Tools & Wizards About Us

Report Summary

  • 38

    Performance

    Renders faster than
    57% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

isover.nl

Isover Nederland | De duurzame keuze voor isolatiematerialen in Nederland

Page Load Speed

4.4 sec in total

First Response

638 ms

Resources Loaded

3.2 sec

Page Rendered

491 ms

About Website

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

Isoleren met ISOVER glaswol is duurzaam, eenvoudig en brandveilig. Haal de beste isolatieprestaties met ISOVER. Hoe u het beste isoleeert? U vindt het op ISOVER.nl. Isolatiematerialen

Visit isover.nl

Key Findings

We analyzed Isover.nl page load time and found that the first response time was 638 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

isover.nl performance score

38

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value3.7 s

58/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value890 ms

32/100

30%

CLS (Cumulative Layout Shift)

Value0.286

42/100

15%

TTI (Time to Interactive)

Value11.6 s

18/100

10%

Network Requests Diagram

www.isover.nl

638 ms

google_tag.script.js

45 ms

google_tag.script.js

25 ms

google_tag.script.js

388 ms

input-reset.css

387 ms

Our browser made a total of 208 requests to load all elements on the main page. We found that 96% of them (200 requests) were addressed to the original Isover.nl, 2% (5 requests) were made to Googletagmanager.com and 1% (3 requests) were made to Static.addtoany.com. The less responsive or slowest element that took the longest time to load (777 ms) belongs to the original domain Isover.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 125.3 kB (28%)

Content Size

453.9 kB

After Optimization

328.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Isover.nl main page is 453.9 kB. 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 258.1 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 109.1 kB

  • Original 125.8 kB
  • After minification 112.8 kB
  • After compression 16.7 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 109.1 kB or 87% of the original size.

Image Optimization

-12%

Potential reduce by 1.9 kB

  • Original 16.1 kB
  • After minification 14.2 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. Obviously, Isover needs image optimization as it can save up to 1.9 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-2%

Potential reduce by 6.2 kB

  • Original 258.1 kB
  • After minification 257.9 kB
  • After compression 251.9 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

-15%

Potential reduce by 8.1 kB

  • Original 53.9 kB
  • After minification 52.4 kB
  • After compression 45.8 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. Isover.nl needs all CSS files to be minified and compressed as it can save up to 8.1 kB or 15% of the original size.

Requests Breakdown

Number of requests can be reduced by 190 (94%)

Requests Now

203

After Optimization

13

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 203 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Isover. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 107 to 1 for JavaScripts and from 73 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

isover.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.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

isover.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

High

Page has valid source maps

SEO Factors

isover.nl SEO score

83

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

Links do not have descriptive text

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 Isover.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 Isover.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

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