1.5 sec in total
326 ms
955 ms
263 ms
Welcome to libri.cz homepage info - get ready to check LIBRI best content for Slovakia right away, or after learning these important things about libri.cz
Shop powered by PrestaShop
Visit libri.czWe analyzed Libri.cz page load time and found that the first response time was 326 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.
libri.cz performance score
name
value
score
weighting
Value2.6 s
64/100
10%
Value2.7 s
86/100
25%
Value5.4 s
57/100
10%
Value190 ms
90/100
30%
Value0.085
93/100
15%
Value5.3 s
73/100
10%
326 ms
101 ms
9 ms
197 ms
194 ms
Our browser made a total of 37 requests to load all elements on the main page. We found that 57% of them (21 requests) were addressed to the original Libri.cz, 27% (10 requests) were made to Static.xx.fbcdn.net and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (408 ms) belongs to the original domain Libri.cz.
Page size can be reduced by 39.2 kB (26%)
149.4 kB
110.3 kB
In fact, the total size of Libri.cz main page is 149.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 40% of websites need less resources to load. Images take 84.9 kB which makes up the majority of the site volume.
Potential reduce by 16.6 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 3.5 kB, which is 16% 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 16.6 kB or 76% of the original size.
Potential reduce by 3.8 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. LIBRI images are well optimized though.
Potential reduce by 9.9 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 9.9 kB or 31% of the original size.
Potential reduce by 8.9 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. Libri.cz needs all CSS files to be minified and compressed as it can save up to 8.9 kB or 83% of the original size.
Number of requests can be reduced by 16 (44%)
36
20
The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of LIBRI. 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 4 to 1 for CSS and as a result speed up the page load time.
libri.cz
326 ms
default.css
101 ms
jquery.min.js
9 ms
jquery.fancybox-1.3.1.pack.js
197 ms
jquery.fancybox-1.3.1.css
194 ms
follow_bird_us-b.png
161 ms
ga.js
7 ms
vahy.gif
114 ms
libri.gif
114 ms
basket.png
113 ms
carka.gif
207 ms
li_menu.gif
204 ms
nic.gif
208 ms
podtitul.gif
208 ms
slevy.jpg
336 ms
637.jpg
204 ms
633.jpg
332 ms
632.jpg
333 ms
51.jpg
335 ms
628.jpg
334 ms
635.jpg
333 ms
31.jpg
405 ms
86.jpg
406 ms
li_knihy.gif
408 ms
__utm.gif
25 ms
likebox.php
127 ms
kyEKgjk51ZE.css
35 ms
xgj7bXhJNEH.css
38 ms
q68gy-v_YMF.js
47 ms
FJmpeSpHpjS.js
70 ms
0wM5s1Khldu.js
68 ms
1bNoFZUdlYZ.js
67 ms
10520630_10152561346315428_5117381002600490905_n.jpg
40 ms
wL6VQj7Ab77.png
7 ms
s7jcwEQH7Sx.png
6 ms
I6-MnjEovm5.js
3 ms
pQrUxxo5oQp.js
21 ms
libri.cz 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.
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
Form elements do not have associated labels
Links do not have a discernible name
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.
libri.cz 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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Issues were logged in the Issues panel in Chrome Devtools
libri.cz 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
Tap targets are not sized appropriately
CS
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Libri.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech 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 Libri.cz 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.
libri.cz
Open Graph description is not detected on the main page of LIBRI. 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: