Tools & Wizards About Us
don.nl screenshot

Report Summary

  • 54

    Performance

    Renders faster than
    71% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

don.nl

Wij gaan maar voor één ding: volledige genezing van diabetes type 1. | Stichting DON

Page Load Speed

2.1 sec in total

First Response

301 ms

Resources Loaded

1.6 sec

Page Rendered

198 ms

don.nl screenshot

About Website

Welcome to don.nl homepage info - get ready to check DON best content right away, or after learning these important things about don.nl

Diabetes type 1 genezen, dat is het doel. Daarom steunt DON fundamenteel onderzoek naar genezing van diabetes type 1. Steun DON, stop diabetes type 1.

Visit don.nl

Key Findings

We analyzed Don.nl page load time and found that the first response time was 301 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

don.nl performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

24/100

10%

LCP (Largest Contentful Paint)

Value12.8 s

0/100

25%

SI (Speed Index)

Value7.1 s

31/100

10%

TBT (Total Blocking Time)

Value210 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0.033

100/100

15%

TTI (Time to Interactive)

Value5.5 s

71/100

10%

Network Requests Diagram

don.nl

301 ms

styles.css

95 ms

maps

31 ms

scripts.js

185 ms

contact.png

102 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 97% of them (33 requests) were addressed to the original Don.nl, 3% (1 request) were made to Maps.google.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Don.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 54.8 kB (7%)

Content Size

834.0 kB

After Optimization

779.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Don.nl main page is 834.0 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Images take 810.8 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 7.7 kB

  • Original 10.9 kB
  • After minification 10.8 kB
  • After compression 3.1 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 7.7 kB or 71% of the original size.

Image Optimization

-5%

Potential reduce by 37.4 kB

  • Original 810.8 kB
  • After minification 773.5 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. DON images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 2.9 kB

  • Original 3.8 kB
  • After minification 3.5 kB
  • After compression 935 B

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 2.9 kB or 76% of the original size.

CSS Optimization

-81%

Potential reduce by 6.8 kB

  • Original 8.4 kB
  • After minification 6.9 kB
  • After compression 1.6 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. Don.nl needs all CSS files to be minified and compressed as it can save up to 6.8 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (24%)

Requests Now

33

After Optimization

25

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of DON. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

don.nl

don.nl

301 ms

styles.css

styles.css

95 ms

maps

maps

31 ms

scripts.js

scripts.js

185 ms

contact.png

contact.png

102 ms

logo.png

logo.png

100 ms

homeA.png

homeA.png

178 ms

watwebieden.png

watwebieden.png

178 ms

wiewezijn.png

wiewezijn.png

194 ms

blob.php

blob.php

285 ms

blob.php

blob.php

298 ms

blob.php

blob.php

393 ms

blob.php

blob.php

518 ms

beeldbg.png

beeldbg.png

259 ms

nieuws.png

nieuws.png

282 ms

nieuws.png

nieuws.png

344 ms

leesmeer.png

leesmeer.png

372 ms

verbergen.png

verbergen.png

374 ms

actie.png

actie.png

389 ms

tripolis-superactie-cover(2).jpg

tripolis-superactie-cover(2).jpg

595 ms

DON1402%2007%20kerstkaart%20algemeen-def.jpg

DON1402%2007%20kerstkaart%20algemeen-def.jpg

1113 ms

blob.php

blob.php

467 ms

blob.php

blob.php

485 ms

onzemerken.png

onzemerken.png

480 ms

blob.php

blob.php

563 ms

blob.php

blob.php

575 ms

blob.php

blob.php

591 ms

blob.php

blob.php

604 ms

blob.php

blob.php

660 ms

blob.php

blob.php

672 ms

blob.php

blob.php

698 ms

blob.php

blob.php

791 ms

blob.php

blob.php

711 ms

footer2016.png

footer2016.png

752 ms

Accessibility Review

don.nl accessibility score

83

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA input fields do not have accessible names

High

ARIA IDs are not unique

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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

don.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

High

Page has valid source maps

SEO Factors

don.nl SEO score

100

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

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 Don.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 Don.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

don.nl

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