Tools & Wizards About Us

Report Summary

  • 99

    Performance

    Renders faster than
    96% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

insulacollege.zportal.nl

Zermelo insulacollege

Page Load Speed

1.4 sec in total

First Response

99 ms

Resources Loaded

1.2 sec

Page Rendered

128 ms

About Website

Welcome to insulacollege.zportal.nl homepage info - get ready to check Insulacollege Zportal best content for Netherlands right away, or after learning these important things about insulacollege.zportal.nl

Visit insulacollege.zportal.nl

Key Findings

We analyzed Insulacollege.zportal.nl page load time and found that the first response time was 99 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

insulacollege.zportal.nl performance score

99

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

98/100

10%

LCP (Largest Contentful Paint)

Value1.5 s

100/100

25%

SI (Speed Index)

Value1.5 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.065

97/100

15%

TTI (Time to Interactive)

Value1.4 s

100/100

10%

Network Requests Diagram

oauth

99 ms

template.css

85 ms

online.css

167 ms

log.png

248 ms

bg.png

83 ms

Our browser made a total of 10 requests to load all elements on the main page. We found that all of those requests were addressed to Insulacollege.zportal.nl and no external sources were called. The less responsive or slowest element that took the longest time to load (384 ms) belongs to the original domain Insulacollege.zportal.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 9.3 kB (39%)

Content Size

24.0 kB

After Optimization

14.7 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Insulacollege.zportal.nl main page is 24.0 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. Only 5% of websites need less resources to load. Images take 11.9 kB which makes up the majority of the site volume.

HTML Optimization

-56%

Potential reduce by 1.5 kB

  • Original 2.8 kB
  • After minification 2.6 kB
  • After compression 1.2 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 1.5 kB or 56% of the original size.

Image Optimization

-2%

Potential reduce by 192 B

  • Original 11.9 kB
  • After minification 11.7 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. Insulacollege Zportal images are well optimized though.

CSS Optimization

-81%

Potential reduce by 7.6 kB

  • Original 9.3 kB
  • After minification 5.9 kB
  • After compression 1.8 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. Insulacollege.zportal.nl needs all CSS files to be minified and compressed as it can save up to 7.6 kB or 81% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

7

After Optimization

7

  • Images
  • CSS

The browser has sent 7 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Insulacollege Zportal. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

insulacollege.zportal.nl accessibility score

74

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.

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

Best Practices

insulacollege.zportal.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

insulacollege.zportal.nl SEO score

79

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Insulacollege.zportal.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 Insulacollege.zportal.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 Insulacollege Zportal. 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: