5.5 sec in total
513 ms
4.8 sec
190 ms
Welcome to knihcentrum.sk homepage info - get ready to check KNIHCENTRUM best content for Slovakia right away, or after learning these important things about knihcentrum.sk
Internetové kníhkupectvo KNIHCENTRUM.SK ponúka knihy online, slovníky, mapy, učebnice a kalendáre.
Visit knihcentrum.skWe analyzed Knihcentrum.sk page load time and found that the first response time was 513 ms and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.
knihcentrum.sk performance score
name
value
score
weighting
Value5.3 s
7/100
10%
Value5.4 s
20/100
25%
Value10.6 s
7/100
10%
Value480 ms
60/100
30%
Value0.329
35/100
15%
Value11.6 s
18/100
10%
513 ms
1964 ms
26 ms
417 ms
404 ms
Our browser made a total of 97 requests to load all elements on the main page. We found that 88% of them (85 requests) were addressed to the original Knihcentrum.sk, 3% (3 requests) were made to Google-analytics.com and 2% (2 requests) were made to App2.salesmanago.pl. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Knihcentrum.sk.
Page size can be reduced by 853.3 kB (48%)
1.8 MB
909.7 kB
In fact, the total size of Knihcentrum.sk main page is 1.8 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 647.9 kB which makes up the majority of the site volume.
Potential reduce by 60.9 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 15.1 kB, which is 21% 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 60.9 kB or 83% of the original size.
Potential reduce by 22.1 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. KNIHCENTRUM images are well optimized though.
Potential reduce by 433.7 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 433.7 kB or 67% of the original size.
Potential reduce by 336.7 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. Knihcentrum.sk needs all CSS files to be minified and compressed as it can save up to 336.7 kB or 85% of the original size.
Number of requests can be reduced by 52 (57%)
92
40
The browser has sent 92 CSS, Javascripts, AJAX and image requests in order to completely render the main page of KNIHCENTRUM. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.
knihcentrum.sk
513 ms
www.knihcentrum.sk
1964 ms
css
26 ms
styles.css
417 ms
custom.css
404 ms
individual_SK.css
260 ms
noppem.css
607 ms
responsive.css
544 ms
jquery-ui-1.10.0.custom.min.css
398 ms
footer.css
384 ms
productpromotions.css
508 ms
owl.theme.css
531 ms
owl.carousel.css
551 ms
iview.css
553 ms
style.css
636 ms
braincategories.css
656 ms
productvariants.css
669 ms
watchdog.css
674 ms
dcmegamenu.css
708 ms
emailverifier.css
728 ms
jquery.min.js
8 ms
jquery.unobtrusive-ajax.min.js
760 ms
jquery.validate.min.js
806 ms
jquery.validate.unobtrusive.min.js
800 ms
public.ajaxcart.js
795 ms
modernizr.js
856 ms
personalizedhomepagearea.js
850 ms
productqualitycatalog.js
890 ms
advancedblog.js
924 ms
productpromotions.js
930 ms
productvariants.js
940 ms
watchdog.js
983 ms
jquery.dcmegamenu.1.3.3.min.js
995 ms
popup-marketing.js
1028 ms
advancedcart-flyout.js
1058 ms
BrainPerformance.js
1062 ms
brain.search.js
1080 ms
customerverifier.js
1121 ms
productfilters.js
1137 ms
conversion.js
16 ms
jquery-ui-1.10.0.min.js
1513 ms
jquery.easytabs.min.js
941 ms
combined.js
1013 ms
iview.min.js
845 ms
owl.carousel.js
878 ms
jquery.hoverIntent.minified.js
853 ms
jquery.meanmenu.min.js
819 ms
public.common.js
230 ms
90294327_0.jpeg
260 ms
92588875_0.jpeg
392 ms
knihcentrum_blog_button.png
311 ms
bestseller_flag_catalog.png
364 ms
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378 ms
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heureka.png
642 ms
cart_full_ico.png
642 ms
KNIHCENTRUM.sk.jpg
639 ms
m_glass_low.png
731 ms
bullet-right.gif
724 ms
book.png
732 ms
star_x_inactive.gif
739 ms
star-x-active.gif
750 ms
kosik-maly-modry.png
756 ms
cz.png
844 ms
AjaxLoader.gif
845 ms
facebook.png
862 ms
twitter.png
871 ms
google-plus.png
879 ms
sm.js
357 ms
ga.js
10 ms
inpage_linkid.js
3 ms
__utm.gif
13 ms
collect
67 ms
ga-audiences
35 ms
r.gif
226 ms
108 ms
latest
417 ms
alert.png
396 ms
cart_ico.png
390 ms
92588876_0.jpeg
539 ms
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552 ms
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555 ms
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592 ms
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ui-bg_flat_75_ffffff_40x100.png
519 ms
19 ms
blog_323.jpg
327 ms
blog_322.jpg
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338 ms
knihcentrum.sk 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.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
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
Links do not have a discernible name
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
knihcentrum.sk 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
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
knihcentrum.sk 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
SK
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Knihcentrum.sk can be misinterpreted by Google and other search engines. Our service has detected that Slovak 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 Knihcentrum.sk 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.
knihcentrum.sk
Open Graph description is not detected on the main page of KNIHCENTRUM. 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: