10.3 sec in total
2.9 sec
6.6 sec
746 ms
Click here to check amazing HLZ content for Netherlands. Otherwise, check out these important facts you probably never knew about hlz.nl
In ons kleinschalige en sfeervolle schoolgebouw, midden in Amsterdam Zuid, hebben we alle ervaring en kundigheid in huis om leerlingen te laten groeien.
Visit hlz.nlWe analyzed Hlz.nl page load time and found that the first response time was 2.9 sec and then it took 7.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
hlz.nl performance score
name
value
score
weighting
Value11.3 s
0/100
10%
Value16.1 s
0/100
25%
Value19.0 s
0/100
10%
Value2,290 ms
5/100
30%
Value0.061
97/100
15%
Value32.0 s
0/100
10%
2920 ms
494 ms
272 ms
276 ms
370 ms
Our browser made a total of 42 requests to load all elements on the main page. We found that 83% of them (35 requests) were addressed to the original Hlz.nl, 5% (2 requests) were made to S.ytimg.com and 2% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (3.3 sec) belongs to the original domain Hlz.nl.
Page size can be reduced by 663.0 kB (12%)
5.7 MB
5.0 MB
In fact, the total size of Hlz.nl main page is 5.7 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 5.0 MB which makes up the majority of the site volume.
Potential reduce by 25.4 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 25.4 kB or 77% of the original size.
Potential reduce by 135.8 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. HLZ images are well optimized though.
Potential reduce by 137.9 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 137.9 kB or 65% of the original size.
Potential reduce by 364.0 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. Hlz.nl needs all CSS files to be minified and compressed as it can save up to 364.0 kB or 83% of the original size.
Number of requests can be reduced by 9 (22%)
41
32
The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of HLZ. 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 JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.
hlz.nl
2920 ms
wp-emoji-release.min.js
494 ms
jquery.magnificpopup.css
272 ms
2-layout.css
276 ms
font-awesome.min.css
370 ms
css
61 ms
bootstrap.css
642 ms
style.css
591 ms
logo-hlz.png
632 ms
fU_pDNurfWs
134 ms
magister.png
580 ms
hlz-huisstijl-overzicht-800x800px_c.jpg
892 ms
logo.png
516 ms
fslide05-570x392.jpg
957 ms
Advertentie-rector-Hervormd-Lyceum-Zuid-VK-12-mrt-2016-570x424.jpg
997 ms
doejemee-e1453467322140-570x424.png
1469 ms
visie-side-1.png
1980 ms
141229-uitleg-aan-de-dames-2-570x424.jpg
1097 ms
jquery-1.11.3.min.js
29 ms
jquery.magnificpopup.min.js
819 ms
2-layout.js
1077 ms
bootstrap.min.js
1272 ms
plugins.js
1452 ms
scripts.js
1131 ms
wp-embed.min.js
1235 ms
www-embed-player-vflfNyN_r.css
37 ms
www-embed-player.js
62 ms
Tqng9ngJVK4Gqvh3e602hP-HqlN49KFEUSDtmrOPmWo.js
30 ms
ad_status.js
30 ms
jquery.js
1262 ms
jquery.migrate.min.js
965 ms
background.jpg
1175 ms
loupe.png
993 ms
doejemee-e1453467322140.png
3262 ms
facebook.png
2184 ms
Claire_Raam_061003-e1453122561787.jpg
2868 ms
orange.png
1496 ms
green.png
1633 ms
red.png
1714 ms
achtertuin-aanpas.jpg
2314 ms
cd-top-arrow.svg
1837 ms
glyphicons-halflings-regular.woff
2442 ms
hlz.nl accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Links do not have a discernible name
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
hlz.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
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
Issues were logged in the Issues panel in Chrome Devtools
hlz.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
Tap targets are not sized appropriately
NL
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Hlz.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 Hlz.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.
hlz.nl
Open Graph data is detected on the main page of HLZ. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: