Tools & Wizards About Us
knihkupec.com screenshot

Report Summary

  • 33

    Performance

    Renders faster than
    53% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 97

    SEO

    Google-friendlier than
    91% of websites

knihkupec.com

Knihkupec.com - internetové knihkupectví, knihy, levné knihy, online knihkupectví, učebnice

Page Load Speed

7.5 sec in total

First Response

305 ms

Resources Loaded

5.8 sec

Page Rendered

1.4 sec

knihkupec.com screenshot

About Website

Visit knihkupec.com now to see the best up-to-date Knihkupec content for Czech Republic and also check out these interesting facts you probably never knew about knihkupec.com

knihkupectví, knihkupec.com, s láskou ke knihám s nadšením pro vás, knihy skladem, expedujeme do 1 pracovního dne. Profesionální přesto lidský přístup.

Visit knihkupec.com

Key Findings

We analyzed Knihkupec.com page load time and found that the first response time was 305 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 85% of websites can load faster.

Performance Metrics

knihkupec.com performance score

33

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.5 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.5 s

0/100

25%

SI (Speed Index)

Value11.4 s

5/100

10%

TBT (Total Blocking Time)

Value520 ms

56/100

30%

CLS (Cumulative Layout Shift)

Value0.02

100/100

15%

TTI (Time to Interactive)

Value16.1 s

6/100

10%

Network Requests Diagram

knihkupec.com

305 ms

www.knihkupec.com

1495 ms

jquery-ui-1.10.4.custom.min.css

118 ms

raleway.css

235 ms

all.min.css

374 ms

Our browser made a total of 139 requests to load all elements on the main page. We found that 91% of them (126 requests) were addressed to the original Knihkupec.com, 2% (3 requests) were made to Googletagmanager.com and 1% (2 requests) were made to Foxcom.cz. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source Mapy.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 207.6 kB (15%)

Content Size

1.4 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Knihkupec.com main page is 1.4 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. 60% of websites need less resources to load. Images take 948.3 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 150.2 kB

  • Original 169.5 kB
  • After minification 167.1 kB
  • After compression 19.3 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 150.2 kB or 89% of the original size.

Image Optimization

-5%

Potential reduce by 47.6 kB

  • Original 948.3 kB
  • After minification 900.8 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. Knihkupec images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 6.1 kB

  • Original 197.2 kB
  • After minification 197.1 kB
  • After compression 191.0 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

-9%

Potential reduce by 3.7 kB

  • Original 39.5 kB
  • After minification 39.5 kB
  • After compression 35.8 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. Knihkupec.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 16 (12%)

Requests Now

134

After Optimization

118

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 134 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Knihkupec. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

knihkupec.com

knihkupec.com

305 ms

www.knihkupec.com

www.knihkupec.com

1495 ms

jquery-ui-1.10.4.custom.min.css

jquery-ui-1.10.4.custom.min.css

118 ms

raleway.css

raleway.css

235 ms

all.min.css

all.min.css

374 ms

css

css

30 ms

klient.css

klient.css

479 ms

jquery-3.6.0.min.js

jquery-3.6.0.min.js

375 ms

rc.js

rc.js

691 ms

foxcom_cookies_management.min.css

foxcom_cookies_management.min.css

521 ms

foxcom_cookies_management.min.js

foxcom_cookies_management.min.js

523 ms

jquery-ui.min.js

jquery-ui.min.js

581 ms

common.js

common.js

472 ms

aktivni_homologace.js

aktivni_homologace.js

492 ms

lowscreen.js

lowscreen.js

492 ms

srovnamepixel.js

srovnamepixel.js

699 ms

f80239ded76e7d98a094ea2445a68574

f80239ded76e7d98a094ea2445a68574

512 ms

gtm.js

gtm.js

111 ms

bg.avif

bg.avif

475 ms

3201-12.png

3201-12.png

712 ms

firm-badge.svg

firm-badge.svg

1696 ms

knihkupec-logo.png

knihkupec-logo.png

150 ms

logo.avif

logo.avif

182 ms

icon_discount_white.png

icon_discount_white.png

149 ms

icon_fire_white.png

icon_fire_white.png

184 ms

icon_attention_white.png

icon_attention_white.png

148 ms

icon_cup_white.png

icon_cup_white.png

226 ms

icon_misakulicka_white.png

icon_misakulicka_white.png

228 ms

icon_misc_white.png

icon_misc_white.png

292 ms

icon_postprice_white.png

icon_postprice_white.png

295 ms

icon_letter_white.png

icon_letter_white.png

370 ms

image.php

image.php

742 ms

cart_icon_button.png

cart_icon_button.png

373 ms

image.php

image.php

743 ms

image.php

image.php

743 ms

image.php

image.php

746 ms

image.php

image.php

749 ms

image.php

image.php

752 ms

image.php

image.php

856 ms

image.php

image.php

853 ms

image.php

image.php

859 ms

image.php

image.php

862 ms

image.php

image.php

864 ms

image.php

image.php

871 ms

image.php

image.php

1004 ms

image.php

image.php

1008 ms

image.php

image.php

1066 ms

image.php

image.php

1011 ms

image.php

image.php

1066 ms

image.php

image.php

1071 ms

image.php

image.php

1143 ms

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image.php

1140 ms

image.php

image.php

1144 ms

image.php

image.php

1199 ms

image.php

image.php

1195 ms

image.php

image.php

1203 ms

font

font

62 ms

fa-solid-900.woff

fa-solid-900.woff

1379 ms

fa-regular-400.woff

fa-regular-400.woff

1163 ms

landing

landing

126 ms

js

js

119 ms

js

js

54 ms

Raleway-Heavy.ttf

Raleway-Heavy.ttf

1262 ms

Raleway-Bold.ttf

Raleway-Bold.ttf

1335 ms

Raleway-SemiBold.ttf

Raleway-SemiBold.ttf

1369 ms

Raleway-Medium.ttf

Raleway-Medium.ttf

1165 ms

Raleway-Regular.ttf

Raleway-Regular.ttf

1333 ms

Raleway-Light.ttf

Raleway-Light.ttf

1295 ms

Raleway-ExtraLight.ttf

Raleway-ExtraLight.ttf

1194 ms

Raleway-Thin.ttf

Raleway-Thin.ttf

1260 ms

fa-brands-400.woff

fa-brands-400.woff

1366 ms

image.php

image.php

1217 ms

image.php

image.php

941 ms

image.php

image.php

945 ms

image.php

image.php

993 ms

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image.php

1004 ms

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image.php

1046 ms

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image.php

1048 ms

image.php

image.php

951 ms

image.php

image.php

1048 ms

image.php

image.php

1037 ms

image.php

image.php

1039 ms

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1085 ms

image.php

image.php

1087 ms

image.php

image.php

948 ms

image.php

image.php

1000 ms

image.php

image.php

1001 ms

image.php

image.php

953 ms

image.php

image.php

990 ms

image.php

image.php

1046 ms

image.php

image.php

980 ms

image.php

image.php

1079 ms

image.php

image.php

1080 ms

zbroj.jpg

zbroj.jpg

1110 ms

image.php

image.php

1074 ms

image.php

image.php

1077 ms

image.php

image.php

962 ms

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image.php

931 ms

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938 ms

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919 ms

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895 ms

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883 ms

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image.php

888 ms

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868 ms

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917 ms

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image.php

967 ms

image.php

image.php

870 ms

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image.php

873 ms

image.php

image.php

922 ms

image.php

image.php

868 ms

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913 ms

image.php

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894 ms

image.php

image.php

879 ms

image.php

image.php

918 ms

image.php

image.php

911 ms

image.php

image.php

829 ms

dog_wide.png

dog_wide.png

870 ms

image.php

image.php

917 ms

image.php

image.php

876 ms

image.php

image.php

926 ms

image.php

image.php

921 ms

image.php

image.php

875 ms

image.php

image.php

874 ms

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image.php

911 ms

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881 ms

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877 ms

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870 ms

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830 ms

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822 ms

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820 ms

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824 ms

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865 ms

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840 ms

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869 ms

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image.php

837 ms

image.php

image.php

766 ms

image.php

image.php

823 ms

headerpic_3_cut.avif

headerpic_3_cut.avif

811 ms

footer_k.png

footer_k.png

813 ms

Accessibility Review

knihkupec.com accessibility score

84

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

<input type="image"> elements do not have [alt] text

Best Practices

knihkupec.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

knihkupec.com SEO score

97

Search Engine Optimization Advices

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

    ISO-8859-2

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Knihkupec.com 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 Knihkupec.com main page’s claimed encoding is iso-8859-2. 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

knihkupec.com

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