Access knihy.tyden.cz. Booktook.cz | online knihkupectví

name

value

score

weighting

FCP (First Contentful Paint)

Value7.1 s

1/100

10%

LCP (Largest Contentful Paint)

Value12.2 s

0/100

25%

SI (Speed Index)

Value9.4 s

12/100

10%

TBT (Total Blocking Time)

Value3,020 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.241

52/100

15%

TTI (Time to Interactive)

Value13.8 s

10/100

10%

knihy.tyden.cz

600 ms

css

26 ms

jquery.min.js

12 ms

jquery-ui.min.js

18 ms

css.php

555 ms

Our browser made a total of 79 requests to load all elements on the main page. We found that 39% of them (31 requests) were addressed to the original Knihy.tyden.cz, 24% (19 requests) were made to Static.knihy.tyden.cz and 6% (5 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source Static.knihy.tyden.cz.

Content Size

1.2 MB

After Optimization

894.4 kB

In fact, the total size of Knihy.tyden.cz main page is 1.2 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. 50% of websites need less resources to load. Images take 851.3 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 52.4 kB

Original 65.3 kB
After minification 58.6 kB
After compression 12.9 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 52.4 kB or 80% of the original size.

Image Optimization

-8%

Potential reduce by 64.6 kB

Original 851.3 kB
After minification 786.7 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. Knihy Tyden images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 118.8 kB

Original 193.9 kB
After minification 192.8 kB
After compression 75.1 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 118.8 kB or 61% of the original size.

CSS Optimization

-80%

Potential reduce by 78.9 kB

Original 98.7 kB
After minification 96.6 kB
After compression 19.7 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. Knihy.tyden.cz needs all CSS files to be minified and compressed as it can save up to 78.9 kB or 80% of the original size.

Requests Now

After Optimization

The browser has sent 76 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Knihy Tyden. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

ARIA input fields do not have accessible names

High

ARIA toggle fields do not have accessible names

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

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.

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

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/).

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Knihy.tyden.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 Knihy.tyden.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

knihy.tyden.cz

Open Graph data is detected on the main page of Knihy Tyden. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

Booktook.cz | online knihkupectví - 90 000 titulů skladem

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

knihy.tyden.cz

css

jquery.min.js

jquery-ui.min.js

css.php

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

knihy.tyden.cz

css

jquery.min.js

jquery-ui.min.js

css.php

js.php

js.php

search-submit.png

small-basket.png

blank.gif

grey-KT.jpg

sex-v-hlase.jpg

saudek-790.jpg

knizni-ctvrtek-leden-2016.jpg

youtuber.jpg

travel-bible.jpg

40-dni-pesky.jpg

anatomie.jpg

kafe-a-cigarko.jpg

a120abd0963517a511da9634362f13facda08b66.jpg

65b3137c37f83b724980ec7b8c79fdbf7a1ee438.jpg

082fe9c1b4aaf70dfe89201ef0905064fdafaf3f.jpg

c029dbdcdaeac09de94e5d78c9a713142dc94a23.jpg

d42c60e8d1b05a9313035f23007b62f366ec7709.jpg

1939f256887c280c9fbdad0b1533c66f44efe0f3.jpg

f06f3880934170ed0662711bbacc57a640c4ca13.jpg

f0cc9814c554da3a7cd8d8f8c2dbe6fcd2d6526a.jpg

527701bd332c07c9caa05b678a1de8b2574d5c4a.jpg

gtm.js

wrapper.png

nav.png

logo.png

ico-home.png

ico-dropdown-arrow.png

ul-01.png

ico-telefon.png

ico-email.png

search-input.png

basket.png

bg_button.png

starburst.png

dot-h.png

new.png