Tools & Wizards About Us
centrum-aktivit.cz screenshot

Report Summary

  • 37

    Performance

    Renders faster than
    56% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 79% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

centrum-aktivit.cz

Online prodej sportovních potřeb pro aktivní trávení volného času | Centrum-Aktivit.cz

Page Load Speed

23.1 sec in total

First Response

988 ms

Resources Loaded

21.8 sec

Page Rendered

331 ms

centrum-aktivit.cz screenshot

About Website

Visit centrum-aktivit.cz now to see the best up-to-date Centrum Aktivit content and also check out these interesting facts you probably never knew about centrum-aktivit.cz

Prodej sportovních potřeb a vybavení pro aktivní trávení volného času. Sportovní vybavení pro školy, školky, obce, sdružení a sportovní kluby.

Visit centrum-aktivit.cz

Key Findings

We analyzed Centrum-aktivit.cz page load time and found that the first response time was 988 ms and then it took 22.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

centrum-aktivit.cz performance score

37

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

29/100

10%

LCP (Largest Contentful Paint)

Value10.1 s

0/100

25%

SI (Speed Index)

Value8.9 s

15/100

10%

TBT (Total Blocking Time)

Value480 ms

60/100

30%

CLS (Cumulative Layout Shift)

Value0.164

72/100

15%

TTI (Time to Interactive)

Value8.6 s

37/100

10%

Network Requests Diagram

www.centrum-aktivit.cz

988 ms

screen.css

187 ms

analytics.js

192 ms

loadJs.php

475 ms

private_jquery.autocomplete.js

193 ms

Our browser made a total of 121 requests to load all elements on the main page. We found that 93% of them (113 requests) were addressed to the original Centrum-aktivit.cz, 2% (3 requests) were made to Google-analytics.com and 2% (2 requests) were made to Apis.google.com. The less responsive or slowest element that took the longest time to load (19.8 sec) relates to the external source Toplist.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 278.8 kB (16%)

Content Size

1.8 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Centrum-aktivit.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. 50% of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-92%

Potential reduce by 176.3 kB

  • Original 192.5 kB
  • After minification 134.0 kB
  • After compression 16.2 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. This page needs HTML code to be minified as it can gain 58.5 kB, which is 30% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 176.3 kB or 92% of the original size.

Image Optimization

-7%

Potential reduce by 97.0 kB

  • Original 1.5 MB
  • After minification 1.4 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. Centrum Aktivit images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 711 B

  • Original 100.6 kB
  • After minification 100.6 kB
  • After compression 99.9 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.

CSS Optimization

-21%

Potential reduce by 4.7 kB

  • Original 22.8 kB
  • After minification 22.8 kB
  • After compression 18.0 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. Centrum-aktivit.cz needs all CSS files to be minified and compressed as it can save up to 4.7 kB or 21% of the original size.

Requests Breakdown

Number of requests can be reduced by 51 (43%)

Requests Now

118

After Optimization

67

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 118 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centrum Aktivit. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.centrum-aktivit.cz

www.centrum-aktivit.cz

988 ms

screen.css

screen.css

187 ms

analytics.js

analytics.js

192 ms

loadJs.php

loadJs.php

475 ms

private_jquery.autocomplete.js

private_jquery.autocomplete.js

193 ms

jquery.fancybox.css

jquery.fancybox.css

193 ms

jquery-ui.css

jquery-ui.css

198 ms

anythingslider.css

anythingslider.css

281 ms

plusone.js

plusone.js

20 ms

ga.js

ga.js

7 ms

__utm.gif

__utm.gif

11 ms

__utm.gif

__utm.gif

13 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

9 ms

top-menu.png

top-menu.png

233 ms

arrow.png

arrow.png

234 ms

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head-shopping-basket.png

233 ms

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236 ms

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234 ms

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search.png

234 ms

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235 ms

logo-centrum-aktivit.png

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237 ms

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236 ms

arrow2.png

arrow2.png

238 ms

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238 ms

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238 ms

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282 ms

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284 ms

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284 ms

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1072 ms

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844 ms

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490 ms

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374 ms

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376 ms

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746 ms

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469 ms

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565 ms

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587 ms

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657 ms

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658 ms

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686 ms

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793 ms

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752 ms

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784 ms

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839 ms

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878 ms

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922 ms

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947 ms

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gjs.php

154 ms

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758 ms

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775 ms

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802 ms

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828 ms

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koste-na-dvorce-kunststoff-v-alu-ramu-sire-270cm-w210-cfff.JPG

848 ms

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koste-na-dvorce-dratene-m200-sire-200-cm-w210-cfff.JPG

885 ms

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gala-bv5481s-volleyball-10-volejbalovy-mic-jump-w210-cfff.JPG

909 ms

ccm-resistance-300-hokejova-helma-2-w210-cfff.JPG

ccm-resistance-300-hokejova-helma-2-w210-cfff.JPG

942 ms

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979 ms

bosport-nahradni-plexi-pro-mrizku-uniplexi-convex-w210-cfff.jpg

bosport-nahradni-plexi-pro-mrizku-uniplexi-convex-w210-cfff.jpg

929 ms

unisex-svetr-norlender-narvik-norsky-vzor-w210-cfff.png

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1032 ms

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1007 ms

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bunda-damska-progress-andina-softshell-cerna-w210-cfff.jpg

955 ms

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bunda-damska-loap-talla-zelena-w210-cfff.jpg

977 ms

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ccm-resistance-combo-hokejova-helma-s-mrizkou-w210-cfff.JPG

1019 ms

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count.asp

438 ms

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19754 ms

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979 ms

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ccm-rbz-110-sr-hokejove-kalhoty-w210-cfff.JPG

1013 ms

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953 ms

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978 ms

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1006 ms

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830 ms

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zinenka-combi-244-x-122-x-5-cm-protiskluzna-navaznost-suchymi-zipy-w210-cfff.JPG

965 ms

nahravaci-stroj-tutor-plus-model-3-w210-cfff.JPG

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965 ms

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916 ms

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857 ms

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917 ms

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841 ms

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886 ms

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843 ms

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853 ms

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828 ms

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879 ms

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819 ms

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803 ms

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783 ms

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755 ms

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758 ms

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761 ms

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755 ms

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757 ms

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747 ms

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719 ms

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716 ms

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723 ms

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734 ms

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711 ms

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686 ms

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687 ms

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693 ms

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715 ms

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702 ms

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661 ms

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footer-box-heading-r.png

634 ms

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630 ms

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624 ms

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628 ms

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603 ms

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592 ms

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590 ms

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566 ms

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565 ms

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583 ms

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587 ms

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574 ms

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573 ms

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572 ms

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566 ms

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567 ms

print.css

print.css

95 ms

Accessibility Review

centrum-aktivit.cz accessibility score

92

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

centrum-aktivit.cz best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

centrum-aktivit.cz SEO score

69

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Centrum-aktivit.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 Centrum-aktivit.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.

Social Sharing Optimization

centrum-aktivit.cz

Open Graph description is not detected on the main page of Centrum Aktivit. 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: