Tools & Wizards About Us
superkola.cz screenshot

Report Summary

  • 40

    Performance

    Renders faster than
    60% of other websites

  • 52

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

superkola.cz

Zimní a letní pneu, alu disky a elektrony, pneubazar - Superkola.cz

Page Load Speed

8 sec in total

First Response

882 ms

Resources Loaded

6.7 sec

Page Rendered

472 ms

superkola.cz screenshot

About Website

Welcome to superkola.cz homepage info - get ready to check Superkola best content for Czech Republic right away, or after learning these important things about superkola.cz

Nabízíme prodej nových i použitých pneumatik a ALU disků ihned k odběru. Skladem máme přes 10 000 položek.

Visit superkola.cz

Key Findings

We analyzed Superkola.cz page load time and found that the first response time was 882 ms and then it took 7.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

superkola.cz performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

55/100

10%

LCP (Largest Contentful Paint)

Value11.5 s

0/100

25%

SI (Speed Index)

Value6.2 s

44/100

10%

TBT (Total Blocking Time)

Value670 ms

44/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value11.3 s

19/100

10%

Network Requests Diagram

superkola.cz

882 ms

www.superkola.cz

791 ms

screen.css

314 ms

thickbox.css

284 ms

jquery.js

425 ms

Our browser made a total of 63 requests to load all elements on the main page. We found that 95% of them (60 requests) were addressed to the original Superkola.cz, 3% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Stats.profistranky.cz. The less responsive or slowest element that took the longest time to load (3.8 sec) belongs to the original domain Superkola.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 100.3 kB (21%)

Content Size

476.3 kB

After Optimization

376.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Superkola.cz main page is 476.3 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 357.4 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 34.3 kB

  • Original 40.8 kB
  • After minification 38.3 kB
  • After compression 6.5 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 34.3 kB or 84% of the original size.

Image Optimization

-8%

Potential reduce by 26.8 kB

  • Original 357.4 kB
  • After minification 330.6 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. Superkola images are well optimized though.

JavaScript Optimization

-41%

Potential reduce by 24.7 kB

  • Original 59.9 kB
  • After minification 56.4 kB
  • After compression 35.2 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 24.7 kB or 41% of the original size.

CSS Optimization

-80%

Potential reduce by 14.5 kB

  • Original 18.2 kB
  • After minification 14.4 kB
  • After compression 3.7 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. Superkola.cz needs all CSS files to be minified and compressed as it can save up to 14.5 kB or 80% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

46

After Optimization

46

  • Images
  • JavaScript
  • CSS

The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Superkola. According to our analytics all requests are already optimized.

Network Requests Diagram

superkola.cz

superkola.cz

882 ms

www.superkola.cz

www.superkola.cz

791 ms

screen.css

screen.css

314 ms

thickbox.css

thickbox.css

284 ms

jquery.js

jquery.js

425 ms

thickbox.js

thickbox.js

1018 ms

produkt_16743_miniatura.jpg

produkt_16743_miniatura.jpg

159 ms

produkt_22632_miniatura.jpg

produkt_22632_miniatura.jpg

303 ms

produkt_21798_miniatura.jpg

produkt_21798_miniatura.jpg

308 ms

produkt_22631_miniatura.jpg

produkt_22631_miniatura.jpg

305 ms

produkt_13400_miniatura.jpg

produkt_13400_miniatura.jpg

331 ms

produkt_17091_miniatura.jpg

produkt_17091_miniatura.jpg

307 ms

produkt_9486_miniatura.jpg

produkt_9486_miniatura.jpg

303 ms

produkt_22375_miniatura.jpg

produkt_22375_miniatura.jpg

447 ms

produkt_10111_miniatura.jpg

produkt_10111_miniatura.jpg

459 ms

produkt_1126_miniatura.jpg

produkt_1126_miniatura.jpg

465 ms

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453 ms

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produkt_1167_miniatura.jpg

452 ms

produkt_4123_miniatura.jpg

produkt_4123_miniatura.jpg

478 ms

produkt_19436_miniatura.jpg

produkt_19436_miniatura.jpg

602 ms

bg.gif

bg.gif

160 ms

page.gif

page.gif

137 ms

header.png

header.png

3800 ms

logo.png

logo.png

405 ms

login.gif

login.gif

277 ms

katalog_pozadi.gif

katalog_pozadi.gif

298 ms

vyhledavani.gif

vyhledavani.gif

309 ms

katalog.gif

katalog.gif

313 ms

menu-button.gif

menu-button.gif

416 ms

katalog_paticka.gif

katalog_paticka.gif

445 ms

login_pozadi.gif

login_pozadi.gif

634 ms

menu.gif

menu.gif

472 ms

h1.gif

h1.gif

548 ms

ikona_detail.gif

ikona_detail.gif

559 ms

ikona_kosik.gif

ikona_kosik.gif

599 ms

kosik.gif

kosik.gif

626 ms

kosik_pozadi.gif

kosik_pozadi.gif

1182 ms

kos.gif

kos.gif

848 ms

statistiky.gif

statistiky.gif

738 ms

statistiky_nejprodavanejsi.gif

statistiky_nejprodavanejsi.gif

780 ms

prava_paticka.gif

prava_paticka.gif

781 ms

statistiky_nejnovejsi.gif

statistiky_nejnovejsi.gif

874 ms

partnerske_weby.gif

partnerske_weby.gif

936 ms

paticka.gif

paticka.gif

1452 ms

ga.js

ga.js

6 ms

pocitadlo.php

pocitadlo.php

900 ms

__utm.gif

__utm.gif

11 ms

loadingAnimation.gif

loadingAnimation.gif

929 ms

produkt_16743_miniatura.jpg

produkt_16743_miniatura.jpg

1041 ms

produkt_22632_miniatura.jpg

produkt_22632_miniatura.jpg

983 ms

produkt_9486_miniatura.jpg

produkt_9486_miniatura.jpg

842 ms

produkt_22631_miniatura.jpg

produkt_22631_miniatura.jpg

1102 ms

produkt_21798_miniatura.jpg

produkt_21798_miniatura.jpg

1170 ms

produkt_17091_miniatura.jpg

produkt_17091_miniatura.jpg

1733 ms

produkt_13400_miniatura.jpg

produkt_13400_miniatura.jpg

1264 ms

produkt_22375_miniatura.jpg

produkt_22375_miniatura.jpg

1242 ms

produkt_1167_miniatura.jpg

produkt_1167_miniatura.jpg

1893 ms

produkt_21937_miniatura.jpg

produkt_21937_miniatura.jpg

1314 ms

produkt_10111_miniatura.jpg

produkt_10111_miniatura.jpg

1446 ms

produkt_1126_miniatura.jpg

produkt_1126_miniatura.jpg

1514 ms

produkt_4123_miniatura.jpg

produkt_4123_miniatura.jpg

1713 ms

produkt_19436_miniatura.jpg

produkt_19436_miniatura.jpg

1461 ms

print.css

print.css

157 ms

Accessibility Review

superkola.cz accessibility score

52

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.

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

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

Low

No form fields have multiple labels

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

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

superkola.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

superkola.cz SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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 Superkola.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 Superkola.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

superkola.cz

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