Report Summary

  • 56

    Performance

    Renders faster than
    73% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

onderdelinden.nu

Welkom bij Onder de Linden - De website van onderdelinden!

Page Load Speed

3.7 sec in total

First Response

566 ms

Resources Loaded

2.6 sec

Page Rendered

530 ms

onderdelinden.nu screenshot

About Website

Welcome to onderdelinden.nu homepage info - get ready to check Onder De Linden best content right away, or after learning these important things about onderdelinden.nu

Visit onderdelinden.nu

Key Findings

We analyzed Onderdelinden.nu page load time and found that the first response time was 566 ms and then it took 3.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

onderdelinden.nu performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

33/100

10%

LCP (Largest Contentful Paint)

Value7.8 s

3/100

25%

SI (Speed Index)

Value5.5 s

55/100

10%

TBT (Total Blocking Time)

Value230 ms

87/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value7.0 s

53/100

10%

Network Requests Diagram

onderdelinden.nu

566 ms

odl

509 ms

293 ms

mediaboxAdvBlack21.css

89 ms

modal.css

185 ms

Our browser made a total of 31 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Onderdelinden.nu, 97% (30 requests) were made to Onderdelinden.ethdesign.nl. The less responsive or slowest element that took the longest time to load (909 ms) relates to the external source Onderdelinden.ethdesign.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 545.1 kB (32%)

Content Size

1.7 MB

After Optimization

1.2 MB

In fact, the total size of Onderdelinden.nu main page is 1.7 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. 35% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-93%

Potential reduce by 8.5 kB

  • Original 9.1 kB
  • After minification 2.3 kB
  • After compression 606 B

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 6.8 kB, which is 75% 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 8.5 kB or 93% of the original size.

Image Optimization

-7%

Potential reduce by 71.9 kB

  • Original 1.1 MB
  • After minification 1.0 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. Onder De Linden images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 395.0 kB

  • Original 546.3 kB
  • After minification 496.9 kB
  • After compression 151.4 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 395.0 kB or 72% of the original size.

CSS Optimization

-86%

Potential reduce by 69.6 kB

  • Original 81.4 kB
  • After minification 66.1 kB
  • After compression 11.8 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. Onderdelinden.nu needs all CSS files to be minified and compressed as it can save up to 69.6 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 17 (59%)

Requests Now

29

After Optimization

12

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Onder De Linden. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

onderdelinden.nu accessibility score

94

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.

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

onderdelinden.nu 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

Page has valid source maps

SEO Factors

onderdelinden.nu SEO score

93

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

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Onderdelinden.nu 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 Onderdelinden.nu main page’s claimed encoding is . 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 description is not detected on the main page of Onder De Linden. 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: