Tools & Wizards About Us

Report Summary

  • 8

    Performance

    Renders faster than
    22% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

vandenbergisolatie.nl

Waarom van den berg Isolatie? - Van den Berg Isolatie

Page Load Speed

7.4 sec in total

First Response

537 ms

Resources Loaded

6.5 sec

Page Rendered

418 ms

About Website

Welcome to vandenbergisolatie.nl homepage info - get ready to check Van Den Berg Isolatie best content right away, or after learning these important things about vandenbergisolatie.nl

• Door ervaren mensen • Wij werken met kwaliteit producten Wilt u ook jaarlijks honderden euro’s besparen op uw woonlasten? Laat uw woning...

Visit vandenbergisolatie.nl

Key Findings

We analyzed Vandenbergisolatie.nl page load time and found that the first response time was 537 ms and then it took 6.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

vandenbergisolatie.nl performance score

8

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.2 s

8/100

10%

LCP (Largest Contentful Paint)

Value28.4 s

0/100

25%

SI (Speed Index)

Value20.1 s

0/100

10%

TBT (Total Blocking Time)

Value1,780 ms

10/100

30%

CLS (Cumulative Layout Shift)

Value0.382

27/100

15%

TTI (Time to Interactive)

Value26.3 s

0/100

10%

Network Requests Diagram

vandenbergisolatie.nl

537 ms

www.vandenbergisolatie.nl

532 ms

www.vandenbergisolatie.nl

451 ms

css2

32 ms

jquery.min.js

19 ms

Our browser made a total of 123 requests to load all elements on the main page. We found that 80% of them (99 requests) were addressed to the original Vandenbergisolatie.nl, 7% (8 requests) were made to Youtube.com and 6% (7 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (2.1 sec) belongs to the original domain Vandenbergisolatie.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 90.2 kB (2%)

Content Size

4.8 MB

After Optimization

4.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vandenbergisolatie.nl main page is 4.8 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 4.3 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 76.0 kB

  • Original 93.1 kB
  • After minification 90.2 kB
  • After compression 17.0 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 76.0 kB or 82% of the original size.

Image Optimization

-0%

Potential reduce by 3.2 kB

  • Original 4.3 MB
  • After minification 4.3 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. Van Den Berg Isolatie images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 6.7 kB

  • Original 327.0 kB
  • After minification 327.0 kB
  • After compression 320.3 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

-3%

Potential reduce by 4.3 kB

  • Original 136.2 kB
  • After minification 136.2 kB
  • After compression 131.9 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. Vandenbergisolatie.nl has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 39 (36%)

Requests Now

109

After Optimization

70

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 109 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Van Den Berg Isolatie. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

vandenbergisolatie.nl accessibility score

63

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

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.

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

vandenbergisolatie.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

High

Missing source maps for large first-party JavaScript

SEO Factors

vandenbergisolatie.nl SEO score

83

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

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

    ISO-8859-1

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

Open Graph data is detected on the main page of Van Den Berg Isolatie. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: