Tools & Wizards About Us
centrshop.cz screenshot

Report Summary

  • 57

    Performance

    Renders faster than
    73% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

centrshop.cz

kancel??ksk? pot?eby, ?koln? pot?eby, tiskopisy, pap?rnictv? online, pap?rnictv? eshop

Page Load Speed

5.3 sec in total

First Response

397 ms

Resources Loaded

4.6 sec

Page Rendered

331 ms

centrshop.cz screenshot

About Website

Click here to check amazing Centrshop content for Czech Republic. Otherwise, check out these important facts you probably never knew about centrshop.cz

Nab?z?me ?koln? i kancel??sk? pot?eby, um?leck? pot?eby, batohy, pen?ly, pouzdra a etue, tiskopisy, ?anony, a po?ada?eD?le i produkty zna?ek Kooh-i-noor, Maped, Balou?ek tisk, Asopol, Pentel nebo Pilo...

Visit centrshop.cz

Key Findings

We analyzed Centrshop.cz page load time and found that the first response time was 397 ms and then it took 4.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

centrshop.cz performance score

57

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value4.8 s

30/100

25%

SI (Speed Index)

Value6.7 s

36/100

10%

TBT (Total Blocking Time)

Value310 ms

77/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.6 s

57/100

10%

Network Requests Diagram

centrshop.cz

397 ms

centrshop.cz

388 ms

1165 ms

css

32 ms

styles.php

192 ms

Our browser made a total of 78 requests to load all elements on the main page. We found that 79% of them (62 requests) were addressed to the original Centrshop.cz, 17% (13 requests) were made to Embed.tawk.to and 3% (2 requests) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Centrshop.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 265.0 kB (18%)

Content Size

1.5 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Centrshop.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. 40% of websites need less resources to load. Images take 923.8 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 211.5 kB

  • Original 237.3 kB
  • After minification 178.3 kB
  • After compression 25.8 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 59.0 kB, which is 25% 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 211.5 kB or 89% of the original size.

Image Optimization

-2%

Potential reduce by 18.9 kB

  • Original 923.8 kB
  • After minification 904.9 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. Centrshop images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 33.7 kB

  • Original 329.9 kB
  • After minification 329.2 kB
  • After compression 296.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-14%

Potential reduce by 819 B

  • Original 5.9 kB
  • After minification 5.9 kB
  • After compression 5.1 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. Centrshop.cz needs all CSS files to be minified and compressed as it can save up to 819 B or 14% of the original size.

Requests Breakdown

Number of requests can be reduced by 26 (35%)

Requests Now

74

After Optimization

48

  • Images
  • JavaScript
  • CSS

The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centrshop. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

centrshop.cz

centrshop.cz

397 ms

centrshop.cz

centrshop.cz

388 ms

1165 ms

css

css

32 ms

styles.php

styles.php

192 ms

highslide.css

highslide.css

95 ms

jquery.min.js

jquery.min.js

18 ms

jquery-ui.min.js

jquery-ui.min.js

23 ms

scripts.js.php

scripts.js.php

188 ms

js-scripts.js

js-scripts.js

466 ms

jssor.slider.mini.js

jssor.slider.mini.js

371 ms

highslide-with-html.js.php

highslide-with-html.js.php

473 ms

prettyPhoto.css

prettyPhoto.css

282 ms

jquery.prettyPhoto.js

jquery.prettyPhoto.js

284 ms

pretty-photo-config.js

pretty-photo-config.js

283 ms

slider.js

slider.js

371 ms

user_icon.png

user_icon.png

94 ms

centrshop_papirnictvi.png

centrshop_papirnictvi.png

184 ms

basket_top_white.png

basket_top_white.png

95 ms

search_icon.png

search_icon.png

96 ms

plus.png

plus.png

94 ms

_thb_200624001008.jpg

_thb_200624001008.jpg

188 ms

_thb_9935s05001ps.jpg

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186 ms

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187 ms

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_thb_4006381398671.jpg

190 ms

_thb_bob200695009000.jpg

_thb_bob200695009000.jpg

191 ms

loading.gif

loading.gif

276 ms

4b19532ec249e76c5f24137e9a0d925b.jpg

4b19532ec249e76c5f24137e9a0d925b.jpg

781 ms

5e3b85becd9242029c8ff37a3464da9b.jpg

5e3b85becd9242029c8ff37a3464da9b.jpg

461 ms

54d0c30b2d38cfb4c8921ca7fae055f4.jpg

54d0c30b2d38cfb4c8921ca7fae055f4.jpg

375 ms

4c0eba1fe77dca35499f9e2633690c2f.jpg

4c0eba1fe77dca35499f9e2633690c2f.jpg

370 ms

b05.png

b05.png

280 ms

a12.png

a12.png

368 ms

_thb_01447241200.jpg

_thb_01447241200.jpg

373 ms

basket_icon_black.png

basket_icon_black.png

462 ms

_thb_200155007615.jpg

_thb_200155007615.jpg

464 ms

_thb_200624002000.jpg

_thb_200624002000.jpg

466 ms

_thb_200624002010.jpg

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467 ms

_thb_200697003021.jpg

_thb_200697003021.jpg

555 ms

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_thb_8591199655512.jpg

553 ms

_thb_8772012004pl.jpg

_thb_8772012004pl.jpg

557 ms

_thb_8774024004pl-1.jpg

_thb_8774024004pl-1.jpg

559 ms

_thb_dch200157006950.jpg

_thb_dch200157006950.jpg

562 ms

_thb_her60078003.jpg

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645 ms

_thb_kin013150400000.jpg

_thb_kin013150400000.jpg

646 ms

_thb_162703.jpg

_thb_162703.jpg

649 ms

_thb_kin039210400000.jpg

_thb_kin039210400000.jpg

652 ms

_thb_kin039210500000.jpg

_thb_kin039210500000.jpg

656 ms

_thb_kin6241052001kk.jpg

_thb_kin6241052001kk.jpg

738 ms

_thb_kin771002bd01te.jpg

_thb_kin771002bd01te.jpg

738 ms

_thb_9023800340108.jpg

_thb_9023800340108.jpg

741 ms

default

default

202 ms

_thb_3154141961007.jpg

_thb_3154141961007.jpg

720 ms

_thb_pb200622001050.jpg

_thb_pb200622001050.jpg

660 ms

_thb_5904017046332.jpg

_thb_5904017046332.jpg

741 ms

_thb_4902505356070.jpg

_thb_4902505356070.jpg

742 ms

_thb_mfp2010687.jpg

_thb_mfp2010687.jpg

743 ms

_thb_mfp6200241.jpg

_thb_mfp6200241.jpg

659 ms

ico_print.gif

ico_print.gif

661 ms

ico-pp.gif

ico-pp.gif

687 ms

sipka_nahoru.png

sipka_nahoru.png

739 ms

print.css

print.css

95 ms

mobil.php

mobil.php

97 ms

twk-arr-find-polyfill.js

twk-arr-find-polyfill.js

163 ms

twk-object-values-polyfill.js

twk-object-values-polyfill.js

183 ms

twk-event-polyfill.js

twk-event-polyfill.js

66 ms

twk-entries-polyfill.js

twk-entries-polyfill.js

64 ms

twk-iterator-polyfill.js

twk-iterator-polyfill.js

183 ms

twk-promise-polyfill.js

twk-promise-polyfill.js

59 ms

twk-main.js

twk-main.js

112 ms

twk-vendor.js

twk-vendor.js

164 ms

twk-chunk-vendors.js

twk-chunk-vendors.js

191 ms

twk-chunk-common.js

twk-chunk-common.js

239 ms

twk-runtime.js

twk-runtime.js

217 ms

twk-app.js

twk-app.js

229 ms

drop-shadow.png

drop-shadow.png

96 ms

zoomout.cur

zoomout.cur

95 ms

loader.white.gif

loader.white.gif

96 ms

Accessibility Review

centrshop.cz accessibility score

69

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

centrshop.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

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

centrshop.cz SEO score

90

Search Engine Optimization Advices

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

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 uses legible font sizes

High

Tap targets are not sized appropriately

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 Centrshop.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 Centrshop.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

centrshop.cz

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