knihcentrum.cz Website Information

Daily Unique Visits: 3,231

Daily Page Views: 12,924

Income Per Day: $36

Estimated Value: $19,440

This website is located in Czech Republic and is using following IP address 109.233.161.2. See the complete list of popular websites hosted in Czech Republic.

knihcentrum.cz is registered under .CZ top-level domain. Please check other sites in .CZ zone.

Website knihcentrum.cz is using the following name servers:

ns.forpsi.cn
ns.forpsi.cz
ns.forpsi.us
ns.forpsi.net

and is probably hosted by Master Internet s.r.o.. See the full list of other websites hosted by Master Internet s.r.o..

The highest website knihcentrum.cz position in Alexa rank database was 16220 and the lowest rank position was 982034. Current position of knihcentrum.cz in Alexa rank database is 388375.

Desktop speed score of knihcentrum.cz (63/100) is better than the results of 39.87% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of knihcentrum.cz (97/100) is better than the results of 49.9% of other sites and means that the page is mobile-friendly.

Mobile speed score of knihcentrum.cz (48/100) is better than the results of 30.32% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

knihcentrum.cz Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

knihcentrum.cz whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

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knihcentrum.cz server information

Servers Location

knihcentrum.cz desktop page speed rank

Last tested: 2019-01-01

Desktop Speed Bad

63/100

knihcentrum.cz Desktop Speed Test Quick Summary

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knihcentrum.cz Desktop Resource Breakdown

Total Resources	150
Number of Hosts	21
Static Resources	127
JavaScript Resources	36
CSS Resources	10

knihcentrum.cz mobile page speed rank

Last tested: 2019-01-01

Mobile Speed Bad

48/100

knihcentrum.cz Mobile Speed Test Quick Summary

priority - 64Eliminate render-blocking JavaScript and CSS in above-the-fold content

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priority - 15Reduce server response time

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priority - 8Prioritize visible content

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priority - 0Minify HTML

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Minifying https://www.knihcentrum.cz/Content/jquery-ui-theme…4b0f-a913-63d55b61cf80 could save 620B (12% reduction) after compression.

knihcentrum.cz Mobile Resource Breakdown

Total Resources	145
Number of Hosts	20
Static Resources	122
JavaScript Resources	36
CSS Resources	10

knihcentrum.cz mobile page usability

Last tested: 2019-01-01

Mobile Usability Good

97/100

knihcentrum.cz Mobile Usability Test Quick Summary

priority - 2Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="/podminky-ochr…hcentrumcz-sro" class="another-topic">Zásady ochrany osobních údajů</a> is close to 1 other tap targets.

The tap target <a href="/autor/mgr-tomas-kosacik">Mgr. Tomáš Kosačík</a> and 1 others are close to other tap targets.
The tap target <a href="/obchodni-podminky">Obchodní podmínky</a> and 19 others are close to other tap targets.

knihcentrum.cz HTML validation

Errors

Bad value “\Revue” for attribute “href” on element “a”: Backslash ("\") used as path segment delimiter.

Line: 159 Column: 64 - 80
"...UM revue"><a href="\Revue">KNIHCE..."

Element “style” not allowed as child of element “form” in this context. (Suppressing further errors from this subtree.)

Line: 245 Column: 1 - 7
"...</script> <style> ...."

Attribute “pccode” not allowed on element “a” at this point.

Line: 303 Column: 9 - 93
"...> <a href="https://www.knihcentrum.cz/Knihy" pccode="book" data-product-context-id="1">Knihy<..." Line: 368 Column: 9 - 97
"...> <a href="https://www.knihcentrum.cz/Hracky-hry" pccode="toy" data-product-context-id="8">Hračky..." Line: 397 Column: 9 - 108
"...> <a href="https://www.knihcentrum.cz/allbookbazaar" pccode="bookBazaar" data-product-context-id="12">Knižn&..." Line: 447 Column: 9 - 107
"...> <a href="https://www.knihcentrum.cz/Kalendare-diare" pccode="calendar" data-product-context-id="9">Kalend..." Line: 465 Column: 9 - 99
"...> <a href="https://www.knihcentrum.cz/Audio-CD" pccode="audiocd" data-product-context-id="6">AudioC..." Line: 468 Column: 9 - 96
"...> <a href="https://www.knihcentrum.cz/E-Knihy" pccode="ebook" data-product-context-id="4">E-Knih..." Line: 471 Column: 9 - 94
"...> <a href="https://www.knihcentrum.cz/Filmy" pccode="movie" data-product-context-id="7">Filmy<..." Line: 474 Column: 9 - 99
"...> <a href="https://www.knihcentrum.cz/Mapy-atlasy" pccode="map" data-product-context-id="10">Mapy</..." Line: 477 Column: 9 - 106
"...> <a href="https://www.knihcentrum.cz/Papirnictvi" pccode="stationery" data-product-context-id="13">Pap&#2..." Line: 480 Column: 9 - 99
"...> <a href="https://www.knihcentrum.cz/Darky-tipy" pccode="gift" data-product-context-id="14">Tipy n..." Line: 483 Column: 9 - 94
"...> <a href="https://www.knihcentrum.cz/Jine" pccode="other" data-product-context-id="11">Ostatn..."

“data-*” attribute names must be XML 1.0 4th ed. plus Namespaces NCNames.

Line: 564 Column: 9 - 309
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556598.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556597.jpeg" data-iview:link="https://www.knihcentrum.cz/Kniha/stephen-king-ctyricet-let-hruzy-zivot-a-dilo-krale-hororu" class="data-iview"> ..." Line: 564 Column: 9 - 309
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556598.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556597.jpeg" data-iview:link="https://www.knihcentrum.cz/Kniha/stephen-king-ctyricet-let-hruzy-zivot-a-dilo-krale-hororu" class="data-iview"> ..." Line: 564 Column: 9 - 309
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556598.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556597.jpeg" data-iview:link="https://www.knihcentrum.cz/Kniha/stephen-king-ctyricet-let-hruzy-zivot-a-dilo-krale-hororu" class="data-iview"> ..." Line: 568 Column: 9 - 269
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556033.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556032.jpeg" data-iview:link="https://www.knihcentrum.cz/autor/mgr-tomas-kosacik" class="data-iview"> ..." Line: 568 Column: 9 - 269
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556033.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556032.jpeg" data-iview:link="https://www.knihcentrum.cz/autor/mgr-tomas-kosacik" class="data-iview"> ..." Line: 568 Column: 9 - 269
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556033.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556032.jpeg" data-iview:link="https://www.knihcentrum.cz/autor/mgr-tomas-kosacik" class="data-iview"> ..." Line: 572 Column: 9 - 263
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556878.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556877.jpeg" data-iview:link="https://www.knihcentrum.cz/saturnin-se-vraci" class="data-iview"> ..." Line: 572 Column: 9 - 263
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556878.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556877.jpeg" data-iview:link="https://www.knihcentrum.cz/saturnin-se-vraci" class="data-iview"> ..." Line: 572 Column: 9 - 263
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556878.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556877.jpeg" data-iview:link="https://www.knihcentrum.cz/saturnin-se-vraci" class="data-iview"> ..." Line: 576 Column: 9 - 275
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556584.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556583.jpeg" data-iview:link="https://www.knihcentrum.cz/knihcentrumcz-rozdava-darecky" class="data-iview"> ..." Line: 576 Column: 9 - 275
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556584.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556583.jpeg" data-iview:link="https://www.knihcentrum.cz/knihcentrumcz-rozdava-darecky" class="data-iview"> ..." Line: 576 Column: 9 - 275
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556584.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556583.jpeg" data-iview:link="https://www.knihcentrum.cz/knihcentrumcz-rozdava-darecky" class="data-iview"> ..." Line: 580 Column: 9 - 267
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556091.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556089.jpeg" data-iview:link="https://www.knihcentrum.cz/tipy-na-vanocni-darky" class="data-iview"> ..." Line: 580 Column: 9 - 267
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556091.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556089.jpeg" data-iview:link="https://www.knihcentrum.cz/tipy-na-vanocni-darky" class="data-iview"> ..." Line: 580 Column: 9 - 267
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556091.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556089.jpeg" data-iview:link="https://www.knihcentrum.cz/tipy-na-vanocni-darky" class="data-iview"> ..." Line: 584 Column: 9 - 258
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556788.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556787.jpeg" data-iview:link="https://www.knihcentrum.cz/kniha-o-pivu" class="data-iview"> ..." Line: 584 Column: 9 - 258
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556788.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556787.jpeg" data-iview:link="https://www.knihcentrum.cz/kniha-o-pivu" class="data-iview"> ..." Line: 584 Column: 9 - 258
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556788.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556787.jpeg" data-iview:link="https://www.knihcentrum.cz/kniha-o-pivu" class="data-iview"> ..." Line: 588 Column: 9 - 263
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556786.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556785.jpeg" data-iview:link="https://www.knihcentrum.cz/mych-tisic-zivotu" class="data-iview"> ..." Line: 588 Column: 9 - 263
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556786.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556785.jpeg" data-iview:link="https://www.knihcentrum.cz/mych-tisic-zivotu" class="data-iview"> ..." Line: 588 Column: 9 - 263
"...> <div data-iview:thumbnail="https://www.knihcentrum.cz/content/images/thumbs/98556786.jpeg" data-iview:image="https://www.knihcentrum.cz/content/images/thumbs/98556785.jpeg" data-iview:link="https://www.knihcentrum.cz/mych-tisic-zivotu" class="data-iview"> ..."

Duplicate ID “374583”.

Line: 4004 Column: 13 - 77
"... <div class="buttons-variants" id="374583" style="display: none;"> ..."

Bad value “\rejstrik-autoru” for attribute “href” on element “a”: Backslash ("\") used as path segment delimiter.

Line: 4125 Column: 21 - 47
"... <li><a href="\rejstrik-autoru">Rejstř..."

Warnings

Attribute “data-iview:thumbnail” is not serializable as XML 1.0.

Attribute “data-iview:image” is not serializable as XML 1.0.

Attribute “data-iview:link” is not serializable as XML 1.0.

The first occurrence of ID “374583” was here.

Line: 1134 Column: 13 - 77
"... <div class="buttons-variants" id="374583" style="display: none;"> ..."

This document appears to be written in Czech. Consider adding “lang="cs"” (or variant) to the “html” start tag.

Line: 3 Column: 16 - 29
"...TYPE html> <html class="html-home-page"> <head..."

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knihcentrum.cz Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.

knihcentrum.cz TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

KNIHCENTRUM.CZ KNIHCENTRUM.cz

knihcentrum.cz Website Information

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knihcentrum.cz desktop page speed rank

knihcentrum.cz Desktop Speed Test Quick Summary

priority - 17Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 169KiB (31% reduction).

priority - 16Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 8 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 11Reduce server response time

In our test, your server responded in 1.3 seconds.

priority - 8Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 77.2KiB (66% reduction).

priority - 6Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 2Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 6.7KiB (21% reduction).

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 2KiB (11% reduction).

priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 620B (12% reduction).

knihcentrum.cz Desktop Resource Breakdown

knihcentrum.cz mobile page speed rank

knihcentrum.cz Mobile Speed Test Quick Summary

priority - 64Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 8 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 15Reduce server response time

In our test, your server responded in 1.2 seconds.

priority - 12Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 119.8KiB (24% reduction).

priority - 9Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 8Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

priority - 8Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 76.4KiB (66% reduction).

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 6.7KiB (21% reduction).

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 2KiB (11% reduction).

priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 620B (12% reduction).

knihcentrum.cz Mobile Resource Breakdown

knihcentrum.cz mobile page usability

knihcentrum.cz Mobile Usability Test Quick Summary

priority - 2Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

knihcentrum.cz HTML validation

Errors

Bad value “\Revue” for attribute “href” on element “a”: Backslash ("\") used as path segment delimiter.

Element “style” not allowed as child of element “form” in this context. (Suppressing further errors from this subtree.)

Attribute “pccode” not allowed on element “a” at this point.

“data-*” attribute names must be XML 1.0 4th ed. plus Namespaces NCNames.

Duplicate ID “374583”.

Bad value “\rejstrik-autoru” for attribute “href” on element “a”: Backslash ("\") used as path segment delimiter.

Warnings

Attribute “data-iview:thumbnail” is not serializable as XML 1.0.