Tools & Wizards About Us
sioo.nl screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% 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

  • 91

    SEO

    Google-friendlier than
    70% of websites

sioo.nl

Sioo Opleidingen in organisatie- en veranderkunde op maat

Page Load Speed

3.8 sec in total

First Response

268 ms

Resources Loaded

3.3 sec

Page Rendered

230 ms

sioo.nl screenshot

About Website

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

Sioo verandert u en uw organisatie met opleidingen en maatwerktrajecten over verandermanagement, organisatiekunde en leiderschap bij veranderingen.

Visit sioo.nl

Key Findings

We analyzed Sioo.nl page load time and found that the first response time was 268 ms and then it took 3.5 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

sioo.nl performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

9/100

10%

LCP (Largest Contentful Paint)

Value10.2 s

0/100

25%

SI (Speed Index)

Value13.5 s

2/100

10%

TBT (Total Blocking Time)

Value2,540 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.007

100/100

15%

TTI (Time to Interactive)

Value17.5 s

4/100

10%

Network Requests Diagram

sioo.nl

268 ms

1928-Home.html

257 ms

reset.css

190 ms

grid.css

219 ms

style_pagestyle2.css

377 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that 68% of them (46 requests) were addressed to the original Sioo.nl, 12% (8 requests) were made to Static.olark.com and 6% (4 requests) were made to . The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Sioo.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 300.9 kB (16%)

Content Size

1.8 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sioo.nl main page is 1.8 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. 50% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 27.3 kB

  • Original 36.4 kB
  • After minification 32.0 kB
  • After compression 9.1 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. This page needs HTML code to be minified as it can gain 4.3 kB, which is 12% 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 27.3 kB or 75% of the original size.

Image Optimization

-1%

Potential reduce by 10.8 kB

  • Original 1.4 MB
  • After minification 1.4 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. Sioo images are well optimized though.

JavaScript Optimization

-62%

Potential reduce by 177.7 kB

  • Original 286.7 kB
  • After minification 238.5 kB
  • After compression 109.0 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 177.7 kB or 62% of the original size.

CSS Optimization

-84%

Potential reduce by 85.2 kB

  • Original 101.7 kB
  • After minification 78.2 kB
  • After compression 16.5 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. Sioo.nl needs all CSS files to be minified and compressed as it can save up to 85.2 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 30 (51%)

Requests Now

59

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sioo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sioo.nl

sioo.nl

268 ms

1928-Home.html

1928-Home.html

257 ms

reset.css

reset.css

190 ms

grid.css

grid.css

219 ms

style_pagestyle2.css

style_pagestyle2.css

377 ms

jquery.datepick.css

jquery.datepick.css

232 ms

jquery.fancybox-1.3.1.css

jquery.fancybox-1.3.1.css

244 ms

owl.carousel.css

owl.carousel.css

271 ms

owl.theme.css

owl.theme.css

289 ms

zde6qwc.js

zde6qwc.js

133 ms

jquery-1.9.1.min.js

jquery-1.9.1.min.js

507 ms

jquery-migrate-1.2.1.js

jquery-migrate-1.2.1.js

339 ms

jquery.tools.min.js

jquery.tools.min.js

263 ms

common.js

common.js

286 ms

common.js

common.js

338 ms

jquery.datepick.pack.js

jquery.datepick.pack.js

453 ms

jquery.datepick-nl.js

jquery.datepick-nl.js

387 ms

jquery.tooltip.pack.js

jquery.tooltip.pack.js

401 ms

jquery.easing-1.3.pack.js

jquery.easing-1.3.pack.js

414 ms

jquery.mousewheel-3.0.2.pack.js

jquery.mousewheel-3.0.2.pack.js

435 ms

jquery.fancybox-1.3.1.pack.js

jquery.fancybox-1.3.1.pack.js

493 ms

owl.carousel.js

owl.carousel.js

519 ms

ga-settings.js

ga-settings.js

521 ms

conversion.js

conversion.js

18 ms

logo.png

logo.png

238 ms

magnify-glass.png

magnify-glass.png

308 ms

Sioo_headers_USP.jpg

Sioo_headers_USP.jpg

1821 ms

Sioo_headers_Bouwenaanmaatwerk.jpg

Sioo_headers_Bouwenaanmaatwerk.jpg

1821 ms

Sioo_headers_Organisatieontwikkeling.jpg

Sioo_headers_Organisatieontwikkeling.jpg

1360 ms

Sioo_headers_MissionStatement.jpg

Sioo_headers_MissionStatement.jpg

1472 ms

home-block-arrow.png

home-block-arrow.png

333 ms

home-block-arrow-01.png

home-block-arrow-01.png

356 ms

home-block-arrow-02.png

home-block-arrow-02.png

435 ms

usp-arrow-01.png

usp-arrow-01.png

457 ms

icon-phone.png

icon-phone.png

537 ms

icon-document.png

icon-document.png

559 ms

home-block-arrow-03.png

home-block-arrow-03.png

637 ms

sioo-home-byoa.jpg

sioo-home-byoa.jpg

1108 ms

banner_face-to-facevrijdag.jpg

banner_face-to-facevrijdag.jpg

741 ms

AjaxLoader.gif

AjaxLoader.gif

843 ms

home-block-arrow-04.png

home-block-arrow-04.png

923 ms

DINWeb-Medium.woff

DINWeb-Medium.woff

1110 ms

DINWeb.woff

DINWeb.woff

1362 ms

a

a

111 ms

p.gif

p.gif

57 ms

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQ==

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQ==

10 ms

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQ==

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQ==

9 ms

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQ==

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQ==

7 ms

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQB+AIIAsgB2AGsAegBBAAgAZwBwAG8AbgByAM4ABgH4AAAACQD3AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAIAAwAEAAUABgAHAGYACQAKAAsADAANAA4ADwAQABEAEgATABQAFQAWABcAGAAZABoAGwAcAB0AHgAfACAAIQAiACMAJAAlACYAJwAoACkAKgArACwALQAuAC8AMAAxADIAMwA0ADUANgA3ADgAOQA6ADsAPAA9AD4APwBAAHQAQgBDAEQARQBGAEcASABJAEoASwBMAE0ATgBPAFAAUQBSAFMAVABVAFYAVwBYAFkAWgBbAFwAXQBeAF8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA0ABgAGEAYgBlAGMAjgBkAHgAlwB8AGgAhQDPAJMAdwCPAIoAkgCWAHUAhgBtAGwAeQCEAH8AcQCMAIkAkQBzAJsAmACZAJ0AmgCcAHsAngCiAJ8AoAChAKYAowCkAKUAiACnAKsAqACpAKwAqgCVAH0AsACtAK4ArwCxAIsAgwC2ALMAtAC4ALUAtwCAALkAvQC6ALsAvADBAL4AvwDAAJQAwgDGAMMAxADHAMUAjQCBAMsAyADJAMoAzACQAM0=

AMAAlADCAMYAwwDEAMcAxQCNAIEAywDIAMkAygDMAJAAzQB+AIIAsgB2AGsAegBBAAgAZwBwAG8AbgByAM4ABgH4AAAACQD3AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABAAIAAwAEAAUABgAHAGYACQAKAAsADAANAA4ADwAQABEAEgATABQAFQAWABcAGAAZABoAGwAcAB0AHgAfACAAIQAiACMAJAAlACYAJwAoACkAKgArACwALQAuAC8AMAAxADIAMwA0ADUANgA3ADgAOQA6ADsAPAA9AD4APwBAAHQAQgBDAEQARQBGAEcASABJAEoASwBMAE0ATgBPAFAAUQBSAFMAVABVAFYAVwBYAFkAWgBbAFwAXQBeAF8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA0ABgAGEAYgBlAGMAjgBkAHgAlwB8AGgAhQDPAJMAdwCPAIoAkgCWAHUAhgBtAGwAeQCEAH8AcQCMAIkAkQBzAJsAmACZAJ0AmgCcAHsAngCiAJ8AoAChAKYAowCkAKUAiACnAKsAqACpAKwAqgCVAH0AsACtAK4ArwCxAIsAgwC2ALMAtAC4ALUAtwCAALkAvQC6ALsAvADBAL4AvwDAAJQAwgDGAMMAxADHAMUAjQCBAMsAyADJAMoAzACQAM0=

7 ms

ga.js

ga.js

8 ms

87 ms

loader0.js

loader0.js

100 ms

Twitter

Twitter

1289 ms

__utm.gif

__utm.gif

15 ms

bg_tooltip.png

bg_tooltip.png

1166 ms

home-carousel-mask.png

home-carousel-mask.png

1182 ms

home-block-arrow-05.png

home-block-arrow-05.png

1252 ms

48 ms

1132-520-10-7809.js

1132-520-10-7809.js

134 ms

c

c

92 ms

application2.js

application2.js

150 ms

storage.html

storage.html

116 ms

storage.js

storage.js

28 ms

visits

visits

168 ms

jquery.js

jquery.js

67 ms

d7f830dcd868af2497d51bf3ba699a8f.css

d7f830dcd868af2497d51bf3ba699a8f.css

44 ms

buttons-light.png

buttons-light.png

30 ms

print.css

print.css

103 ms

Accessibility Review

sioo.nl accessibility score

83

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

sioo.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

SEO Factors

sioo.nl SEO score

91

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

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 Sioo.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 Sioo.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

sioo.nl

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