Tools & Wizards About Us
cbn.cz screenshot

Report Summary

  • 55

    Performance

    Renders faster than
    72% of other websites

  • 75

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

cbn.cz

Ruční nářadí, nářadí Knipex, nářadí pro instalatéry, elektrikáře i kutily

Page Load Speed

7 sec in total

First Response

1.3 sec

Resources Loaded

4.9 sec

Page Rendered

891 ms

cbn.cz screenshot

About Website

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

Pestrá nabídka ručního nářadí, kleští Knipex, řezných, brusných kotoučů nejen pro profíky za skvělé ceny. Ušetřete s námi!

Visit cbn.cz

Key Findings

We analyzed Cbn.cz page load time and found that the first response time was 1.3 sec and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

cbn.cz performance score

55

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

22/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

49/100

25%

SI (Speed Index)

Value5.3 s

58/100

10%

TBT (Total Blocking Time)

Value540 ms

54/100

30%

CLS (Cumulative Layout Shift)

Value0.045

99/100

15%

TTI (Time to Interactive)

Value8.9 s

35/100

10%

Network Requests Diagram

www.cbn.cz

1263 ms

langCode.CZE.cs.FFC74FFFFFFFF7F7F74CA9EEFC87022F3942FFE8A5.snapshot.false.screen.css

530 ms

cookiecontrol.css

220 ms

shp.js

555 ms

shp.js.aspx

728 ms

Our browser made a total of 136 requests to load all elements on the main page. We found that 56% of them (76 requests) were addressed to the original Cbn.cz, 18% (24 requests) were made to Static.xx.fbcdn.net and 6% (8 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Cbn.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 248.3 kB (31%)

Content Size

794.0 kB

After Optimization

545.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cbn.cz main page is 794.0 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. 70% of websites need less resources to load. Images take 601.3 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 80.6 kB

  • Original 104.2 kB
  • After minification 95.9 kB
  • After compression 23.6 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 80.6 kB or 77% of the original size.

Image Optimization

-18%

Potential reduce by 111.0 kB

  • Original 601.3 kB
  • After minification 490.3 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, Cbn needs image optimization as it can save up to 111.0 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-64%

Potential reduce by 55.1 kB

  • Original 86.0 kB
  • After minification 66.1 kB
  • After compression 30.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 55.1 kB or 64% of the original size.

CSS Optimization

-67%

Potential reduce by 1.6 kB

  • Original 2.4 kB
  • After minification 1.8 kB
  • After compression 811 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. Cbn.cz needs all CSS files to be minified and compressed as it can save up to 1.6 kB or 67% of the original size.

Requests Breakdown

Number of requests can be reduced by 52 (39%)

Requests Now

132

After Optimization

80

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 132 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cbn. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.cbn.cz

www.cbn.cz

1263 ms

langCode.CZE.cs.FFC74FFFFFFFF7F7F74CA9EEFC87022F3942FFE8A5.snapshot.false.screen.css

langCode.CZE.cs.FFC74FFFFFFFF7F7F74CA9EEFC87022F3942FFE8A5.snapshot.false.screen.css

530 ms

cookiecontrol.css

cookiecontrol.css

220 ms

shp.js

shp.js

555 ms

shp.js.aspx

shp.js.aspx

728 ms

lang.js.aspx

lang.js.aspx

1243 ms

xmenu.js

xmenu.js

325 ms

ajax.js

ajax.js

427 ms

jquery-1.6.3.min.js

jquery-1.6.3.min.js

17 ms

cookiecontrol.js

cookiecontrol.js

436 ms

plusone.js

plusone.js

64 ms

footer.css

footer.css

233 ms

conversion.js

conversion.js

17 ms

cb=gapi.loaded_0

cb=gapi.loaded_0

8 ms

all.js

all.js

35 ms

bg_cbn.jpg

bg_cbn.jpg

578 ms

kosik.png

kosik.png

136 ms

langCode.CZE.cs.FFC74FFFFFFFF7F7F74CA9EEFC87022F3942FFE8A5.snapshot.false.screen.css

langCode.CZE.cs.FFC74FFFFFFFF7F7F74CA9EEFC87022F3942FFE8A5.snapshot.false.screen.css

934 ms

twitter.gif

twitter.gif

270 ms

menu_sep.png

menu_sep.png

129 ms

shoproku_ikona_2015-f-dilna.png

shoproku_ikona_2015-f-dilna.png

553 ms

BTok.png

BTok.png

322 ms

bt-editBasket.png

bt-editBasket.png

267 ms

bt-clearBasket.png

bt-clearBasket.png

269 ms

akce.png

akce.png

350 ms

hroty.png

hroty.png

449 ms

kotouce.png

kotouce.png

485 ms

rucni-naradi.png

rucni-naradi.png

539 ms

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13922004k.jpg

457 ms

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559 ms

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566 ms

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Kle%C5%A1t%C4%9B%20na%20kabely%209532100.jpg

617 ms

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Odizolovaci%20nastroj%20166006SB%20na%20koaxailni%20kabely.jpg

708 ms

N.gif

N.gif

920 ms

T.gif

T.gif

921 ms

Taska%20na%20naradi%20002111LE%20-%20Knipex.jpg

Taska%20na%20naradi%20002111LE%20-%20Knipex.jpg

921 ms

Kleste%20TwinForce%207272180F%20Knipex.jpg

Kleste%20TwinForce%207272180F%20Knipex.jpg

928 ms

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Kufr%20na%20naradi%20ROBUST%20Knipex%20002135LE%20-%20novinka%202014.jpg

929 ms

A.gif

A.gif

930 ms

Knipex%208603125.jpg

Knipex%208603125.jpg

932 ms

Klestovy%20klic%208603400%20Knipex.jpg

Klestovy%20klic%208603400%20Knipex.jpg

930 ms

vrtaksdsplus.jpg

vrtaksdsplus.jpg

942 ms

kotoucnad300mm-A30T.jpg

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939 ms

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940 ms

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939 ms

BTsendMail.png

BTsendMail.png

939 ms

img_865.gif

img_865.gif

941 ms

PayU_320x80_animated-banner.gif

PayU_320x80_animated-banner.gif

1062 ms

VISA.gif

VISA.gif

1047 ms

PAYcpost.png

PAYcpost.png

1049 ms

PAYhotovost.png

PAYhotovost.png

1059 ms

105 ms

ga.js

ga.js

19 ms

xd_arbiter.php

xd_arbiter.php

38 ms

xd_arbiter.php

xd_arbiter.php

113 ms

www.cbn.cz

www.cbn.cz

1102 ms

PAYprevod.png

PAYprevod.png

942 ms

Lamelovy%20kotouc%20%20115%20ZK60%20rovny%20ROTTLUFF.jpg

Lamelovy%20kotouc%20%20115%20ZK60%20rovny%20ROTTLUFF.jpg

1037 ms

__utm.gif

__utm.gif

84 ms

gjs.php

gjs.php

229 ms

98 ms

dot.asp

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219 ms

collect

collect

90 ms

diamantovy%20kotouc%20BG%20laser%20150%20mm.JPG

diamantovy%20kotouc%20BG%20laser%20150%20mm.JPG

904 ms

70071604.JPG

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898 ms

95816004k.jpg

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922 ms

35 ms

Sikovky%20250%20mm%20-%2079-250%205022.jpg

Sikovky%20250%20mm%20-%2079-250%205022.jpg

855 ms

ga-audiences

ga-audiences

17 ms

like_box.php

like_box.php

256 ms

3040-03-630_v.jpg

3040-03-630_v.jpg

932 ms

widget.php

widget.php

116 ms

Palice%201%20kg%20-%20BRINKO%201409.jpg

Palice%201%20kg%20-%20BRINKO%201409.jpg

833 ms

img_669.gif

img_669.gif

825 ms

fastCentrikSmall.png

fastCentrikSmall.png

799 ms

bg-advSearchBoxLink.png

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748 ms

title_pubnews.png

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781 ms

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819 ms

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823 ms

hDvwL1_H7g-.css

hDvwL1_H7g-.css

51 ms

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54 ms

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64 ms

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64 ms

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69 ms

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72 ms

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111 ms

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123 ms

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127 ms

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132 ms

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135 ms

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138 ms

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135 ms

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770 ms

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680 ms

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218 ms

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73 ms

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76 ms

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478 ms

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627 ms

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676 ms

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662 ms

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bg-news.png

666 ms

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685 ms

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723 ms

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905 ms

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202 ms

Accessibility Review

cbn.cz accessibility score

75

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

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

High

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

cbn.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

High

Page has valid source maps

SEO Factors

cbn.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 Cbn.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 Cbn.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

cbn.cz

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