Report Summary

  • 95

    Performance

    Renders faster than
    94% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 31% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 78

    SEO

    Google-friendlier than
    39% of websites

samenvattingenbank.nl

WorldSupporter | Summaries & Study Notes

Page Load Speed

8.6 sec in total

First Response

3 sec

Resources Loaded

5.4 sec

Page Rendered

210 ms

samenvattingenbank.nl screenshot

About Website

Welcome to samenvattingenbank.nl homepage info - get ready to check Samenvattingenbank best content right away, or after learning these important things about samenvattingenbank.nl

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Key Findings

We analyzed Samenvattingenbank.nl page load time and found that the first response time was 3 sec and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

samenvattingenbank.nl performance score

95

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

94/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

87/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value1.9 s

100/100

10%

Network Requests Diagram

samenvattingenbank.nl

2985 ms

reset.css

708 ms

divresize.js

207 ms

johocss40.css.php

714 ms

3col40.css.php

705 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 98% of them (41 requests) were addressed to the original Samenvattingenbank.nl, 2% (1 request) were made to Joho.nl. The less responsive or slowest element that took the longest time to load (3 sec) belongs to the original domain Samenvattingenbank.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 100.9 kB (14%)

Content Size

744.2 kB

After Optimization

643.3 kB

In fact, the total size of Samenvattingenbank.nl main page is 744.2 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. 35% of websites need less resources to load. Images take 621.1 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 64.7 kB

  • Original 80.7 kB
  • After minification 79.6 kB
  • After compression 16.0 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 64.7 kB or 80% of the original size.

Image Optimization

-0%

Potential reduce by 648 B

  • Original 621.1 kB
  • After minification 620.4 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. Samenvattingenbank images are well optimized though.

JavaScript Optimization

-76%

Potential reduce by 4.0 kB

  • Original 5.2 kB
  • After minification 4.0 kB
  • After compression 1.2 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 4.0 kB or 76% of the original size.

CSS Optimization

-85%

Potential reduce by 31.6 kB

  • Original 37.3 kB
  • After minification 30.5 kB
  • After compression 5.7 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. Samenvattingenbank.nl needs all CSS files to be minified and compressed as it can save up to 31.6 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (8%)

Requests Now

39

After Optimization

36

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Samenvattingenbank. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

samenvattingenbank.nl accessibility score

65

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.

Internationalization and localization

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

Impact

Issue

High

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

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

samenvattingenbank.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

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

samenvattingenbank.nl SEO score

78

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 doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Samenvattingenbank.nl can be misinterpreted by Google and other search engines. Our service has detected that English 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 Samenvattingenbank.nl main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of Samenvattingenbank. 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: