Tools & Wizards About Us
congrescentrum.nl screenshot

Report Summary

  • 65

    Performance

    Renders faster than
    78% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 87

    SEO

    Google-friendlier than
    65% of websites

congrescentrum.nl

Congrescentrum.nl - Vind uw congrescentrum in Nederland!

Page Load Speed

2.9 sec in total

First Response

378 ms

Resources Loaded

2.1 sec

Page Rendered

387 ms

congrescentrum.nl screenshot

About Website

Click here to check amazing Congrescentrum content. Otherwise, check out these important facts you probably never knew about congrescentrum.nl

Congrescentrum.nl helpt u bij het vinden van originele congrescentra. Vraag gratis informatie aan over elke congrescentrum!

Visit congrescentrum.nl

Key Findings

We analyzed Congrescentrum.nl page load time and found that the first response time was 378 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

congrescentrum.nl performance score

65

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

46/100

25%

SI (Speed Index)

Value5.8 s

50/100

10%

TBT (Total Blocking Time)

Value220 ms

87/100

30%

CLS (Cumulative Layout Shift)

Value0.062

97/100

15%

TTI (Time to Interactive)

Value7.0 s

52/100

10%

Network Requests Diagram

congrescentrum.nl

378 ms

www.congrescentrum.nl

286 ms

www.congrescentrum.nl

409 ms

bootstrap.min.css

98 ms

font-awesome.min.css

191 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 81% of them (34 requests) were addressed to the original Congrescentrum.nl, 10% (4 requests) were made to Img.crio.nl and 7% (3 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (677 ms) belongs to the original domain Congrescentrum.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 284.6 kB (22%)

Content Size

1.3 MB

After Optimization

989.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Congrescentrum.nl main page is 1.3 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 715.4 kB which makes up the majority of the site volume.

HTML Optimization

-91%

Potential reduce by 60.4 kB

  • Original 66.3 kB
  • After minification 29.8 kB
  • After compression 5.9 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 36.5 kB, which is 55% 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 60.4 kB or 91% of the original size.

Image Optimization

-0%

Potential reduce by 1.2 kB

  • Original 715.4 kB
  • After minification 714.2 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. Congrescentrum images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 1.0 kB

  • Original 192.7 kB
  • After minification 192.7 kB
  • After compression 191.6 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. This website has mostly compressed JavaScripts.

CSS Optimization

-74%

Potential reduce by 221.9 kB

  • Original 300.1 kB
  • After minification 299.9 kB
  • After compression 78.2 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. Congrescentrum.nl needs all CSS files to be minified and compressed as it can save up to 221.9 kB or 74% of the original size.

Requests Breakdown

Number of requests can be reduced by 24 (71%)

Requests Now

34

After Optimization

10

  • Images
  • JavaScript
  • CSS

The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Congrescentrum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

congrescentrum.nl

congrescentrum.nl

378 ms

www.congrescentrum.nl

www.congrescentrum.nl

286 ms

www.congrescentrum.nl

www.congrescentrum.nl

409 ms

bootstrap.min.css

bootstrap.min.css

98 ms

font-awesome.min.css

font-awesome.min.css

191 ms

css

css

36 ms

animate.min.css

animate.min.css

279 ms

settings.min.css

settings.min.css

284 ms

style.min.css

style.min.css

282 ms

jquery.bxslider.min.css

jquery.bxslider.min.css

288 ms

flexslider.min.css

flexslider.min.css

282 ms

style.min.css

style.min.css

396 ms

custom.css

custom.css

369 ms

responsive.min.css

responsive.min.css

373 ms

20131118090642_M_4024.jpg

20131118090642_M_4024.jpg

131 ms

jquery-1.11.1.min.js

jquery-1.11.1.min.js

543 ms

jquery.noconflict.js

jquery.noconflict.js

370 ms

modernizr.2.7.1.min.js

modernizr.2.7.1.min.js

540 ms

jquery-migrate-1.2.1.min.js

jquery-migrate-1.2.1.min.js

541 ms

jquery.placeholder.js

jquery.placeholder.js

542 ms

jquery-ui.1.10.4.min.js

jquery-ui.1.10.4.min.js

677 ms

bootstrap.min.js

bootstrap.min.js

651 ms

jquery.themepunch.plugins.min.js

jquery.themepunch.plugins.min.js

675 ms

jquery.themepunch.revolution.min.js

jquery.themepunch.revolution.min.js

673 ms

jquery.flexslider-min.js

jquery.flexslider-min.js

671 ms

jquery.bxslider.min.js

jquery.bxslider.min.js

672 ms

jquery.stellar.min.js

jquery.stellar.min.js

673 ms

waypoints.min.js

waypoints.min.js

674 ms

theme-scripts.min.js

theme-scripts.min.js

675 ms

scripts.js

scripts.js

675 ms

20120227161939_M_8085.jpg

20120227161939_M_8085.jpg

142 ms

d68b77c8d223c63b9f27b1d98721901f_M_1647517812_15897_b.jpeg

d68b77c8d223c63b9f27b1d98721901f_M_1647517812_15897_b.jpeg

672 ms

20220413150422_M_17015.jpg

20220413150422_M_17015.jpg

151 ms

mobile-menu.png

mobile-menu.png

327 ms

vergaderen3.jpg

vergaderen3.jpg

564 ms

hover-effect.png

hover-effect.png

330 ms

global-map.jpg

global-map.jpg

581 ms

S6uyw4BMUTPHjx4wWw.ttf

S6uyw4BMUTPHjx4wWw.ttf

120 ms

S6u9w4BMUTPHh7USSwiPHA.ttf

S6u9w4BMUTPHh7USSwiPHA.ttf

120 ms

S6u9w4BMUTPHh6UVSwiPHA.ttf

S6u9w4BMUTPHh6UVSwiPHA.ttf

121 ms

soap-icons.woff

soap-icons.woff

122 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

122 ms

Accessibility Review

congrescentrum.nl accessibility score

87

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

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

Best Practices

congrescentrum.nl best practices score

83

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

SEO Factors

congrescentrum.nl SEO score

87

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Congrescentrum.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 Congrescentrum.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

congrescentrum.nl

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