3.5 sec in total
767 ms
2.5 sec
259 ms
Click here to check amazing ISBW content for Netherlands. Otherwise, check out these important facts you probably never knew about isbw.nl
Bij ISBW vind je meer dan 200 praktijkgerichte opleidingen en trainingen op zowel MBO-, HBO- als Post HBO-niveau. Bekijk het gehele opleidingsaanbod!
Visit isbw.nlWe analyzed Isbw.nl page load time and found that the first response time was 767 ms and then it took 2.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
isbw.nl performance score
name
value
score
weighting
Value3.9 s
24/100
10%
Value6.2 s
11/100
25%
Value8.7 s
16/100
10%
Value1,540 ms
13/100
30%
Value0.064
97/100
15%
Value14.0 s
10/100
10%
767 ms
559 ms
187 ms
295 ms
313 ms
Our browser made a total of 64 requests to load all elements on the main page. We found that 61% of them (39 requests) were addressed to the original Isbw.nl, 6% (4 requests) were made to Dev.visualwebsiteoptimizer.com and 6% (4 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (767 ms) belongs to the original domain Isbw.nl.
Page size can be reduced by 891.5 kB (68%)
1.3 MB
415.7 kB
In fact, the total size of Isbw.nl main page is 1.3 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. 45% of websites need less resources to load. Javascripts take 649.2 kB which makes up the majority of the site volume.
Potential reduce by 66.8 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 66.8 kB or 78% of the original size.
Potential reduce by 13.4 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. ISBW images are well optimized though.
Potential reduce by 464.8 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 464.8 kB or 72% of the original size.
Potential reduce by 346.6 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. Isbw.nl needs all CSS files to be minified and compressed as it can save up to 346.6 kB or 89% of the original size.
Number of requests can be reduced by 49 (83%)
59
10
The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ISBW. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 44 to 1 for JavaScripts and as a result speed up the page load time.
www.isbw.nl
767 ms
main.css
559 ms
respond.js
187 ms
modernizr-2.8.3.js
295 ms
app.js
313 ms
widget_v2.134.js
8 ms
WebResource.axd
197 ms
ScriptResource.axd
194 ms
ScriptResource.axd
421 ms
ScriptResource.axd
287 ms
js
296 ms
j.php
14 ms
ISBW_logo.png
132 ms
Studiegids-ISBW-Opleidingen-Trainingen.jpg
208 ms
gtm.js
95 ms
v.gif
28 ms
va-f9423035fc9f0fdad5f7654cfb9df14b.js
40 ms
spritesheet.png
109 ms
desktop_banner_home.jpg
311 ms
require.component_loader.js
105 ms
startup.js
120 ms
__$$__stringtable_lang_nl.js
14 ms
hotjar-51047.js
93 ms
fbevents.js
81 ms
analytics.js
23 ms
conversion_async.js
20 ms
42 ms
linkid.js
24 ms
jquery-1.11.3.min.js
107 ms
domReady.js
104 ms
selectordie-0.1.8.js
106 ms
jquery.currentmedia.js
111 ms
jquery.phswap.js
148 ms
jquery.mmteaser.js
176 ms
collect
18 ms
collect
54 ms
36 ms
96 ms
modules-043c1e6abe660c48857202e419ff9d8a.js
29 ms
ga-audiences
26 ms
jquery_throttle.js
103 ms
nr-885.min.js
33 ms
l.gif
27 ms
collect
21 ms
Studiegids-ISBW-Opleidingen-Trainingen.jpg
106 ms
desktop_banner_home.jpg
201 ms
collect
12 ms
controller.js
94 ms
controller.js
111 ms
controller.js
102 ms
controller.js
121 ms
controller.js
186 ms
cookieFloater.js
198 ms
3313a79196
44 ms
ga-audiences
16 ms
visit-data
239 ms
view.js
107 ms
view.js
119 ms
view.js
142 ms
view.js
320 ms
courseLightbox.js
256 ms
brochureLightbox.js
256 ms
planningLightbox.js
254 ms
js.cookie-2.0.3.js
245 ms
isbw.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.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
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.
isbw.nl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
isbw.nl SEO score
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
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Isbw.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 Isbw.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.
isbw.nl
Open Graph description is not detected on the main page of ISBW. 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: