4.3 sec in total
958 ms
3 sec
316 ms
Welcome to knihy.vltava.cz homepage info - get ready to check Knihy Vltava best content for Czech Republic right away, or after learning these important things about knihy.vltava.cz
Default Description
Visit knihy.vltava.czWe analyzed Knihy.vltava.cz page load time and found that the first response time was 958 ms and then it took 3.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
knihy.vltava.cz performance score
name
value
score
weighting
Value8.6 s
0/100
10%
Value9.2 s
1/100
25%
Value11.5 s
5/100
10%
Value280 ms
81/100
30%
Value0
100/100
15%
Value12.2 s
15/100
10%
958 ms
197 ms
395 ms
297 ms
300 ms
Our browser made a total of 66 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Knihy.vltava.cz, 3% (2 requests) were made to Googletagmanager.com and 3% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (958 ms) relates to the external source Tony.cz.
Page size can be reduced by 954.5 kB (68%)
1.4 MB
444.2 kB
In fact, the total size of Knihy.vltava.cz main page is 1.4 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 642.6 kB which makes up the majority of the site volume.
Potential reduce by 385.1 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 385.1 kB or 89% of the original size.
Potential reduce by 7.7 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. Knihy Vltava images are well optimized though.
Potential reduce by 456.1 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 456.1 kB or 71% of the original size.
Potential reduce by 105.6 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. Knihy.vltava.cz needs all CSS files to be minified and compressed as it can save up to 105.6 kB or 84% of the original size.
Number of requests can be reduced by 34 (54%)
63
29
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Knihy Vltava. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
tony.cz
958 ms
widgets.css
197 ms
styles.css
395 ms
custom.css
297 ms
chosen.css
300 ms
cookielaw.css
298 ms
prototype.js
707 ms
ccard.js
401 ms
validation.js
496 ms
builder.js
402 ms
effects.js
572 ms
dragdrop.js
492 ms
controls.js
592 ms
slider.js
495 ms
js.js
591 ms
form.js
593 ms
menu.js
592 ms
translate.js
670 ms
cookies.js
689 ms
jquery.latest.js
788 ms
chosen.jquery.js
796 ms
hello.jquery.js
796 ms
jquery.cycle.all.js
767 ms
custom.js
786 ms
js
66 ms
swfobject.js
786 ms
retargeting.js
715 ms
logo.gif
159 ms
search_ico.gif
159 ms
col_left_callout.jpg
159 ms
i_asc_arrow.gif
160 ms
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405 ms
col_right_callout.jpg
406 ms
creditcards.gif
404 ms
divider_top.gif
329 ms
cart_ico.png
328 ms
checkout_ico.png
330 ms
menu_bg.gif
424 ms
menu_active.gif
425 ms
menu_bullet.png
426 ms
bkg_nav_parent.gif
426 ms
search_bg.png
427 ms
js
96 ms
block_bg_repeat.gif
287 ms
block_title_alt.gif
414 ms
block_bg_bottom.gif
415 ms
leftnav_arrow.gif
416 ms
analytics.js
17 ms
bkg_toolbar.gif
368 ms
bkg_btn.png
369 ms
collect
13 ms
print.css
100 ms
knihy.vltava.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
<input type="image"> elements do not have [alt] text
Form elements do not have associated labels
knihy.vltava.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
Page has valid source maps
knihy.vltava.cz SEO score
CS
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Knihy.vltava.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it matches the claimed language. Our system also found out that Knihy.vltava.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.
knihy.vltava.cz
Open Graph description is not detected on the main page of Knihy Vltava. 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: