Tools & Wizards About Us
cars.cz screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 71

    Accessibility

    Visual factors better than
    that of 36% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 68

    SEO

    Google-friendlier than
    28% of websites

cars.cz

CARS.CZ - nov? a ojet? auta, autobazary, autosalony, prodej vozidla

Page Load Speed

4.4 sec in total

First Response

322 ms

Resources Loaded

3.7 sec

Page Rendered

334 ms

cars.cz screenshot

About Website

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

Tis?ce aut na internetu. Autosalony a autobazary, vyhled?v?n? auta, porovn?v?n? voz?, zad?v?n? popt?vek, vkl?d?n? inzer?t?.

Visit cars.cz

Key Findings

We analyzed Cars.cz page load time and found that the first response time was 322 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

cars.cz performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value10.4 s

0/100

25%

SI (Speed Index)

Value10.6 s

7/100

10%

TBT (Total Blocking Time)

Value4,580 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.133

81/100

15%

TTI (Time to Interactive)

Value19.3 s

2/100

10%

Network Requests Diagram

cars.cz

322 ms

www.cars.cz

825 ms

comp_default.css

275 ms

siteroot.jsp

316 ms

prototype.js

529 ms

Our browser made a total of 138 requests to load all elements on the main page. We found that 65% of them (90 requests) were addressed to the original Cars.cz, 17% (23 requests) were made to Img.cars.cz and 4% (6 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source A.adactive.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 231.0 kB (25%)

Content Size

914.5 kB

After Optimization

683.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cars.cz main page is 914.5 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. 70% of websites need less resources to load. Images take 598.8 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 192.0 kB

  • Original 237.6 kB
  • After minification 234.4 kB
  • After compression 45.5 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 192.0 kB or 81% of the original size.

Image Optimization

-6%

Potential reduce by 33.0 kB

  • Original 598.8 kB
  • After minification 565.7 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. CARS images are well optimized though.

JavaScript Optimization

-8%

Potential reduce by 5.2 kB

  • Original 61.5 kB
  • After minification 61.5 kB
  • After compression 56.3 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.

CSS Optimization

-5%

Potential reduce by 761 B

  • Original 16.7 kB
  • After minification 16.7 kB
  • After compression 16.0 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. Cars.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 51 (38%)

Requests Now

135

After Optimization

84

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 135 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CARS. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 29 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

cars.cz

cars.cz

322 ms

www.cars.cz

www.cars.cz

825 ms

comp_default.css

comp_default.css

275 ms

siteroot.jsp

siteroot.jsp

316 ms

prototype.js

prototype.js

529 ms

scriptaculous.js

scriptaculous.js

322 ms

js_arrays_CZ.js

js_arrays_CZ.js

423 ms

js-arrays-mod-CZ.js

js-arrays-mod-CZ.js

490 ms

observer.js

observer.js

416 ms

searchformsupJS.js

searchformsupJS.js

527 ms

top5.jsp

top5.jsp

891 ms

adx.js

adx.js

517 ms

font-awesome.min.css

font-awesome.min.css

248 ms

builder.js

builder.js

122 ms

effects.js

effects.js

114 ms

dragdrop.js

dragdrop.js

121 ms

controls.js

controls.js

115 ms

slider.js

slider.js

117 ms

sound.js

sound.js

220 ms

gtm.js

gtm.js

62 ms

gtm.js

gtm.js

162 ms

001_37117053_01.jpg

001_37117053_01.jpg

657 ms

16992057789420.jpg

16992057789420.jpg

649 ms

1695393207105100.jpg

1695393207105100.jpg

650 ms

001_25297180_01.jpg

001_25297180_01.jpg

839 ms

001_59926956_01.jpg

001_59926956_01.jpg

839 ms

171430842831910592.jpg

171430842831910592.jpg

643 ms

792282478-1.jpg

792282478-1.jpg

645 ms

863271783-1.jpg

863271783-1.jpg

647 ms

001_27327553_09.jpg

001_27327553_09.jpg

840 ms

001_05070211_01.jpg

001_05070211_01.jpg

843 ms

001_06626535_01.jpg

001_06626535_01.jpg

844 ms

001_08337878_01.jpg

001_08337878_01.jpg

845 ms

001_21797229_01.jpg

001_21797229_01.jpg

846 ms

001_18387687_01.jpg

001_18387687_01.jpg

846 ms

001_47550955_03.jpg

001_47550955_03.jpg

847 ms

001_26643165_06.jpg

001_26643165_06.jpg

848 ms

001_25470065_01.jpg

001_25470065_01.jpg

850 ms

001_07980267_02.jpg

001_07980267_02.jpg

862 ms

001_18577804_01.jpg

001_18577804_01.jpg

872 ms

001_22644754_01.jpg

001_22644754_01.jpg

873 ms

page_bg.jpg

page_bg.jpg

111 ms

top_menu_bg.jpg

top_menu_bg.jpg

112 ms

cars_logo_new_0.png

cars_logo_new_0.png

266 ms

bgsheet.png

bgsheet.png

110 ms

iconsheet.png

iconsheet.png

533 ms

audi.gif

audi.gif

112 ms

bmw.gif

bmw.gif

265 ms

citroen.gif

citroen.gif

266 ms

fiat.gif

fiat.gif

264 ms

ford.gif

ford.gif

264 ms

hyundai2.gif

hyundai2.gif

336 ms

chevrolet2.gif

chevrolet2.gif

336 ms

kia.gif

kia.gif

336 ms

mazda2.gif

mazda2.gif

349 ms

mercedes.gif

mercedes.gif

336 ms

nissan.gif

nissan.gif

455 ms

opel.gif

opel.gif

457 ms

peugeot.gif

peugeot.gif

455 ms

renault.gif

renault.gif

457 ms

suzuki.gif

suzuki.gif

457 ms

skoda.gif

skoda.gif

637 ms

toyota.gif

toyota.gif

638 ms

vw.gif

vw.gif

639 ms

volvo.gif

volvo.gif

640 ms

avia.gif

avia.gif

640 ms

daf.gif

daf.gif

642 ms

iveco.gif

iveco.gif

833 ms

man.gif

man.gif

834 ms

mitsubishi.gif

mitsubishi.gif

835 ms

aprilia.gif

aprilia.gif

835 ms

cagiva.gif

cagiva.gif

836 ms

ducati.gif

ducati.gif

838 ms

honda.gif

honda.gif

841 ms

jawa.gif

jawa.gif

841 ms

kawasaki.gif

kawasaki.gif

842 ms

js

js

71 ms

analytics.js

analytics.js

67 ms

kentoya.gif

kentoya.gif

786 ms

ktm.gif

ktm.gif

737 ms

kymco.gif

kymco.gif

741 ms

piaggio.gif

piaggio.gif

763 ms

adjs.php

adjs.php

142 ms

tracker.js

tracker.js

1054 ms

loader.js

loader.js

394 ms

linkid.js

linkid.js

73 ms

yamaha.gif

yamaha.gif

611 ms

yuki.gif

yuki.gif

611 ms

bmc.gif

bmc.gif

609 ms

bova.gif

bova.gif

610 ms

karosa.gif

karosa.gif

928 ms

adimage.php

adimage.php

207 ms

adlog.php

adlog.php

372 ms

otokar.gif

otokar.gif

923 ms

collect

collect

30 ms

collect

collect

72 ms

001_18847127_02.jpg

001_18847127_02.jpg

566 ms

001_33840333_01.jpg

001_33840333_01.jpg

569 ms

001_05070127_01.jpg

001_05070127_01.jpg

573 ms

001_08337885_01.jpg

001_08337885_01.jpg

887 ms

001_29317824_01.jpg

001_29317824_01.jpg

890 ms

js

js

45 ms

setra.gif

setra.gif

859 ms

sor.gif

sor.gif

861 ms

adria.gif

adria.gif

860 ms

burstner.gif

burstner.gif

860 ms

caravela.gif

caravela.gif

846 ms

dethleff.gif

dethleff.gif

742 ms

hobby.gif

hobby.gif

741 ms

hymer.gif

hymer.gif

741 ms

knaus.gif

knaus.gif

740 ms

lmc.gif

lmc.gif

739 ms

morelo.gif

morelo.gif

680 ms

sdk.13baec1685caf5c6eeacde774570aa8c3314ba71.js

sdk.13baec1685caf5c6eeacde774570aa8c3314ba71.js

10 ms

pilote.gif

pilote.gif

573 ms

tabbert.gif

tabbert.gif

571 ms

weinsber.gif

weinsber.gif

571 ms

carstars4w.png

carstars4w.png

569 ms

HYUNDAI.jpg

HYUNDAI.jpg

569 ms

carstars1w.png

carstars1w.png

883 ms

CITROEN.jpg

CITROEN.jpg

698 ms

carstars3_5w.png

carstars3_5w.png

695 ms

1pixel.gif

1pixel.gif

694 ms

common_mpz_sk.gif

common_mpz_sk.gif

695 ms

partneri-denik.png

partneri-denik.png

693 ms

partneri-RB-logo.png

partneri-RB-logo.png

695 ms

combo_arrow_gray.png

combo_arrow_gray.png

691 ms

hpCarPromo.jpg

hpCarPromo.jpg

691 ms

mapa_cr_highlights.gif

mapa_cr_highlights.gif

691 ms

global-cookies.13baec1685caf5c6eeacde774570aa8c3314ba71.html

global-cookies.13baec1685caf5c6eeacde774570aa8c3314ba71.html

365 ms

collect

collect

247 ms

landing

landing

332 ms

ui-gdpr-cs-web.13baec1685caf5c6eeacde774570aa8c3314ba71.js

ui-gdpr-cs-web.13baec1685caf5c6eeacde774570aa8c3314ba71.js

280 ms

js

js

61 ms

destination

destination

61 ms

1pixel.gif

1pixel.gif

210 ms

vlm-cars.cz.png

vlm-cars.cz.png

268 ms

cpex-package.min.js

cpex-package.min.js

130 ms

Accessibility Review

cars.cz accessibility score

71

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

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

cars.cz best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

High

Missing source maps for large first-party JavaScript

SEO Factors

cars.cz SEO score

68

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

High

robots.txt is not valid

Mobile Friendly

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/).

Impact

Issue

High

Document doesn't use legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    CS

  • Encoding

    WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cars.cz can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Czech. Our system also found out that Cars.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

cars.cz

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