Access rekentoppers.nl. Sommen oefenen, rekenspelletjes groep 3, 4, 5, 6, 7 en 8

Report Summary

About Website

Click here to check amazing Rek En Toppers content for Russia. Otherwise, check out these important facts you probably never knew about rekentoppers.nl

Op sommenoefenen.nl leer je sommen snel uitrekenen met leuke rekenspelletjes. Voor groep 3, 4, 5, 6 ,7 en 8!

Visit rekentoppers.nl

name

value

score

weighting

FCP (First Contentful Paint)

Value5.5 s

6/100

10%

LCP (Largest Contentful Paint)

Value19.3 s

0/100

25%

SI (Speed Index)

Value11.1 s

5/100

10%

TBT (Total Blocking Time)

Value1,610 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.012

100/100

15%

TTI (Time to Interactive)

Value18.5 s

3/100

10%

rekentoppers.nl

357 ms

www.sommenoefenen.nl

695 ms

gtm.js

68 ms

sommenoefenennl.js

883 ms

css2

49 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Rekentoppers.nl, 69% (31 requests) were made to Afbeeldingen.spellingoefenen.nl and 11% (5 requests) were made to Js.spellingoefenen.nl. The less responsive or slowest element that took the longest time to load (1.3 sec) relates to the external source Afbeeldingen.spellingoefenen.nl.

Content Size

3.4 MB

After Optimization

3.1 MB

In fact, the total size of Rekentoppers.nl main page is 3.4 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. 30% of websites need less resources to load. Images take 3.3 MB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 10.9 kB

Original 15.1 kB
After minification 13.6 kB
After compression 4.2 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 10.9 kB or 72% of the original size.

Image Optimization

-8%

Potential reduce by 271.7 kB

Original 3.3 MB
After minification 3.0 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. Rek En Toppers images are well optimized though.

JavaScript Optimization

-40%

Potential reduce by 57.9 kB

Original 145.7 kB
After minification 127.0 kB
After compression 87.8 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 57.9 kB or 40% of the original size.

CSS Optimization

-89%

Potential reduce by 24.4 kB

Original 27.3 kB
After minification 14.5 kB
After compression 2.9 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. Rekentoppers.nl needs all CSS files to be minified and compressed as it can save up to 24.4 kB or 89% of the original size.

Requests Now

After Optimization

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rek En Toppers. 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 from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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 Rekentoppers.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 Rekentoppers.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

rekentoppers.nl

Open Graph data is detected on the main page of Rek En Toppers. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

Sommen oefenen, rekenspelletjes groep 3, 4, 5, 6, 7 en 8

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)