Report Summary

  • 62

    Performance

    Renders faster than
    77% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 62% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 89

    SEO

    Google-friendlier than
    67% of websites

lckk.cz

Literární cena Knižního klubu

Page Load Speed

1.7 sec in total

First Response

419 ms

Resources Loaded

1 sec

Page Rendered

229 ms

lckk.cz screenshot

About Website

Visit lckk.cz now to see the best up-to-date Lckk content and also check out these interesting facts you probably never knew about lckk.cz

Visit lckk.cz

Key Findings

We analyzed Lckk.cz page load time and found that the first response time was 419 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

lckk.cz performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

74/100

10%

LCP (Largest Contentful Paint)

Value11.2 s

0/100

25%

SI (Speed Index)

Value6.6 s

38/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.046

99/100

15%

TTI (Time to Interactive)

Value6.2 s

62/100

10%

Network Requests Diagram

lckk.cz

419 ms

icons.min.6176b2c1.svg

132 ms

polyfill.min.js

66 ms

app.min.1529e0fa.js

234 ms

analytics.js

11 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 80% of them (16 requests) were addressed to the original Lckk.cz, 10% (2 requests) were made to Cdn.polyfill.io and 10% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (588 ms) belongs to the original domain Lckk.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 76.2 kB (31%)

Content Size

244.5 kB

After Optimization

168.3 kB

In fact, the total size of Lckk.cz main page is 244.5 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. 20% of websites need less resources to load. Images take 130.4 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 38.2 kB

  • Original 52.2 kB
  • After minification 50.9 kB
  • After compression 14.0 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 38.2 kB or 73% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 130.4 kB
  • After minification 130.4 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. Lckk images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 38.1 kB

  • Original 61.9 kB
  • After minification 61.9 kB
  • After compression 23.8 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 38.1 kB or 61% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

17

After Optimization

17

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lckk. According to our analytics all requests are already optimized.

Accessibility Review

lckk.cz accessibility score

86

Accessibility Issues

ARIA

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.

Impact

Issue

High

[role] values are not valid

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Best Practices

lckk.cz 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

Browser errors were logged to the console

SEO Factors

lckk.cz SEO score

89

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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Lckk.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 Lckk.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

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