Tools & Wizards About Us
johnvoulon.nl screenshot

Report Summary

  • 4

    Performance

    Renders faster than
    20% of other websites

  • 38

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

johnvoulon.nl

Het overzichtelijke accountantskantoor uit Schagen - Zuurbier Voulon Accountants

Page Load Speed

5.3 sec in total

First Response

513 ms

Resources Loaded

4.4 sec

Page Rendered

335 ms

johnvoulon.nl screenshot

About Website

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

Het overzichtelijke accountantskantoor uit Schagen, Zuurbier Voulon Wij implementeren, organiseren en adviseren voor bedrijven en particulieren Zuurbier Voulon Accountants is in Schagen al sinds 1977 ...

Visit johnvoulon.nl

Key Findings

We analyzed Johnvoulon.nl page load time and found that the first response time was 513 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

johnvoulon.nl performance score

4

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.3 s

1/100

25%

SI (Speed Index)

Value11.7 s

4/100

10%

TBT (Total Blocking Time)

Value2,980 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.693

7/100

15%

TTI (Time to Interactive)

Value12.3 s

15/100

10%

Network Requests Diagram

johnvoulon.nl

513 ms

www.zuurbiervoulon.nl

558 ms

het_overzichtelijke_accountantskantoor_uit_schagen.html

514 ms

site.js

339 ms

common.js

172 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Johnvoulon.nl, 59% (46 requests) were made to Zuurbiervoulon.nl and 14% (11 requests) were made to Maps.google.com. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Zuurbiervoulon.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 517.0 kB (18%)

Content Size

2.8 MB

After Optimization

2.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Johnvoulon.nl main page is 2.8 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. 55% of websites need less resources to load. Images take 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 49.2 kB

  • Original 62.3 kB
  • After minification 59.7 kB
  • After compression 13.1 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 49.2 kB or 79% of the original size.

Image Optimization

-5%

Potential reduce by 120.8 kB

  • Original 2.2 MB
  • After minification 2.1 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. John Voulon images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 338.9 kB

  • Original 519.8 kB
  • After minification 511.6 kB
  • After compression 180.8 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 338.9 kB or 65% of the original size.

CSS Optimization

-86%

Potential reduce by 8.2 kB

  • Original 9.6 kB
  • After minification 7.6 kB
  • After compression 1.4 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. Johnvoulon.nl needs all CSS files to be minified and compressed as it can save up to 8.2 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 38 (54%)

Requests Now

71

After Optimization

33

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 71 CSS, Javascripts, AJAX and image requests in order to completely render the main page of John Voulon. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

johnvoulon.nl

johnvoulon.nl

513 ms

www.zuurbiervoulon.nl

www.zuurbiervoulon.nl

558 ms

het_overzichtelijke_accountantskantoor_uit_schagen.html

het_overzichtelijke_accountantskantoor_uit_schagen.html

514 ms

site.js

site.js

339 ms

common.js

common.js

172 ms

validation-simple.js

validation-simple.js

177 ms

page.css

page.css

218 ms

common.css

common.css

182 ms

combined.css

combined.css

319 ms

jquery.fancybox-1.3.4.css

jquery.fancybox-1.3.4.css

257 ms

jquery.fancybox-1.3.4.js

jquery.fancybox-1.3.4.js

266 ms

layer_48727_ea9e4fd8b97a4bcd9c5321b170a68398.png

layer_48727_ea9e4fd8b97a4bcd9c5321b170a68398.png

790 ms

0.png

0.png

115 ms

1.png

1.png

127 ms

2.png

2.png

144 ms

3.png

3.png

133 ms

4.png

4.png

120 ms

5.png

5.png

209 ms

6.png

6.png

221 ms

7.png

7.png

220 ms

8.png

8.png

228 ms

9.png

9.png

247 ms

10.png

10.png

305 ms

11.png

11.png

376 ms

12.png

12.png

315 ms

13.png

13.png

324 ms

14.png

14.png

388 ms

16.png

16.png

392 ms

17.png

17.png

415 ms

18.png

18.png

423 ms

28_org.png

28_org.png

645 ms

31_org.png

31_org.png

676 ms

33_org.png

33_org.png

655 ms

32_org.png

32_org.png

697 ms

29_org.png

29_org.png

721 ms

30_org.png

30_org.png

832 ms

layer_48726_925b12b0774a46ba9c5a0075b5c2327a.png

layer_48726_925b12b0774a46ba9c5a0075b5c2327a.png

1901 ms

facebookLinkImage.png

facebookLinkImage.png

787 ms

twitterLinkImage.png

twitterLinkImage.png

809 ms

gs_loop_white.png

gs_loop_white.png

812 ms

gtm.js

gtm.js

61 ms

ga.js

ga.js

30 ms

za.js

za.js

844 ms

track

track

89 ms

js

js

29 ms

1_0.png

1_0.png

240 ms

2_0.png

2_0.png

128 ms

3_0.png

3_0.png

262 ms

4_0.png

4_0.png

129 ms

5_0.png

5_0.png

127 ms

common.js

common.js

5 ms

map.js

map.js

16 ms

util.js

util.js

15 ms

marker.js

marker.js

15 ms

StaticMapService.GetMapImage

StaticMapService.GetMapImage

52 ms

onion.js

onion.js

26 ms

openhand_8_8.cur

openhand_8_8.cur

41 ms

ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

27 ms

stats.js

stats.js

22 ms

controls.js

controls.js

19 ms

transparent.png

transparent.png

30 ms

css

css

51 ms

spotlight-poi.png

spotlight-poi.png

34 ms

google4.png

google4.png

23 ms

mapcnt6.png

mapcnt6.png

23 ms

sv5.png

sv5.png

24 ms

vt

vt

17 ms

vt

vt

13 ms

vt

vt

30 ms

tmapctrl.png

tmapctrl.png

20 ms

cb_scout5.png

cb_scout5.png

28 ms

tmapctrl4.png

tmapctrl4.png

20 ms

imgs8.png

imgs8.png

20 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

6 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

12 ms

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

15 ms

d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf

d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf

14 ms

AuthenticationService.Authenticate

AuthenticationService.Authenticate

276 ms

Accessibility Review

johnvoulon.nl accessibility score

38

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

Image elements do not have [alt] attributes

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>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

johnvoulon.nl best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

johnvoulon.nl SEO score

85

Search Engine Optimization Advices

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

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 Johnvoulon.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 Johnvoulon.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

johnvoulon.nl

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