4.5 sec in total
320 ms
3.7 sec
537 ms
Welcome to website21.cz homepage info - get ready to check Web Site21 best content for Czech Republic right away, or after learning these important things about website21.cz
Nadprůměrná tvorba webových stránek více než 16 let. Nabízíme komplexní služby v oblasti tvorby webu. Poptejte u nás webové stránky, e-shop nebo mobilní aplikaci v C#.
Visit website21.czWe analyzed Website21.cz page load time and found that the first response time was 320 ms and then it took 4.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
website21.cz performance score
name
value
score
weighting
Value5.6 s
5/100
10%
Value5.9 s
14/100
25%
Value7.0 s
33/100
10%
Value360 ms
72/100
30%
Value0.015
100/100
15%
Value6.5 s
59/100
10%
320 ms
646 ms
190 ms
205 ms
205 ms
Our browser made a total of 72 requests to load all elements on the main page. We found that 82% of them (59 requests) were addressed to the original Website21.cz, 3% (2 requests) were made to Fonts.googleapis.com and 3% (2 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Website21.cz.
Page size can be reduced by 532.2 kB (24%)
2.2 MB
1.7 MB
In fact, the total size of Website21.cz main page is 2.2 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. 65% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.
Potential reduce by 74.1 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 74.1 kB or 80% of the original size.
Potential reduce by 17.1 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. Web Site21 images are well optimized though.
Potential reduce by 409.0 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 409.0 kB or 70% of the original size.
Potential reduce by 32.0 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. Website21.cz needs all CSS files to be minified and compressed as it can save up to 32.0 kB or 83% of the original size.
Number of requests can be reduced by 28 (42%)
67
39
The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Web Site21. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.
website21.cz
320 ms
www.website21.cz
646 ms
gzip.php
190 ms
jcemediabox.css
205 ms
style.css
205 ms
spacebreadcrumbs.css
196 ms
spaceshop.css
199 ms
spaceeucookie.css
203 ms
gzip.php
386 ms
gzip.php
296 ms
gzip.php
299 ms
gzip.php
303 ms
jcemediabox.js
418 ms
gzip.php
1400 ms
gzip.php
416 ms
gzip.php
416 ms
gzip.php
422 ms
gzip.php
479 ms
gzip.php
486 ms
jquery.ui.core.min.js
489 ms
jquery.toquerystring.js
489 ms
cart.js
495 ms
gzip.php
580 ms
gzip.php
680 ms
gzip.php
1683 ms
lightbox.js
184 ms
mediaelement-and-player.js
279 ms
spotlight.js
268 ms
css
59 ms
css
71 ms
bg_top.jpg
566 ms
bg_toolbar.png
324 ms
light_effect.png
327 ms
link-1.png
319 ms
link-2.png
322 ms
link-3.png
323 ms
link-4.png
331 ms
link-5.png
328 ms
link-6.png
327 ms
link-7.png
328 ms
link-8.png
331 ms
logo.png
449 ms
logo_flag.png
448 ms
tvorba-e-shopu.jpg
562 ms
seo-optimalizace.jpg
561 ms
joomla-vyvoj-na-zakazku.jpg
599 ms
inovativni-reseni.jpg
842 ms
joomla-hostng.jpg
718 ms
sprava-a-analyza.jpg
739 ms
Joomla3.4Banner-728x90-EN.png
628 ms
robot_zakazkovy_vyvoj.png
642 ms
gopay.png
691 ms
bg_content.jpg
889 ms
bg_bottom_repeat.jpg
688 ms
Ar_3VpXmUWnrZSibgBG1mA.ttf
265 ms
fontawesome-webfont.woff
828 ms
Y731petW8QSBCT5isEDoTg.ttf
265 ms
analytics.js
208 ms
slideshow.js
697 ms
slideset.js
709 ms
widgets.js
131 ms
plusone.js
131 ms
sdk.js
284 ms
popup.html
552 ms
tooltip.html
627 ms
close.png
625 ms
blank.gif
635 ms
collect
39 ms
cb=gapi.loaded_0
117 ms
133 ms
xd_arbiter.php
225 ms
xd_arbiter.php
435 ms
website21.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
Links do not have a discernible name
website21.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
General
Impact
Issue
Detected JavaScript libraries
website21.cz 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
CS
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Website21.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 Website21.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.
website21.cz
Open Graph description is not detected on the main page of Web Site21. 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: