Tools & Wizards About Us
beroepsziekten.nl screenshot

Report Summary

  • 13

    Performance

    Renders faster than
    25% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

beroepsziekten.nl

Beroepsziekten.nl | Nederlands Centrum voor Beroepsziekten

Page Load Speed

3.6 sec in total

First Response

293 ms

Resources Loaded

3 sec

Page Rendered

329 ms

beroepsziekten.nl screenshot

About Website

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

Het Nederlands Centrum voor Beroepsziekten (NCvB), registreert en signaleert beroepsziekten via het nationale melding- en registratiesysteem en meerdere specifieke peilstations.

Visit beroepsziekten.nl

Key Findings

We analyzed Beroepsziekten.nl page load time and found that the first response time was 293 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

beroepsziekten.nl performance score

13

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value18.3 s

0/100

25%

SI (Speed Index)

Value15.9 s

0/100

10%

TBT (Total Blocking Time)

Value1,100 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.335

34/100

15%

TTI (Time to Interactive)

Value17.4 s

4/100

10%

Network Requests Diagram

beroepsziekten.nl

293 ms

www.beroepsziekten.nl

694 ms

js

58 ms

font.css

272 ms

font.css

334 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that 83% of them (49 requests) were addressed to the original Beroepsziekten.nl, 5% (3 requests) were made to Googletagmanager.com and 5% (3 requests) were made to Static.addtoany.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Beroepsziekten.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 229.8 kB (9%)

Content Size

2.6 MB

After Optimization

2.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Beroepsziekten.nl main page is 2.6 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. 60% of websites need less resources to load. Images take 2.1 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 71.9 kB

  • Original 87.5 kB
  • After minification 73.3 kB
  • After compression 15.6 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 14.1 kB, which is 16% 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 71.9 kB or 82% of the original size.

Image Optimization

-8%

Potential reduce by 157.1 kB

  • Original 2.1 MB
  • After minification 1.9 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. Beroepsziekten images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 296 B

  • Original 309.3 kB
  • After minification 309.3 kB
  • After compression 309.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 490 B

  • Original 111.4 kB
  • After minification 111.3 kB
  • After compression 110.9 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. Beroepsziekten.nl has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 20 (41%)

Requests Now

49

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 49 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Beroepsziekten. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

beroepsziekten.nl

beroepsziekten.nl

293 ms

www.beroepsziekten.nl

www.beroepsziekten.nl

694 ms

js

js

58 ms

font.css

font.css

272 ms

font.css

font.css

334 ms

font.css

font.css

337 ms

font.css

font.css

336 ms

css_P8AIonsi4ak40IvFqgtphZfH53WOOZNP1JyHxHiEWFQ.css

css_P8AIonsi4ak40IvFqgtphZfH53WOOZNP1JyHxHiEWFQ.css

335 ms

css

css

41 ms

css_HXkZ0LaO4yOcwI9qQTaA-miHnADSPE9Rc-dI82TEEzU.css

css_HXkZ0LaO4yOcwI9qQTaA-miHnADSPE9Rc-dI82TEEzU.css

610 ms

js_U-7HOcC_jnFSE_Z-4z5YbKh_AHLwvEG6TLV5vWw0Mfc.js

js_U-7HOcC_jnFSE_Z-4z5YbKh_AHLwvEG6TLV5vWw0Mfc.js

543 ms

custom.css

custom.css

423 ms

update.css

update.css

424 ms

js

js

40 ms

analytics.js

analytics.js

15 ms

js

js

77 ms

collect

collect

47 ms

js_rqt9-vKipL1H2njJn01wq3h60aa_Tl-jUuskuvd4TDo.js

js_rqt9-vKipL1H2njJn01wq3h60aa_Tl-jUuskuvd4TDo.js

189 ms

page.js

page.js

36 ms

js_B3Gi9AQj7j6oefAHZHzAHNy3d3pwfsQr4H2j7QAr_8M.js

js_B3Gi9AQj7j6oefAHZHzAHNy3d3pwfsQr4H2j7QAr_8M.js

190 ms

accordion.frontend.min.js

accordion.frontend.min.js

275 ms

js_4d1FqV9qG9J_mfWvapt5-MWwRZMIQUPAXZ7F4u5ADv0.js

js_4d1FqV9qG9J_mfWvapt5-MWwRZMIQUPAXZ7F4u5ADv0.js

276 ms

index.umd.js

index.umd.js

39 ms

js_8MfcTxN9id85WEt0-b6NUtpLF8YS66VUe9Bop6p1uWY.js

js_8MfcTxN9id85WEt0-b6NUtpLF8YS66VUe9Bop6p1uWY.js

281 ms

arrow_bullet.png

arrow_bullet.png

128 ms

logo-amsterdamumc.svg

logo-amsterdamumc.svg

130 ms

slider1_1920x548.jpg

slider1_1920x548.jpg

554 ms

arrow-right-red.svg

arrow-right-red.svg

128 ms

white-500x200-ylestx.png

white-500x200-ylestx.png

127 ms

AnnetLenderink_kaart.jpg

AnnetLenderink_kaart.jpg

499 ms

schuren_lexes_0.jpg

schuren_lexes_0.jpg

230 ms

Parkinson-als-beroepsziekte.jpg

Parkinson-als-beroepsziekte.jpg

582 ms

Oratie-Henk-vander-molenjpg.jpg

Oratie-Henk-vander-molenjpg.jpg

404 ms

Heijermanslezing-08032024_750x520.jpg

Heijermanslezing-08032024_750x520.jpg

643 ms

OratieHenkvanderMolen-08032024_750x520.jpg

OratieHenkvanderMolen-08032024_750x520.jpg

316 ms

beroepsziekten_melden.jpg

beroepsziekten_melden.jpg

408 ms

diagnose.png

diagnose.png

495 ms

relatie-met-werk.png

relatie-met-werk.png

499 ms

blootstelling.png

blootstelling.png

585 ms

andere-verklaringen.png

andere-verklaringen.png

590 ms

melden.png

melden.png

589 ms

preventie.png

preventie.png

644 ms

richtlijns-032.svg

richtlijns-032.svg

672 ms

cijfers-032.svg

cijfers-032.svg

676 ms

scholing-033.svg

scholing-033.svg

679 ms

new_blinking.gif

new_blinking.gif

680 ms

nieuwsbrief_ncvb.jpg

nieuwsbrief_ncvb.jpg

734 ms

arrow-right-white.svg

arrow-right-white.svg

680 ms

arrow-right-black-60x60.png

arrow-right-black-60x60.png

705 ms

font.woff

font.woff

711 ms

font.woff

font.woff

752 ms

font.woff

font.woff

752 ms

font.woff

font.woff

807 ms

fa-solid-900.woff

fa-solid-900.woff

808 ms

fa-regular-400.woff

fa-regular-400.woff

808 ms

icon.ttf

icon.ttf

1075 ms

fa-brands-400.woff

fa-brands-400.woff

777 ms

sm.25.html

sm.25.html

54 ms

eso.BRQnzO8v.js

eso.BRQnzO8v.js

100 ms

Accessibility Review

beroepsziekten.nl accessibility score

93

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

beroepsziekten.nl best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

beroepsziekten.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

    NL

  • Encoding

    UTF-8

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

beroepsziekten.nl

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