6.2 sec in total
519 ms
5.1 sec
547 ms
Welcome to ziber.nl homepage info - get ready to check Ziber best content for Netherlands right away, or after learning these important things about ziber.nl
Het best beoordeelde onderwijsplatform dat iedereen in opvang en primair onderwijs verbindt.
Visit ziber.nlWe analyzed Ziber.nl page load time and found that the first response time was 519 ms and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
ziber.nl performance score
name
value
score
weighting
Value7.6 s
1/100
10%
Value8.1 s
2/100
25%
Value9.7 s
10/100
10%
Value300 ms
79/100
30%
Value1.129
1/100
15%
Value8.8 s
35/100
10%
519 ms
398 ms
1187 ms
414 ms
253 ms
Our browser made a total of 73 requests to load all elements on the main page. We found that 86% of them (63 requests) were addressed to the original Ziber.nl, 5% (4 requests) were made to Fonts.gstatic.com and 3% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Ziber.nl.
Page size can be reduced by 133.2 kB (16%)
831.2 kB
698.0 kB
In fact, the total size of Ziber.nl main page is 831.2 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. 25% of websites need less resources to load. Images take 712.5 kB which makes up the majority of the site volume.
Potential reduce by 41.2 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 41.2 kB or 77% of the original size.
Potential reduce by 54.7 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. Ziber images are well optimized though.
Potential reduce by 29.1 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 29.1 kB or 52% of the original size.
Potential reduce by 8.2 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. Ziber.nl needs all CSS files to be minified and compressed as it can save up to 8.2 kB or 86% of the original size.
Number of requests can be reduced by 30 (48%)
62
32
The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ziber. 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 from 5 to 1 for CSS and as a result speed up the page load time.
ziber.nl
519 ms
www.ziber.nl
398 ms
welkom.html
1187 ms
site.js
414 ms
common.js
253 ms
validation-simple.js
258 ms
page.css
293 ms
common.css
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combined.css
403 ms
jquery.fancybox-1.3.4.css
335 ms
jquery.fancybox-1.3.4.js
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ga.js
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webfont.js
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css
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ziber.nl accessibility score
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<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
Image elements do not have [alt] attributes
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
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
List items (<li>) are not contained within <ul> or <ol> parent elements.
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
ziber.nl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
ziber.nl SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
Document uses legible font sizes
NL
NL
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Ziber.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 Ziber.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.
ziber.nl
Open Graph description is not detected on the main page of Ziber. 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: