7.4 sec in total
349 ms
6.5 sec
473 ms
Welcome to cbox.cz homepage info - get ready to check Cbox best content right away, or after learning these important things about cbox.cz
Přihlaste se ke svým oblíbeným službám na Centrum.cz.
Visit cbox.czWe analyzed Cbox.cz page load time and found that the first response time was 349 ms and then it took 7 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
cbox.cz performance score
name
value
score
weighting
Value3.6 s
32/100
10%
Value3.6 s
61/100
25%
Value5.6 s
53/100
10%
Value120 ms
97/100
30%
Value0.019
100/100
15%
Value7.3 s
50/100
10%
349 ms
742 ms
730 ms
717 ms
722 ms
Our browser made a total of 248 requests to load all elements on the main page. We found that 0% of them (1 request) were addressed to the original Cbox.cz, 21% (51 requests) were made to Cdn.i0.cz and 13% (32 requests) were made to I0.cz. The less responsive or slowest element that took the longest time to load (2.3 sec) relates to the external source Cdn.i0.cz.
Page size can be reduced by 808.0 kB (46%)
1.8 MB
958.5 kB
In fact, the total size of Cbox.cz 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. 65% of websites need less resources to load. Javascripts take 951.6 kB which makes up the majority of the site volume.
Potential reduce by 101.8 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 101.8 kB or 77% of the original size.
Potential reduce by 32.6 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. Cbox images are well optimized though.
Potential reduce by 595.3 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 595.3 kB or 63% of the original size.
Potential reduce by 78.2 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. Cbox.cz needs all CSS files to be minified and compressed as it can save up to 78.2 kB or 88% of the original size.
Number of requests can be reduced by 117 (51%)
229
112
The browser has sent 229 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cbox. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 60 to 1 for JavaScripts and as a result speed up the page load time.
cbox.cz
349 ms
www.centrum.cz
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cbox.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
Image elements do not have [alt] attributes
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.
cbox.cz 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
cbox.cz SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
robots.txt is not valid
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
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 Cbox.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 Cbox.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.
cbox.cz
Open Graph description is not detected on the main page of Cbox. 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: