5.3 sec in total
515 ms
4.7 sec
130 ms
Visit vu.nl now to see the best up-to-date Vu content for Netherlands and also check out these interesting facts you probably never knew about vu.nl
Vrije Universiteit Amsterdam
Visit vu.nlWe analyzed Vu.nl page load time and found that the first response time was 515 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
vu.nl performance score
name
value
score
weighting
Value2.5 s
67/100
10%
Value15.3 s
0/100
25%
Value7.3 s
29/100
10%
Value2,900 ms
3/100
30%
Value0.058
98/100
15%
Value10.6 s
23/100
10%
515 ms
574 ms
889 ms
6 ms
386 ms
Our browser made a total of 34 requests to load all elements on the main page. We found that 94% of them (32 requests) were addressed to the original Vu.nl, 3% (1 request) were made to Google-analytics.com and 3% (1 request) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Vu.nl.
Page size can be reduced by 921.3 kB (48%)
1.9 MB
984.2 kB
In fact, the total size of Vu.nl main page is 1.9 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. 25% of websites need less resources to load. Images take 893.2 kB which makes up the majority of the site volume.
Potential reduce by 48.6 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 19.8 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 48.6 kB or 85% of the original size.
Potential reduce by 110.1 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. Obviously, Vu needs image optimization as it can save up to 110.1 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 376.0 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 376.0 kB or 70% of the original size.
Potential reduce by 386.6 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. Vu.nl needs all CSS files to be minified and compressed as it can save up to 386.6 kB or 93% of the original size.
Number of requests can be reduced by 15 (48%)
31
16
The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.
vu.nl
515 ms
index.aspx
574 ms
static
889 ms
ga.js
6 ms
theme_0
386 ms
jquery.cycle.all.min.js
468 ms
ga-searchengines.js
628 ms
ga-links.js
626 ms
colorbox.css
306 ms
jquery.colorbox-min.js
408 ms
body_bg.png
346 ms
Tweelingen1_tcm289-749432.gif
525 ms
VU_banner_vusite_MAdagNL_tcm289-428567.jpg
589 ms
Lustrumconferentie_VU_NL_tcm289-751032.jpg
719 ms
22100_1_webcom_vubanner_socialmedia_ned_tcm289-255114.gif
688 ms
footer_vua_tcm289-14398.gif
481 ms
defaultsprite.png
776 ms
restyle_intranet_arrow.gif
797 ms
135jaarVU_NL_website_tcm289-555768.jpg
1073 ms
general_menu_separator.gif
968 ms
Masteropleiding_gr_tcm289-391517.jpg
1201 ms
arrow2.gif
1070 ms
accordion_down_1.png
1090 ms
accordion_down_2.png
1120 ms
accordion_down_3.png
1327 ms
Zd2E9abXLFGSr9G3YK2MsFzqCfRpIA3W6ypxnPISCPA.woff
54 ms
cookie-bar-bg.png
1389 ms
OAJ_745x215_tcm289-543717.jpg
1540 ms
Dakterras_744x215_tcm289-458398.jpg
1889 ms
PPE_carousel_744_215_tcm289-693807.jpg
2010 ms
border3.png
1561 ms
border4.png
1730 ms
loading.gif
1760 ms
print.css
312 ms
vu.nl accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
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
vu.nl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
vu.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 Vu.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 Vu.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.
vu.nl
Open Graph description is not detected on the main page of Vu. 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: