Report Summary

  • 74

    Performance

    Renders faster than
    84% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 90% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 99

    SEO

    Google-friendlier than
    94% of websites

museumrotterdam.nl

Museum Rotterdam — van de stad

Page Load Speed

3.1 sec in total

First Response

353 ms

Resources Loaded

2.1 sec

Page Rendered

662 ms

museumrotterdam.nl screenshot

About Website

Welcome to museumrotterdam.nl homepage info - get ready to check Museum Rotterdam best content for Netherlands right away, or after learning these important things about museumrotterdam.nl

Museum Rotterdam is een unieke schatkamer, van en voor de stad Rotterdam. Een plaats waar iedereen welkom is die Rotterdam wil leren kennen.

Visit museumrotterdam.nl

Key Findings

We analyzed Museumrotterdam.nl page load time and found that the first response time was 353 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

museumrotterdam.nl performance score

74

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

90/100

10%

LCP (Largest Contentful Paint)

Value6.1 s

12/100

25%

SI (Speed Index)

Value2.8 s

95/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value5.2 s

74/100

10%

Network Requests Diagram

museumrotterdam.nl

353 ms

museumrotterdam.nl

558 ms

style.css

90 ms

81efb72b-4c56-401f-8eb3-937e58f26fa5.js

154 ms

jquery-1.12.0.min.js

49 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 27% of them (7 requests) were addressed to the original Museumrotterdam.nl, 27% (7 requests) were made to Assets0.museumrotterdam.nl and 19% (5 requests) were made to Assets1.museumrotterdam.nl. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source Assets1.museumrotterdam.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 240.2 kB (18%)

Content Size

1.4 MB

After Optimization

1.1 MB

In fact, the total size of Museumrotterdam.nl main page is 1.4 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. 25% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 25.2 kB

  • Original 33.5 kB
  • After minification 32.0 kB
  • After compression 8.4 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 25.2 kB or 75% of the original size.

Image Optimization

-1%

Potential reduce by 14.1 kB

  • Original 1.0 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. Museum Rotterdam images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 150.4 kB

  • Original 224.2 kB
  • After minification 224.2 kB
  • After compression 73.8 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 150.4 kB or 67% of the original size.

CSS Optimization

-83%

Potential reduce by 50.5 kB

  • Original 60.6 kB
  • After minification 60.2 kB
  • After compression 10.1 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. Museumrotterdam.nl needs all CSS files to be minified and compressed as it can save up to 50.5 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (22%)

Requests Now

23

After Optimization

18

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Museum Rotterdam. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

museumrotterdam.nl accessibility score

96

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

museumrotterdam.nl best practices score

83

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

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

museumrotterdam.nl SEO score

99

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

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Museumrotterdam.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 Museumrotterdam.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 Museum Rotterdam. 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: