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About Website

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.

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name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

61/100

25%

SI (Speed Index)

Value3.9 s

82/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.2 s

94/100

10%

zsuniverzum.cz

454 ms

stylemainpage.css

127 ms

jscript.js

235 ms

bgrd.jpg

118 ms

header.jpg

352 ms

Our browser made a total of 21 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 (602 ms) belongs to the original domain Zsuniverzum.cz.

Content Size

296.0 kB

After Optimization

228.5 kB

In fact, the total size of Zsuniverzum.cz main page is 296.0 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. 25% of websites need less resources to load. Images take 284.4 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 5.0 kB

Original 7.3 kB
After minification 6.9 kB
After compression 2.3 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 5.0 kB or 68% of the original size.

Image Optimization

-21%

Potential reduce by 59.2 kB

Original 284.4 kB
After minification 225.2 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. Obviously, Zs Univerzum needs image optimization as it can save up to 59.2 kB or 21% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-77%

Potential reduce by 3.4 kB

Original 4.3 kB
After minification 3.2 kB
After compression 997 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 3.4 kB or 77% of the original size.

Requests Now

After Optimization

The browser has sent 20 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.

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

Language and Encoding

Language Detected

CS
Language Claimed

CS
Encoding

WINDOWS-1250

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 windows-1250. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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:

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Performance

Accessibility

Best Practices

SEO

ZŠ Univerzum - Soukromá základní škola v Praze 9 se zvláštním zřetelem na individuální zvláštnosti dětí

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)