Tools & Wizards About Us
dezonnewijzer.nl screenshot

Report Summary

  • 47

    Performance

    Renders faster than
    65% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 91% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

dezonnewijzer.nl

PC Basisschool De Zonnewijzer Leidschendam

Page Load Speed

2.2 sec in total

First Response

363 ms

Resources Loaded

1.6 sec

Page Rendered

203 ms

dezonnewijzer.nl screenshot

About Website

Click here to check amazing De Zonnewijzer content. Otherwise, check out these important facts you probably never knew about dezonnewijzer.nl

Basisschool De Zonnewijzer, een school in het hartje van Leidschendam. Gevestigd in een modern gebouw met een eigen gymnastiekzaal en een veilig afgesloten schoolplein.

Visit dezonnewijzer.nl

Key Findings

We analyzed Dezonnewijzer.nl page load time and found that the first response time was 363 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

dezonnewijzer.nl performance score

47

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value12.0 s

0/100

25%

SI (Speed Index)

Value8.0 s

22/100

10%

TBT (Total Blocking Time)

Value240 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value9.2 s

32/100

10%

Network Requests Diagram

dezonnewijzer.nl

363 ms

uni.css

89 ms

uniscript.js

174 ms

flash.js

177 ms

bg1-new.jpg

502 ms

Our browser made a total of 13 requests to load all elements on the main page. We found that all of those requests were addressed to Dezonnewijzer.nl and no external sources were called. The less responsive or slowest element that took the longest time to load (964 ms) belongs to the original domain Dezonnewijzer.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 52.3 kB (5%)

Content Size

1.0 MB

After Optimization

986.2 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Dezonnewijzer.nl main page is 1.0 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. Only 10% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 13.9 kB

  • Original 16.9 kB
  • After minification 16.5 kB
  • After compression 3.0 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 13.9 kB or 82% of the original size.

Image Optimization

-3%

Potential reduce by 30.7 kB

  • Original 1.0 MB
  • After minification 982.0 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. De Zonnewijzer images are well optimized though.

CSS Optimization

-88%

Potential reduce by 7.8 kB

  • Original 8.9 kB
  • After minification 6.9 kB
  • After compression 1.1 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. Dezonnewijzer.nl needs all CSS files to be minified and compressed as it can save up to 7.8 kB or 88% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

10

After Optimization

10

  • Images
  • CSS

The browser has sent 10 CSS, Javascripts, AJAX and image requests in order to completely render the main page of De Zonnewijzer. According to our analytics all requests are already optimized.

Network Requests Diagram

dezonnewijzer.nl

dezonnewijzer.nl

363 ms

uni.css

uni.css

89 ms

uniscript.js

uniscript.js

174 ms

flash.js

flash.js

177 ms

bg1-new.jpg

bg1-new.jpg

502 ms

nixel.gif

nixel.gif

87 ms

dzw001.jpg

dzw001.jpg

485 ms

team.jpg

team.jpg

964 ms

1t.jpg

1t.jpg

196 ms

1t.jpg

1t.jpg

221 ms

1t.jpg

1t.jpg

189 ms

1t.jpg

1t.jpg

284 ms

bg2-1.jpg

bg2-1.jpg

107 ms

Accessibility Review

dezonnewijzer.nl accessibility score

97

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.

Best Practices

dezonnewijzer.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

SEO Factors

dezonnewijzer.nl SEO score

92

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Dezonnewijzer.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 Dezonnewijzer.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

dezonnewijzer.nl

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