4 sec in total
262 ms
3.4 sec
274 ms
Click here to check amazing THEMA content. Otherwise, check out these important facts you probably never knew about thema.nl
Op thema.nl vind je boeken en meer voor de volgende stap in je persoonlijke én professionele ontwikkeling. Bekijk onze webwinkel.
Visit thema.nlWe analyzed Thema.nl page load time and found that the first response time was 262 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
thema.nl performance score
name
value
score
weighting
Value3.0 s
51/100
10%
Value16.8 s
0/100
25%
Value11.2 s
5/100
10%
Value1,520 ms
13/100
30%
Value0.006
100/100
15%
Value11.8 s
17/100
10%
262 ms
438 ms
23 ms
213 ms
255 ms
Our browser made a total of 150 requests to load all elements on the main page. We found that 90% of them (135 requests) were addressed to the original Thema.nl, 2% (3 requests) were made to S7.addthis.com and 1% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (857 ms) belongs to the original domain Thema.nl.
Page size can be reduced by 893.0 kB (45%)
2.0 MB
1.1 MB
In fact, the total size of Thema.nl main page is 2.0 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. 55% of websites need less resources to load. Javascripts take 899.1 kB which makes up the majority of the site volume.
Potential reduce by 149.7 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 149.7 kB or 79% of the original size.
Potential reduce by 57.2 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. THEMA images are well optimized though.
Potential reduce by 614.7 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 614.7 kB or 68% of the original size.
Potential reduce by 71.5 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. Thema.nl needs all CSS files to be minified and compressed as it can save up to 71.5 kB or 82% of the original size.
Number of requests can be reduced by 18 (13%)
144
126
The browser has sent 144 CSS, Javascripts, AJAX and image requests in order to completely render the main page of THEMA. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.
thema.nl
262 ms
www.thema.nl
438 ms
css
23 ms
style.v3.css
213 ms
responsive.css
255 ms
jquery.menu.css
171 ms
jquery.basket.css
172 ms
jquery.slides.css
172 ms
jquery.jcarousel.css
173 ms
jquery.fancybox.css
255 ms
jquery.accordion.css
257 ms
jquery.autocomplete.css
256 ms
jquery.ui.css
339 ms
jquery.plugins.v3.js
632 ms
functions.v11.js
421 ms
addthis_widget.js
10 ms
analytics.js
162 ms
frame_nieuwsbrief.php
136 ms
logo_transparent.png
131 ms
twitter.png
133 ms
facebook.png
132 ms
youtube.png
133 ms
linkedin.png
133 ms
logo2.jpg
255 ms
basket_mobile.png
255 ms
dropdown_home.png
256 ms
dropdown_boeken.png
258 ms
dropdown_ebooks.png
258 ms
dropdown_workshops.png
259 ms
dropdown_tools.png
262 ms
dropdown_waaiers.png
335 ms
dropdown_ecursus.png
337 ms
dropdown_magazine.png
336 ms
dropdown_basket.png
339 ms
dropdown_login.png
338 ms
dropdown_service.png
372 ms
books.png
376 ms
check.png
379 ms
return.png
376 ms
menu_bg.png
378 ms
menu_bg_h.png
380 ms
home.png
463 ms
boeken.png
464 ms
ebook.png
470 ms
workshops.png
468 ms
tools.png
469 ms
waaiers.png
468 ms
ecursussen.png
502 ms
blog.png
502 ms
header_btn_bg.png
552 ms
bulb.png
559 ms
submit_search_bg.png
554 ms
basket.png
437 ms
btn_more_bg.png
468 ms
btn_arrow_down.png
473 ms
banner-home-boekenweek-1458031345.jpg
696 ms
banner-combinatieprijs-1456823620.jpg
691 ms
banner-trainerstitels-korting-1457105227.jpg
691 ms
zhcz-_WihjSQC0oHJ9TCYC3USBnSvpkopQaUR-2r7iU.ttf
120 ms
IQHow_FEYlDC4Gzy_m8fcvEr6Hm6RMS0v1dtXsGir4g.ttf
119 ms
bannercoachcafes2016-1452783934.jpg
696 ms
aaa5d626-278a-49bb-be70-0ee5c3b9acee.js
113 ms
gtm.js
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300lo.json
99 ms
cart_build.php
857 ms
banner-my-career-notes-1452783478.jpg
520 ms
prev_slide.png
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next_slide.png
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link_arrow_right.png
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beren-op-de-weg-spinsels-in-je-hoofd-1-1425553033.jpg
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btn_buy_bg.png
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sh.8e5f85691f9aaa082472a194.html
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collect
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conversion_async.js
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plus_small.png
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star_s_full.png
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star_s_empty.png
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ben-ik-zo-duidelijk-1-1401287345.jpg
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u-lijkt-me-een-vrij-hopeloos-geval-1-1425553163.jpg
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picture-this-1-1425552741.jpg
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feedback-1-1425975272.jpg
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ondernemen-met-lef-1-1401287280.jpg
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persoonlijke-effectiviteit-1-1425552601.jpg
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layers.e5ea973510bf60b3db41.js
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de-weg-naar-excellent-leiderschap-1-1450162803.jpg
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spelen-met-talenten-1-1425552697.jpg
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waaiers_home.png
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coach-de-coach-15-kaarten-1-1425552665.jpg
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tools_home.png
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hoe-lopen-de-hazen-1-1401286386.jpg
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het-teamspel-1-1425552951.jpg
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mobile_boeken.png
570 ms
mobile_ebook.png
618 ms
mobile_workshops.png
575 ms
mobile_tools.png
582 ms
mobile_waaiers.png
584 ms
mobile_magazine.png
558 ms
agenda_date.png
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link_block.png
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btn_arrow_right.png
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offer_link.png
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logo.png
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thema.nl accessibility score
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
Buttons do not have an accessible name
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
[lang] attributes do not have a valid value
thema.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
thema.nl SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
NL
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Thema.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 Thema.nl main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
thema.nl
Open Graph description is not detected on the main page of THEMA. 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: