Tools & Wizards About Us
rekenen-oefenen.nl screenshot

Report Summary

  • 57

    Performance

    Renders faster than
    73% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% 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

2.8 sec in total

First Response

194 ms

Resources Loaded

1.8 sec

Page Rendered

802 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 194 ms and then it took 2.7 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

57

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value4.5 s

37/100

25%

SI (Speed Index)

Value4.1 s

80/100

10%

TBT (Total Blocking Time)

Value670 ms

44/100

30%

CLS (Cumulative Layout Shift)

Value0.005

100/100

15%

TTI (Time to Interactive)

Value6.5 s

58/100

10%

Network Requests Diagram

rekenen-oefenen.nl

194 ms

www.rekenen-oefenen.nl

658 ms

app.css

192 ms

front.css

276 ms

start.css

276 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that 43% of them (29 requests) were addressed to the original Rekenen-oefenen.nl, 53% (36 requests) were made to Assets.junioreinstein.nl and 1% (1 request) were made to Static.getclicky.com. The less responsive or slowest element that took the longest time to load (658 ms) belongs to the original domain Rekenen-oefenen.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 141.3 kB (20%)

Content Size

699.8 kB

After Optimization

558.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rekenen-oefenen.nl main page is 699.8 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. 50% of websites need less resources to load. Images take 418.4 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 54.9 kB

  • Original 62.7 kB
  • After minification 41.1 kB
  • After compression 7.7 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 21.6 kB, which is 34% 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 54.9 kB or 88% of the original size.

Image Optimization

-0%

Potential reduce by 309 B

  • Original 418.4 kB
  • After minification 418.1 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

-47%

Potential reduce by 81.3 kB

  • Original 173.8 kB
  • After minification 173.8 kB
  • After compression 92.5 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 81.3 kB or 47% of the original size.

CSS Optimization

-10%

Potential reduce by 4.7 kB

  • Original 44.9 kB
  • After minification 44.9 kB
  • After compression 40.2 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 has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 20 (30%)

Requests Now

66

After Optimization

46

  • Images
  • JavaScript
  • CSS

The browser has sent 66 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 8 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

rekenen-oefenen.nl

rekenen-oefenen.nl

194 ms

www.rekenen-oefenen.nl

www.rekenen-oefenen.nl

658 ms

app.css

app.css

192 ms

front.css

front.css

276 ms

start.css

start.css

276 ms

jquery3.4.1.min.js

jquery3.4.1.min.js

372 ms

foundation.js

foundation.js

560 ms

tooltipster.bundle.js

tooltipster.bundle.js

440 ms

ajax.commands.js

ajax.commands.js

284 ms

js

js

37 ms

js

js

55 ms

app_header.js

app_header.js

366 ms

397a43d675433e37ec1274ac.jpg

397a43d675433e37ec1274ac.jpg

70 ms

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05024b2e4ecd34cacbb4e336.svg

50 ms

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3ec163a841112691f372e797.svg

65 ms

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4a61b0e12addc63e8bc7b4b7.svg

66 ms

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9b173e1e6b9399df208af905.svg

78 ms

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48 ms

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69 ms

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f4f624e26d8a230e53d04415.svg

55 ms

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606d98d2ca6c0_nl.rekenenoefenen.svg

52 ms

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606d98f45718f_nl.taaloefenen.svg

78 ms

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606d8bfc267d4_nl.citotoetsoefenen.svg

80 ms

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70 ms

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67 ms

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606d990a8e1a6_nl.verkeeroefenen.svg

71 ms

606d98c5c8ee0_nl.natuurentechniekoefenen.svg

606d98c5c8ee0_nl.natuurentechniekoefenen.svg

72 ms

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74 ms

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79 ms

606d8c2161186_nl.detafelsoefenen.svg

606d8c2161186_nl.detafelsoefenen.svg

74 ms

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606d98bb0030e_nl.levensbeschouwingoefenen.svg

75 ms

606d99008853a_nl.topooefenen.svg

606d99008853a_nl.topooefenen.svg

81 ms

606d989b72c87_nl.kleutersoefenen.svg

606d989b72c87_nl.kleutersoefenen.svg

480 ms

606d98937d9ee_nl.junioreinstein.svg

606d98937d9ee_nl.junioreinstein.svg

82 ms

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83 ms

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85 ms

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84 ms

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486 ms

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97 ms

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86 ms

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86 ms

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87 ms

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87 ms

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591 ms

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88 ms

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499 ms

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476 ms

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125e2e71aa648460c4fa09d2.png

103 ms

white-square.png

white-square.png

95 ms

logo.svg

logo.svg

93 ms

home.svg

home.svg

94 ms

online.svg

online.svg

96 ms

price.svg

price.svg

102 ms

reviews.svg

reviews.svg

201 ms

book.svg

book.svg

202 ms

worksheet.svg

worksheet.svg

201 ms

faq.svg

faq.svg

203 ms

vacancies.svg

vacancies.svg

204 ms

contact.svg

contact.svg

275 ms

team.svg

team.svg

281 ms

login.svg

login.svg

284 ms

sprite-stars.svg

sprite-stars.svg

283 ms

sprite_subcat.svg

sprite_subcat.svg

369 ms

tick-cross-sprite.svg

tick-cross-sprite.svg

284 ms

facebook-icon.svg

facebook-icon.svg

339 ms

pinterest-icon.svg

pinterest-icon.svg

367 ms

instagram-icon.svg

instagram-icon.svg

374 ms

in.php

in.php

112 ms

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

rekenen-oefenen.nl

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: