Tools & Wizards About Us

Report Summary

  • 85

    Performance

    Renders faster than
    88% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

comeniusmuseum.nl

Comenius Museum

Page Load Speed

2.4 sec in total

First Response

555 ms

Resources Loaded

1.6 sec

Page Rendered

268 ms

About Website

Click here to check amazing Comenius Museum content. Otherwise, check out these important facts you probably never knew about comeniusmuseum.nl

Het Comenius Museum is gewijd aan het leven, het werk en de betekenis van de Tsjechische filosoof, theoloog en pedagoog Jan Amos Comenius (1592-1670). Het museum geeft tevens toegang tot het graf van ...

Visit comeniusmuseum.nl

Key Findings

We analyzed Comeniusmuseum.nl page load time and found that the first response time was 555 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

comeniusmuseum.nl performance score

85

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

66/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

89/100

25%

SI (Speed Index)

Value3.9 s

82/100

10%

TBT (Total Blocking Time)

Value220 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0.077

95/100

15%

TTI (Time to Interactive)

Value5.4 s

72/100

10%

Network Requests Diagram

comeniusmuseum.nl

555 ms

com_stijl.css

98 ms

table.css

179 ms

lightbox.css

183 ms

jquery.min.js

7 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that 97% of them (28 requests) were addressed to the original Comeniusmuseum.nl, 3% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (607 ms) belongs to the original domain Comeniusmuseum.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 223.1 kB (32%)

Content Size

694.9 kB

After Optimization

471.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Comeniusmuseum.nl main page is 694.9 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. 20% of websites need less resources to load. Images take 430.1 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 9.9 kB

  • Original 13.2 kB
  • After minification 12.3 kB
  • After compression 3.3 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 9.9 kB or 75% of the original size.

Image Optimization

-2%

Potential reduce by 9.9 kB

  • Original 430.1 kB
  • After minification 420.2 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. Comenius Museum images are well optimized though.

JavaScript Optimization

-81%

Potential reduce by 197.4 kB

  • Original 243.7 kB
  • After minification 177.3 kB
  • After compression 46.4 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 197.4 kB or 81% of the original size.

CSS Optimization

-76%

Potential reduce by 5.9 kB

  • Original 7.8 kB
  • After minification 5.6 kB
  • After compression 1.9 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. Comeniusmuseum.nl needs all CSS files to be minified and compressed as it can save up to 5.9 kB or 76% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (30%)

Requests Now

27

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 27 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Comenius Museum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

comeniusmuseum.nl accessibility score

91

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

Best Practices

comeniusmuseum.nl best practices score

75

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

comeniusmuseum.nl SEO score

98

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

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 Comeniusmuseum.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 Comeniusmuseum.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 Comenius Museum. 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: