Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

rekenen-oefenen.nl

Online rekenen groep 2 t/m 8 | Junior Einstein

Page Load Speed

3.2 sec in total

First Response

332 ms

Resources Loaded

2.2 sec

Page Rendered

699 ms

rekenen-oefenen.nl screenshot

About Website

Click here to check amazing Rekenen Oefenen content for Netherlands. Otherwise, check out these important facts you probably never knew about rekenen-oefenen.nl

Leren rekenen zoals op school. Bussommen, erbijsommen, erafsommen, cijferen, breuken, delen? Je kunt het allemaal oefenen. Duizenden online vragen voor groep 2 t/m 8.

Visit rekenen-oefenen.nl

Key Findings

We analyzed Rekenen-oefenen.nl page load time and found that the first response time was 332 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

rekenen-oefenen.nl performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

39/100

10%

LCP (Largest Contentful Paint)

Value6.2 s

11/100

25%

SI (Speed Index)

Value4.8 s

68/100

10%

TBT (Total Blocking Time)

Value4,220 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value9.1 s

33/100

10%

Network Requests Diagram

rekenen-oefenen.nl

332 ms

www.rekenen-oefenen.nl

434 ms

www.rekenen-oefenen.nl

412 ms

css_aCJD6Z8Sye8gWK8vWsUFEyI2seTagTe3lzfZAXKPhew.css

85 ms

css

59 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 73% of them (30 requests) were addressed to the original Rekenen-oefenen.nl, 10% (4 requests) were made to Fonts.gstatic.com and 5% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (504 ms) belongs to the original domain Rekenen-oefenen.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 341.6 kB (37%)

Content Size

917.6 kB

After Optimization

576.0 kB

In fact, the total size of Rekenen-oefenen.nl main page is 917.6 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. 40% of websites need less resources to load. Images take 422.5 kB which makes up the majority of the site volume.

HTML Optimization

-86%

Potential reduce by 44.5 kB

  • Original 51.8 kB
  • After minification 33.9 kB
  • After compression 7.3 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. This page needs HTML code to be minified as it can gain 18.0 kB, which is 35% 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 44.5 kB or 86% of the original size.

Image Optimization

-3%

Potential reduce by 12.7 kB

  • Original 422.5 kB
  • After minification 409.7 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. Rekenen Oefenen images are well optimized though.

JavaScript Optimization

-53%

Potential reduce by 152.0 kB

  • Original 287.7 kB
  • After minification 251.1 kB
  • After compression 135.7 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 152.0 kB or 53% of the original size.

CSS Optimization

-85%

Potential reduce by 132.4 kB

  • Original 155.6 kB
  • After minification 154.5 kB
  • After compression 23.2 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. Rekenen-oefenen.nl needs all CSS files to be minified and compressed as it can save up to 132.4 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (18%)

Requests Now

33

After Optimization

27

The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rekenen Oefenen. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

rekenen-oefenen.nl accessibility score

59

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

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

Best Practices

rekenen-oefenen.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

Page has valid source maps

SEO Factors

rekenen-oefenen.nl SEO score

90

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

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

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 Rekenen-oefenen.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 Rekenen-oefenen.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 Rekenen Oefenen. 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: