Tools & Wizards About Us
wij-leren.nl screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    50% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 84

    SEO

    Google-friendlier than
    53% of websites

wij-leren.nl

Wij-leren.nl - kennis over onderwijs en scholen

Page Load Speed

2.4 sec in total

First Response

370 ms

Resources Loaded

1.7 sec

Page Rendered

375 ms

wij-leren.nl screenshot

About Website

Visit wij-leren.nl now to see the best up-to-date Wij Leren content for Netherlands and also check out these interesting facts you probably never knew about wij-leren.nl

Je onderwijskundige kennis blijft op peil door het volgen van Wij-leren.nl, kennisplatform voor het onderwijs. Met onderwijskundige kennisbank en een helder beschreven begrippenkader.

Visit wij-leren.nl

Key Findings

We analyzed Wij-leren.nl page load time and found that the first response time was 370 ms and then it took 2 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

wij-leren.nl performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

44/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value5.5 s

54/100

10%

TBT (Total Blocking Time)

Value3,110 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.7 s

14/100

10%

Network Requests Diagram

wij-leren.nl

370 ms

jquery-ui.css

6 ms

jquery-1.10.2.js

14 ms

jquery-ui.js

12 ms

standaard.js

87 ms

Our browser made a total of 65 requests to load all elements on the main page. We found that 66% of them (43 requests) were addressed to the original Wij-leren.nl, 6% (4 requests) were made to Pagead2.googlesyndication.com and 6% (4 requests) were made to S7.addthis.com. The less responsive or slowest element that took the longest time to load (947 ms) belongs to the original domain Wij-leren.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 642.9 kB (52%)

Content Size

1.2 MB

After Optimization

589.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Wij-leren.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. 70% of websites need less resources to load. Javascripts take 672.8 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 112.1 kB

  • Original 148.9 kB
  • After minification 148.3 kB
  • After compression 36.8 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 112.1 kB or 75% of the original size.

Image Optimization

-16%

Potential reduce by 59.1 kB

  • Original 371.9 kB
  • After minification 312.7 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, Wij Leren needs image optimization as it can save up to 59.1 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-66%

Potential reduce by 445.3 kB

  • Original 672.8 kB
  • After minification 672.6 kB
  • After compression 227.4 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 445.3 kB or 66% of the original size.

CSS Optimization

-68%

Potential reduce by 26.4 kB

  • Original 38.9 kB
  • After minification 34.7 kB
  • After compression 12.5 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. Wij-leren.nl needs all CSS files to be minified and compressed as it can save up to 26.4 kB or 68% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (32%)

Requests Now

60

After Optimization

41

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 60 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Wij Leren. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

wij-leren.nl

wij-leren.nl

370 ms

jquery-ui.css

jquery-ui.css

6 ms

jquery-1.10.2.js

jquery-1.10.2.js

14 ms

jquery-ui.js

jquery-ui.js

12 ms

standaard.js

standaard.js

87 ms

css

css

71 ms

style.css

style.css

173 ms

adsbygoogle.js

adsbygoogle.js

69 ms

addthis_widget.js

addthis_widget.js

68 ms

dc.js

dc.js

200 ms

300lo.json

300lo.json

69 ms

counter.e06ccbeb85753d56d6a9.js

counter.e06ccbeb85753d56d6a9.js

53 ms

bg_algemeen.jpg

bg_algemeen.jpg

131 ms

bg_header.jpg

bg_header.jpg

276 ms

twitter.png

twitter.png

281 ms

linkedin.png

linkedin.png

276 ms

facebook.png

facebook.png

277 ms

zoek.png

zoek.png

277 ms

survey_home.png

survey_home.png

278 ms

kinderen-wij-leren-350.jpg

kinderen-wij-leren-350.jpg

365 ms

survey_verdieping.png

survey_verdieping.png

295 ms

zorgklas-100.jpg

zorgklas-100.jpg

367 ms

survey_samenvatting.png

survey_samenvatting.png

296 ms

Beweging-ontwikkeling-100.jpg

Beweging-ontwikkeling-100.jpg

374 ms

buitenschools-leren-ipc-curriculum-100.jpg

buitenschools-leren-ipc-curriculum-100.jpg

304 ms

deeltijder-duo-leerkracht-parttime-100.jpg

deeltijder-duo-leerkracht-parttime-100.jpg

450 ms

luisteren-sturen-100.jpg

luisteren-sturen-100.jpg

372 ms

mythe-leerstijlen-digital-native-neurowetenscha-100.jpg

mythe-leerstijlen-digital-native-neurowetenscha-100.jpg

482 ms

ouderbetrokkenheid-hgw-constructieve-communicatie-100.jpg

ouderbetrokkenheid-hgw-constructieve-communicatie-100.jpg

455 ms

spiritualiteit-bestuur-management-100.jpg

spiritualiteit-bestuur-management-100.jpg

447 ms

onderwijsblad-300x250.png

onderwijsblad-300x250.png

622 ms

160112%20Alles-in-1_Banner_300x250.gif

160112%20Alles-in-1_Banner_300x250.gif

456 ms

kiplekker-lespakket.gif

kiplekker-lespakket.gif

695 ms

dossiershome.png

dossiershome.png

531 ms

coachen-executieve-functies-100.jpg

coachen-executieve-functies-100.jpg

545 ms

de-lerende-mens-100.jpg

de-lerende-mens-100.jpg

542 ms

ga-tot-de-mier-100.jpg

ga-tot-de-mier-100.jpg

661 ms

lesgeven-aan-getraumatiseerde-kinderen-100.jpg

lesgeven-aan-getraumatiseerde-kinderen-100.jpg

616 ms

luister-je-wel-naar-mij-100.jpg

luister-je-wel-naar-mij-100.jpg

626 ms

onderzoek-algemeen.jpg

onderzoek-algemeen.jpg

635 ms

banner-nieuwsbrief.jpg

banner-nieuwsbrief.jpg

947 ms

footer_3.gif

footer_3.gif

703 ms

ln_mobiel.png

ln_mobiel.png

710 ms

tw_mobiel.png

tw_mobiel.png

726 ms

fb_mobiel.png

fb_mobiel.png

751 ms

nieuwsbrief-mobiel.png

nieuwsbrief-mobiel.png

774 ms

footer_2.gif

footer_2.gif

786 ms

ca-pub-2524396970733453.js

ca-pub-2524396970733453.js

125 ms

zrt_lookup.html

zrt_lookup.html

169 ms

show_ads_impl.js

show_ads_impl.js

113 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

89 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

108 ms

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

234 ms

bg_zoekvakbeneden.png

bg_zoekvakbeneden.png

765 ms

sh.7c7179124ea24ac6ba46caac.html

sh.7c7179124ea24ac6ba46caac.html

74 ms

__utm.gif

__utm.gif

75 ms

shares.json

shares.json

67 ms

layers.648fb6c882fbeb98be27.js

layers.648fb6c882fbeb98be27.js

29 ms

nieuwsbrief-button.png

nieuwsbrief-button.png

700 ms

pla

pla

79 ms

design.jpg

design.jpg

579 ms

boeken.png

boeken.png

593 ms

gerelateerd_onderzoek.png

gerelateerd_onderzoek.png

605 ms

pixel

pixel

24 ms

pixel

pixel

18 ms

Accessibility Review

wij-leren.nl accessibility score

76

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

wij-leren.nl best practices score

58

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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

wij-leren.nl SEO score

84

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

    N/A

  • Encoding

    ISO-8859-1

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

wij-leren.nl

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