3.3 sec in total
371 ms
2.5 sec
411 ms
Click here to check amazing Cez content for Czech Republic. Otherwise, check out these important facts you probably never knew about cez.cz
Skupina ČEZ patří mezi nejvýznamnější výrobce, distributory, obchodníky v oblasti elektřiny a tepla, zemního plynu.
Visit cez.czWe analyzed Cez.cz page load time and found that the first response time was 371 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.
cez.cz performance score
name
value
score
weighting
Value6.4 s
2/100
10%
Value17.4 s
0/100
25%
Value10.7 s
7/100
10%
Value910 ms
31/100
30%
Value0
100/100
15%
Value16.9 s
5/100
10%
371 ms
531 ms
241 ms
594 ms
843 ms
Our browser made a total of 37 requests to load all elements on the main page. We found that 54% of them (20 requests) were addressed to the original Cez.cz, 8% (3 requests) were made to C.imedia.cz and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (843 ms) belongs to the original domain Cez.cz.
Page size can be reduced by 94.5 kB (11%)
876.1 kB
781.7 kB
In fact, the total size of Cez.cz main page is 876.1 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. 30% of websites need less resources to load. Images take 777.1 kB which makes up the majority of the site volume.
Potential reduce by 36.3 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 36.3 kB or 79% of the original size.
Potential reduce by 26.1 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. Cez images are well optimized though.
Potential reduce by 32.0 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 32.0 kB or 60% of the original size.
Number of requests can be reduced by 18 (53%)
34
16
The browser has sent 34 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cez. 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 as a result speed up the page load time.
cez.cz
371 ms
www.cez.cz
531 ms
maintenance.js
241 ms
web.css
594 ms
web.js
843 ms
jquery-ui.css
119 ms
jquery.ui.datepicker.css
122 ms
gtm.js
43 ms
bg-sodmenou.jpg
723 ms
bg-tablet-sodmenou.jpg
611 ms
logo.png
349 ms
sprites.png
716 ms
xs-logo.png
349 ms
col-visual.png
349 ms
landing-pod-15.jpg
707 ms
fotovoltaika_banner455x192.jpg
718 ms
cez_mobil_2016_455x192_hpwebcez.jpg
457 ms
virtual-eds-nahled.jpg
576 ms
2016-02-03_cez_ebus_nahled.jpg
811 ms
analytics.js
24 ms
conversion_async.js
15 ms
48 ms
collect
13 ms
collect
60 ms
50 ms
35 ms
monkeytracker.min.js
387 ms
retargeting.js
232 ms
chat.json
488 ms
preloader2.gif
493 ms
retargeting
122 ms
437 ms
fbds.js
136 ms
src=4799305;type=invmedia;cat=8wvxuyhl;ord=8149540007580.071
60 ms
retargeting
202 ms
97 ms
119 ms
cez.cz accessibility score
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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
cez.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
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
cez.cz SEO score
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 Cez.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 Cez.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.
cez.cz
Open Graph description is not detected on the main page of Cez. 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: