3.1 sec in total
260 ms
2.4 sec
437 ms
Click here to check amazing Oba content for Netherlands. Otherwise, check out these important facts you probably never knew about oba.nl
Je bent van harte welkom bij alle 28 locaties van de OBA. Ontdek ons uitgebreide aanbod aan boeken, activiteiten en studieplekken.
Visit oba.nlWe analyzed Oba.nl page load time and found that the first response time was 260 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.
oba.nl performance score
name
value
score
weighting
Value2.7 s
61/100
10%
Value6.3 s
11/100
25%
Value5.1 s
61/100
10%
Value70 ms
99/100
30%
Value0.014
100/100
15%
Value5.0 s
77/100
10%
260 ms
772 ms
336 ms
252 ms
421 ms
Our browser made a total of 97 requests to load all elements on the main page. We found that 51% of them (49 requests) were addressed to the original Oba.nl, 31% (30 requests) were made to Coverservice.bibliotheek.nl and 9% (9 requests) were made to Gids2.nl. The less responsive or slowest element that took the longest time to load (873 ms) belongs to the original domain Oba.nl.
Page size can be reduced by 623.3 kB (32%)
1.9 MB
1.3 MB
In fact, the total size of Oba.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. 60% of websites need less resources to load. Images take 1.4 MB which makes up the majority of the site volume.
Potential reduce by 79.6 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 31.0 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 79.6 kB or 86% of the original size.
Potential reduce by 206.4 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. Obviously, Oba needs image optimization as it can save up to 206.4 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 135.5 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 135.5 kB or 65% of the original size.
Potential reduce by 201.8 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. Oba.nl needs all CSS files to be minified and compressed as it can save up to 201.8 kB or 83% of the original size.
Number of requests can be reduced by 17 (18%)
93
76
The browser has sent 93 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Oba. 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 as a result speed up the page load time.
oba.nl
260 ms
www.oba.nl
772 ms
clientlibs.min.bcb64fd180166199430cf17ab5934b21.css
336 ms
amsterdam.min.9853d50e1f93c4976face604244ce563.css
252 ms
jquery.min.8449879e68d64f217e527ab5387bf65e.js
421 ms
utils.min.cd31222ac49213ace66f3568912db918.js
180 ms
granite.min.e26b5f40a34d432bee3ded1ccbdc7041.js
246 ms
jquery.min.d7c42e4a257b8b9fe38d1c53dd20d01a.js
256 ms
clientlibs.min.d43cb0ebb620958a88bccb98dccac972.js
452 ms
344046834
498 ms
a_H_cd1h2vY
197 ms
index.php
347 ms
cq5dam.web.384.614.jpeg
753 ms
index.php
242 ms
index.php
237 ms
index.php
243 ms
index.php
245 ms
index.php
247 ms
index.php
418 ms
index.php
418 ms
index.php
418 ms
html-bg-gradient.png
207 ms
amsterdam_oba_logo_kort_hor_rood_rgb.png
111 ms
arrow-right-black.png
106 ms
schatkamer-bg.gif
103 ms
cq5dam.web.200.320.jpeg
107 ms
cq5dam.web.200.320.jpeg
204 ms
cq5dam.web.200.320.jpeg
205 ms
cq5dam.web.200.320.jpeg
367 ms
cq5dam.web.200.320.jpeg
208 ms
cq5dam.web.200.320.jpeg
208 ms
cq5dam.web.200.320.jpeg
369 ms
cq5dam.web.200.320.jpeg
365 ms
cq5dam.web.200.320.jpeg
365 ms
link-item-hover.png
366 ms
cq5dam.web.792.1267.png
819 ms
cq5dam.web.384.614.jpeg
458 ms
cq5dam.web.384.614.jpeg
464 ms
cq5dam.web.384.614.jpeg
369 ms
cq5dam.web.200.320.jpeg
369 ms
cq5dam.web.200.320.jpeg
455 ms
cq5dam.web.200.320.jpeg
462 ms
cq5dam.web.200.320.jpeg
461 ms
cq5dam.web.200.320.jpeg
509 ms
cq5dam.web.200.320.jpeg
511 ms
cq5dam.web.200.320.jpeg
544 ms
cq5dam.web.200.320.png
543 ms
cq5dam.web.200.320.jpeg
543 ms
cq5dam.web.384.614.jpeg
592 ms
cq5dam.web.384.614.jpeg
591 ms
cq5dam.web.384.614.png
873 ms
cq5dam.web.384.614.gif
625 ms
bg-plectrum.png
625 ms
plectrum-footer-light.png
676 ms
arrow-large-right-red.png
675 ms
arrow-left-red.png
705 ms
371290058
357 ms
304783218
362 ms
343556367
358 ms
308052161
359 ms
313806136
358 ms
325829969
450 ms
322877334
372 ms
318912066
372 ms
197878776
371 ms
362786909
448 ms
327080639
454 ms
330547038
462 ms
37474761X
461 ms
292601646
459 ms
343310627
504 ms
369867742
506 ms
301913072
536 ms
220333734
547 ms
089156471
549 ms
399277595
550 ms
393859312
584 ms
394319036
585 ms
393640124
618 ms
394064445
635 ms
396542824
642 ms
396120369
641 ms
393809110
667 ms
384097189
668 ms
39435219X
703 ms
arrow-large-left-black.png
697 ms
www-embed-player-vflZsBgOl.css
70 ms
www-embed-player.js
98 ms
base.js
175 ms
arrow-large-right-black.png
659 ms
arrow-right-grey.png
658 ms
arrow-right-white.png
691 ms
arrow-left-black.png
689 ms
6BOEML_YqI6cKINK5dmh8ZufcXg7sBa4jeB-I9gQ0xI.js
51 ms
ad_status.js
56 ms
zN7GBFwfMP4uA6AR0HCoLQ.ttf
109 ms
RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf
119 ms
oba.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
<frame> or <iframe> elements do not have a title
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.
oba.nl best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Page has valid source maps
oba.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
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Oba.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 Oba.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.
oba.nl
Open Graph description is not detected on the main page of Oba. 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: