Tools & Wizards About Us
occupationaldiseases.nl screenshot

Report Summary

  • 61

    Performance

    Renders faster than
    76% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

occupationaldiseases.nl

Occupationaldiseases.nl | Netherlands Center for Occupational Diseases

Page Load Speed

2.4 sec in total

First Response

231 ms

Resources Loaded

2 sec

Page Rendered

180 ms

occupationaldiseases.nl screenshot

About Website

Visit occupationaldiseases.nl now to see the best up-to-date Occupationaldiseases content and also check out these interesting facts you probably never knew about occupationaldiseases.nl

The Netherlands Center for Occupational Diseases (NCvB) registers and reports occupational diseases via the national notification and registration system and a number of specific surveillance projects...

Visit occupationaldiseases.nl

Key Findings

We analyzed Occupationaldiseases.nl page load time and found that the first response time was 231 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

occupationaldiseases.nl performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value5.3 s

21/100

25%

SI (Speed Index)

Value5.0 s

64/100

10%

TBT (Total Blocking Time)

Value250 ms

84/100

30%

CLS (Cumulative Layout Shift)

Value0.025

100/100

15%

TTI (Time to Interactive)

Value6.3 s

61/100

10%

Network Requests Diagram

occupationaldiseases.nl

231 ms

www.occupationaldiseases.nl

539 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

94 ms

css_vZ_wrMQ9Og-YPPxa1q4us3N7DsZMJa-14jShHgRoRNo.css

187 ms

css_8_QKQjo6I581bcQ12ZUCISW0l2jx1UMxP2MwerCfG4w.css

271 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 61% of them (19 requests) were addressed to the original Occupationaldiseases.nl, 26% (8 requests) were made to Beroepsziekten.nl and 6% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (697 ms) relates to the external source Beroepsziekten.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 126.7 kB (12%)

Content Size

1.1 MB

After Optimization

959.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Occupationaldiseases.nl main page is 1.1 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. 25% of websites need less resources to load. Images take 971.0 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 30.2 kB

  • Original 38.2 kB
  • After minification 35.3 kB
  • After compression 8.0 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 30.2 kB or 79% of the original size.

Image Optimization

-8%

Potential reduce by 77.2 kB

  • Original 971.0 kB
  • After minification 893.8 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. Occupationaldiseases images are well optimized though.

JavaScript Optimization

-30%

Potential reduce by 19.1 kB

  • Original 64.6 kB
  • After minification 64.6 kB
  • After compression 45.5 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 19.1 kB or 30% of the original size.

CSS Optimization

-2%

Potential reduce by 227 B

  • Original 12.2 kB
  • After minification 12.2 kB
  • After compression 12.0 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. Occupationaldiseases.nl has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (33%)

Requests Now

27

After Optimization

18

  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Occupationaldiseases. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

occupationaldiseases.nl

occupationaldiseases.nl

231 ms

www.occupationaldiseases.nl

www.occupationaldiseases.nl

539 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

94 ms

css_vZ_wrMQ9Og-YPPxa1q4us3N7DsZMJa-14jShHgRoRNo.css

css_vZ_wrMQ9Og-YPPxa1q4us3N7DsZMJa-14jShHgRoRNo.css

187 ms

css_8_QKQjo6I581bcQ12ZUCISW0l2jx1UMxP2MwerCfG4w.css

css_8_QKQjo6I581bcQ12ZUCISW0l2jx1UMxP2MwerCfG4w.css

271 ms

css_uUFeAqlj8FMnJJBuIlhiokHj5rfdhRi28BR1xqUk2mM.css

css_uUFeAqlj8FMnJJBuIlhiokHj5rfdhRi28BR1xqUk2mM.css

276 ms

css_qbkYHNHMRsF5fEBJvyT5ytz31VC6PEYexavMxDoCuyI.css

css_qbkYHNHMRsF5fEBJvyT5ytz31VC6PEYexavMxDoCuyI.css

280 ms

js_YD9ro0PAqY25gGWrTki6TjRUG8TdokmmxjfqpNNfzVU.js

js_YD9ro0PAqY25gGWrTki6TjRUG8TdokmmxjfqpNNfzVU.js

379 ms

js_UxbptggT3ar9knZHDJRB4jwFfDNLA1d_bdJ9MKdTZUI.js

js_UxbptggT3ar9knZHDJRB4jwFfDNLA1d_bdJ9MKdTZUI.js

287 ms

js_R9UbiVw2xuTUI0GZoaqMDOdX0lrZtgX-ono8RVOUEVc.js

js_R9UbiVw2xuTUI0GZoaqMDOdX0lrZtgX-ono8RVOUEVc.js

289 ms

js_zQ80zNCAEyIfY_YDmOn_YRRYlacOYRgHTR-Dy7YXdoc.js

js_zQ80zNCAEyIfY_YDmOn_YRRYlacOYRgHTR-Dy7YXdoc.js

450 ms

js

js

54 ms

css

css

29 ms

bnr-ncvb-eng.png

bnr-ncvb-eng.png

455 ms

read-more.png

read-more.png

423 ms

brandweerman-01.jpg

brandweerman-01.jpg

524 ms

control-04.jpg

control-04.jpg

521 ms

arbozorg.jpg

arbozorg.jpg

529 ms

nb-jun2013-01.jpg

nb-jun2013-01.jpg

529 ms

who-ilo.jpg

who-ilo.jpg

582 ms

bmj-occupationalmedicine.jpg

bmj-occupationalmedicine.jpg

697 ms

pijltje.gif

pijltje.gif

94 ms

search.png

search.png

97 ms

nl-flag.png

nl-flag.png

98 ms

arrow_bullet.png

arrow_bullet.png

91 ms

indvid-wor-practice.png

indvid-wor-practice.png

641 ms

cll-banner.png

cll-banner.png

282 ms

illustratie-knee.jpg

illustratie-knee.jpg

455 ms

first-aid-case.jpg

first-aid-case.jpg

468 ms

jizfRExUiTo99u79B_mh0O6tKw.woff

jizfRExUiTo99u79B_mh0O6tKw.woff

21 ms

jizaRExUiTo99u79D0KEww.woff

jizaRExUiTo99u79D0KEww.woff

29 ms

Accessibility Review

occupationaldiseases.nl accessibility score

88

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.

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

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

occupationaldiseases.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

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

occupationaldiseases.nl SEO score

79

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Occupationaldiseases.nl can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Occupationaldiseases.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

occupationaldiseases.nl

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