Tools & Wizards About Us
onderwijsportaal.nl screenshot

Report Summary

  • 83

    Performance

    Renders faster than
    87% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

onderwijsportaal.nl

Het Onderwijsportaal: uitgebreide informatie over het onderwijs

Page Load Speed

15.1 sec in total

First Response

391 ms

Resources Loaded

14.3 sec

Page Rendered

374 ms

onderwijsportaal.nl screenshot

About Website

Welcome to onderwijsportaal.nl homepage info - get ready to check Onderwijsportaal best content for Netherlands right away, or after learning these important things about onderwijsportaal.nl

Het onderwijsportaal, een alternatief voor zoekmachines, geeft informatie over onderwijs, zowel particulier onderwijs als regulier onderwijs. Veel pagina's zijn direct bereikbaar via eigen domeinnamen...

Visit onderwijsportaal.nl

Key Findings

We analyzed Onderwijsportaal.nl page load time and found that the first response time was 391 ms and then it took 14.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

onderwijsportaal.nl performance score

83

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

61/100

25%

SI (Speed Index)

Value3.8 s

83/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.1 s

95/100

10%

Network Requests Diagram

onderwijsportaal.nl

391 ms

onderwijsportaal.nl

387 ms

www.onderwijsportaal.nl

789 ms

stylesheet.css

189 ms

branding.css

21 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 87% of them (27 requests) were addressed to the original Onderwijsportaal.nl, 6% (2 requests) were made to 301.goliath.nl and 3% (1 request) were made to Cse.google.com. The less responsive or slowest element that took the longest time to load (12.2 sec) relates to the external source 301.goliath.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 198.6 kB (14%)

Content Size

1.4 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Onderwijsportaal.nl main page is 1.4 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. 30% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 43.7 kB

  • Original 53.0 kB
  • After minification 45.4 kB
  • After compression 9.3 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 7.6 kB, which is 14% 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 43.7 kB or 82% of the original size.

Image Optimization

-9%

Potential reduce by 123.2 kB

  • Original 1.3 MB
  • After minification 1.2 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. Onderwijsportaal images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 6.5 kB

  • Original 8.6 kB
  • After minification 6.3 kB
  • After compression 2.1 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 6.5 kB or 76% of the original size.

CSS Optimization

-93%

Potential reduce by 25.1 kB

  • Original 26.9 kB
  • After minification 23.6 kB
  • After compression 1.7 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. Onderwijsportaal.nl needs all CSS files to be minified and compressed as it can save up to 25.1 kB or 93% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

28

After Optimization

28

  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Onderwijsportaal. According to our analytics all requests are already optimized.

Network Requests Diagram

onderwijsportaal.nl

onderwijsportaal.nl

391 ms

onderwijsportaal.nl

onderwijsportaal.nl

387 ms

www.onderwijsportaal.nl

www.onderwijsportaal.nl

789 ms

stylesheet.css

stylesheet.css

189 ms

branding.css

branding.css

21 ms

logo-sites-voor-smartphones.jpg

logo-sites-voor-smartphones.jpg

290 ms

logo-nha-opleidingen.png

logo-nha-opleidingen.png

385 ms

lijn-blauw-598.gif

lijn-blauw-598.gif

286 ms

logo-dns-160.gif

logo-dns-160.gif

307 ms

logo-winford-vo-2015.gif

logo-winford-vo-2015.gif

399 ms

logo-bijlesnu2.jpg

logo-bijlesnu2.jpg

397 ms

logo-luzac-2016.gif

logo-luzac-2016.gif

391 ms

logo-winford-po.png

logo-winford-po.png

391 ms

vlag-engelse-vlag.jpg

vlag-engelse-vlag.jpg

523 ms

logo-owp.jpg

logo-owp.jpg

670 ms

shoot-1weerspiegeling.jpg

shoot-1weerspiegeling.jpg

819 ms

shoot-2weerspiegeling.jpg

shoot-2weerspiegeling.jpg

869 ms

logo-chatgpt.png

logo-chatgpt.png

783 ms

logo-vakdidactiek.png

logo-vakdidactiek.png

508 ms

logo-vacaturesinhetonderwijs.png

logo-vacaturesinhetonderwijs.png

616 ms

301.goliath.nl

301.goliath.nl

615 ms

logo-nha-studeer-nu-gratis.gif

logo-nha-studeer-nu-gratis.gif

543 ms

logo-iva-blauw.png

logo-iva-blauw.png

635 ms

logo-tmo.png

logo-tmo.png

736 ms

logo-new-school.jpg

logo-new-school.jpg

688 ms

logo-tio-bs.png

logo-tio-bs.png

737 ms

logo-bo-kronenburgh.gif

logo-bo-kronenburgh.gif

788 ms

logo-nha-welkomstcadeau.gif

logo-nha-welkomstcadeau.gif

801 ms

logo-typetuin.jpg

logo-typetuin.jpg

838 ms

n.gif

n.gif

12155 ms

tag

tag

310 ms

Accessibility Review

onderwijsportaal.nl accessibility score

63

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

Best Practices

onderwijsportaal.nl best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

onderwijsportaal.nl SEO score

91

Search Engine Optimization Advices

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

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Onderwijsportaal.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 Onderwijsportaal.nl main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

onderwijsportaal.nl

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