Access skola-vola.cz. ?koln? pot?eby - v?e pro va?e ?kol?ky

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

27/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

36/100

25%

SI (Speed Index)

Value7.9 s

22/100

10%

TBT (Total Blocking Time)

Value1,070 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.046

99/100

15%

TTI (Time to Interactive)

Value10.1 s

26/100

10%

skola-vola.cz

512 ms

www.skola-vola.cz

981 ms

gtm.js

60 ms

plusone.js

23 ms

styly.css

117 ms

Our browser made a total of 77 requests to load all elements on the main page. We found that 68% of them (52 requests) were addressed to the original Skola-vola.cz, 10% (8 requests) were made to Static.xx.fbcdn.net and 4% (3 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.5 sec) belongs to the original domain Skola-vola.cz.

Content Size

1.5 MB

After Optimization

1.4 MB

In fact, the total size of Skola-vola.cz main page is 1.5 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. 50% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 33.7 kB

Original 43.6 kB
After minification 41.9 kB
After compression 9.9 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 33.7 kB or 77% of the original size.

Image Optimization

-3%

Potential reduce by 33.2 kB

Original 1.1 MB
After minification 1.0 MB

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. S Kola Vol A images are well optimized though.

JavaScript Optimization

-16%

Potential reduce by 55.5 kB

Original 347.8 kB
After minification 347.8 kB
After compression 292.3 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 55.5 kB or 16% of the original size.

CSS Optimization

-27%

Potential reduce by 8.1 kB

Original 29.9 kB
After minification 29.9 kB
After compression 21.8 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. Skola-vola.cz needs all CSS files to be minified and compressed as it can save up to 8.1 kB or 27% of the original size.

Requests Now

After Optimization

The browser has sent 73 CSS, Javascripts, AJAX and image requests in order to completely render the main page of S Kola Vol A. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

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/).

High

Document uses legible font sizes

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 Skola-vola.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 Skola-vola.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

skola-vola.cz

Open Graph description is not detected on the main page of S Kola Vol A. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

?koln? pot?eby - v?e pro va?e ?kol?ky - ?kola-vol?.cz

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)

Network Requests Diagram

skola-vola.cz

www.skola-vola.cz

gtm.js

plusone.js

styly.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

skola-vola.cz

www.skola-vola.cz

gtm.js

plusone.js

styly.css

screen.css

jquery.js

script_shop.js

script_jq.js

library.js

cb=gapi.loaded_0

5d56e74ca0440aa50cf7c7d028575997.js

js

analytics.js

destination

collect

landing

likebox.php

pozadi.png

740x300_frixion_family.jpg

740x300_skolni_sesity.jpg

uvod-happy-liner.jpg

uvod-Tombow_banner.jpg

uvod-batohy.png

uvod-lahve.gif

uvod-boxy.gif

skolni-batoh-fotbal-blackx.jpg

penal-monster-jam-546x.jpg

batoh-do-skoly-hit-149-a2-blackx.jpg

sesit-skolni-512-10-listux.jpg

tornado-4775-coolx.jpg

nuzky-leitz(1).png

ca0d3abf7f0fe4b5a9619c8f72daec05.jpg

kosik10.gif

f6ff9754fb902630578c075bc29c8721.jpg

0dfbae67b6b666708a8ff7978144fa43.jpg

hvezdicka.gif

c61183f433706af0fb0316015f7d84a9.jpg

1958700224f8f5c6bfd3220bb72bfd8c.jpg

105a7fa479e2a28522495640d948bd2e.jpg

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