslan-logo1.png

308 ms

timthumb.php

timthumb.php

486 ms

timthumb.php

timthumb.php

694 ms

timthumb.php

timthumb.php

1610 ms

timthumb.php

timthumb.php

1644 ms

timthumb.php

timthumb.php

740 ms

timthumb.php

timthumb.php

834 ms

arrow-white.png

arrow-white.png

856 ms

timthumb.php

timthumb.php

1041 ms

collect

collect

113 ms

timthumb.php

timthumb.php

1163 ms

timthumb.php

timthumb.php

2273 ms

timthumb.php

timthumb.php

2208 ms

timthumb.php

timthumb.php

1395 ms

timthumb.php

timthumb.php

1792 ms

timthumb.php

timthumb.php

1978 ms

timthumb.php

timthumb.php

2045 ms

timthumb.php

timthumb.php

2993 ms

timthumb.php

timthumb.php

2305 ms

timthumb.php

timthumb.php

2607 ms

timthumb.php

timthumb.php

2625 ms

timthumb.php

timthumb.php

2808 ms

timthumb.php

timthumb.php

2785 ms

timthumb.php

timthumb.php

2819 ms

timthumb.php

timthumb.php

3235 ms

Accessibility Review

duisterhout.nl accessibility score

94

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Best Practices

duisterhout.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

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

duisterhout.nl SEO score

98

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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Duisterhout.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it does not match the claimed English language. Our system also found out that Duisterhout.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

duisterhout.nl

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