3.5 sec in total
397 ms
3 sec
104 ms
Welcome to zsuniverzum.cz homepage info - get ready to check Zs Univerzum best content right away, or after learning these important things about zsuniverzum.cz
Škola zabezpečuje komplexní základní vzdělání. Vlastní jazyková koncepce orientující nadané žáky na intenzivní výuku anglického jazyka s cílem složení zkoušek ve formě certifikátu Cambridge ESOL.
Visit zsuniverzum.czWe analyzed Zsuniverzum.cz page load time and found that the first response time was 397 ms and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
zsuniverzum.cz performance score
name
value
score
weighting
Value2.8 s
57/100
10%
Value3.5 s
64/100
25%
Value3.9 s
82/100
10%
Value60 ms
100/100
30%
Value0
100/100
15%
Value3.0 s
96/100
10%
397 ms
385 ms
776 ms
112 ms
221 ms
Our browser made a total of 24 requests to load all elements on the main page. We found that all of those requests were addressed to Zsuniverzum.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (776 ms) belongs to the original domain Zsuniverzum.cz.
Page size can be reduced by 21.7 kB (5%)
431.1 kB
409.4 kB
In fact, the total size of Zsuniverzum.cz main page is 431.1 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. 20% of websites need less resources to load. Images take 259.3 kB which makes up the majority of the site volume.
Potential reduce by 8.5 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 8.5 kB or 65% of the original size.
Potential reduce by 11.7 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. Zs Univerzum images are well optimized though.
Potential reduce by 1.3 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. This website has mostly compressed JavaScripts.
Potential reduce by 242 B
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. Zsuniverzum.cz needs all CSS files to be minified and compressed as it can save up to 242 B or 20% of the original size.
We found no issues to fix!
21
21
The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zs Univerzum. According to our analytics all requests are already optimized.
zsuniverzum.cz
397 ms
zsuniverzum.cz
385 ms
www.zsuniverzum.cz
776 ms
stylemainpage.css
112 ms
jscript.js
221 ms
ckeditor.js
715 ms
bgrd.jpg
113 ms
header20180520.jpg
106 ms
mainOval.jpg
105 ms
1logo_N.jpg
270 ms
2spp_N.gif
268 ms
3year_N.jpg
411 ms
4lang_N.jpg
329 ms
5galery_N.jpg
327 ms
6council_N.jpg
329 ms
7parlament_N.jpg
367 ms
8classes_N.jpg
370 ms
9login_N.jpg
433 ms
PreparationCentreLogo2.jpg
612 ms
asociace_cam_skol.jpg
532 ms
cup.jpg
472 ms
bc.jpg
471 ms
wu2.png
519 ms
printer.css
114 ms
zsuniverzum.cz accessibility score
zsuniverzum.cz best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
Serves images with low resolution
General
Impact
Issue
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
zsuniverzum.cz SEO score
CS
CS
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zsuniverzum.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 Zsuniverzum.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.
zsuniverzum.cz
Open Graph description is not detected on the main page of Zs Univerzum. 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: