Tools & Wizards About Us
sibren.nl screenshot

Report Summary

  • 52

    Performance

    Renders faster than
    70% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 72% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

sibren.nl

Sibren Branding, marketing, webdesign graphic design | Sibren - #OvertuigSneller #ConvinceFaster

Page Load Speed

2.2 sec in total

First Response

380 ms

Resources Loaded

1.6 sec

Page Rendered

207 ms

sibren.nl screenshot

About Website

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

Marcom design bureau in Heemstede van Sibren van der Burgt. Met de juiste overtuigings strategie, marketing, branding, webdesign en visual design wordt je toegevoegde waarde zichtbaarder en kun je kla...

Visit sibren.nl

Key Findings

We analyzed Sibren.nl page load time and found that the first response time was 380 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

sibren.nl performance score

52

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

75/100

10%

LCP (Largest Contentful Paint)

Value6.1 s

12/100

25%

SI (Speed Index)

Value4.4 s

75/100

10%

TBT (Total Blocking Time)

Value490 ms

59/100

30%

CLS (Cumulative Layout Shift)

Value0.192

64/100

15%

TTI (Time to Interactive)

Value5.8 s

67/100

10%

Network Requests Diagram

sibren.nl

380 ms

simplemodal_disclaimer.css

93 ms

jquery.js

271 ms

modernizr.js

180 ms

placeholder.js

177 ms

Our browser made a total of 54 requests to load all elements on the main page. We found that 78% of them (42 requests) were addressed to the original Sibren.nl, 7% (4 requests) were made to Google-analytics.com and 6% (3 requests) were made to Static.addtoany.com. The less responsive or slowest element that took the longest time to load (862 ms) belongs to the original domain Sibren.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 520.0 kB (45%)

Content Size

1.2 MB

After Optimization

646.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sibren.nl main page is 1.2 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. 45% of websites need less resources to load. Javascripts take 612.1 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 69.2 kB

  • Original 85.7 kB
  • After minification 82.0 kB
  • After compression 16.5 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 69.2 kB or 81% of the original size.

Image Optimization

-4%

Potential reduce by 16.0 kB

  • Original 445.3 kB
  • After minification 429.3 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. Sibren images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 415.9 kB

  • Original 612.1 kB
  • After minification 582.5 kB
  • After compression 196.2 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 415.9 kB or 68% of the original size.

CSS Optimization

-82%

Potential reduce by 18.9 kB

  • Original 23.2 kB
  • After minification 18.0 kB
  • After compression 4.3 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. Sibren.nl needs all CSS files to be minified and compressed as it can save up to 18.9 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 29 (58%)

Requests Now

50

After Optimization

21

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 50 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sibren. 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 as a result speed up the page load time.

Network Requests Diagram

sibren.nl

sibren.nl

380 ms

simplemodal_disclaimer.css

simplemodal_disclaimer.css

93 ms

jquery.js

jquery.js

271 ms

modernizr.js

modernizr.js

180 ms

placeholder.js

placeholder.js

177 ms

jquery-placeholder.js

jquery-placeholder.js

313 ms

basis_test_home.css

basis_test_home.css

190 ms

anylinkcssmenu.css

anylinkcssmenu.css

173 ms

nl.js

nl.js

14 ms

page.js

page.js

21 ms

jquery.cookie.js

jquery.cookie.js

263 ms

jquery.min.js

jquery.min.js

7 ms

load_cont.js

load_cont.js

262 ms

jquery-latest.js

jquery-latest.js

10 ms

jquery.bxSlider.js

jquery.bxSlider.js

322 ms

anylinkcssmenu.js

anylinkcssmenu.js

323 ms

anylinkcssmenu2.js

anylinkcssmenu2.js

361 ms

statcounter.js

statcounter.js

361 ms

mootools-core-1.4.5_cookie.js

mootools-core-1.4.5_cookie.js

361 ms

cookie-notice.js

cookie-notice.js

361 ms

hovermenu.js

hovermenu.js

361 ms

cufon-yui.js

cufon-yui.js

361 ms

cufon.js

cufon.js

606 ms

cufon-ak.js

cufon-ak.js

703 ms

cufon-myr.js

cufon-myr.js

646 ms

counter_xhtml.js

counter_xhtml.js

12 ms

13-008-SOW-packshot_wit.jpg

13-008-SOW-packshot_wit.jpg

279 ms

bg-vertical.jpg

bg-vertical.jpg

166 ms

TAG-bg_home.jpg

TAG-bg_home.jpg

143 ms

logoSibren_01_SO.png

logoSibren_01_SO.png

144 ms

socialbuttons-top_regular.jpg

socialbuttons-top_regular.jpg

257 ms

002.jpg

002.jpg

508 ms

003.jpg

003.jpg

374 ms

004.jpg

004.jpg

515 ms

005.jpg

005.jpg

550 ms

001.jpg

001.jpg

515 ms

006.jpg

006.jpg

555 ms

Sibren-GoedeNaam-Oneliners_wortels_350px.jpg

Sibren-GoedeNaam-Oneliners_wortels_350px.jpg

570 ms

Nederland-ICT.png

Nederland-ICT.png

803 ms

banner-Inspiratie-sessie.gif

banner-Inspiratie-sessie.gif

712 ms

Social-Icons_LI.gif

Social-Icons_LI.gif

854 ms

new-g-plus-icon-16.png

new-g-plus-icon-16.png

703 ms

Social-Icons_Twitter.gif

Social-Icons_Twitter.gif

798 ms

Social-Icons_FB.gif

Social-Icons_FB.gif

799 ms

Social-Icons_rss.gif

Social-Icons_rss.gif

793 ms

share_save_120_16.jpg

share_save_120_16.jpg

801 ms

ga.js

ga.js

5 ms

none

none

857 ms

13-008-SOW-packshot.jpg

13-008-SOW-packshot.jpg

862 ms

__utm.gif

__utm.gif

19 ms

sm13.html

sm13.html

40 ms

ga.js

ga.js

21 ms

t.php

t.php

141 ms

__utm.gif

__utm.gif

70 ms

Accessibility Review

sibren.nl accessibility score

89

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

[id] attributes on active, focusable elements 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

Links do not have a discernible name

Best Practices

sibren.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

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

sibren.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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sibren.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it does not match the claimed English language. Our system also found out that Sibren.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

sibren.nl

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