Tools & Wizards About Us

Report Summary

  • 74

    Performance

    Renders faster than
    83% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

centrum-matraci.cz

Centrum Matrací!

Page Load Speed

3 sec in total

First Response

425 ms

Resources Loaded

2.4 sec

Page Rendered

140 ms

About Website

Click here to check amazing Centrum Matraci content. Otherwise, check out these important facts you probably never knew about centrum-matraci.cz

Centrum značkových zdravotních matrací a příslušenství!

Visit centrum-matraci.cz

Key Findings

We analyzed Centrum-matraci.cz page load time and found that the first response time was 425 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

centrum-matraci.cz performance score

74

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value4.0 s

50/100

25%

SI (Speed Index)

Value4.6 s

70/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.6 s

70/100

10%

Network Requests Diagram

centrum-matraci.cz

425 ms

centrum-matraci.cz

615 ms

jquery-3.6.0.js

959 ms

style_imagehover.css

771 ms

styledesign.css

772 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 83% of them (20 requests) were addressed to the original Centrum-matraci.cz, 8% (2 requests) were made to Ssl.google-analytics.com and 4% (1 request) were made to C.seznam.cz. The less responsive or slowest element that took the longest time to load (959 ms) belongs to the original domain Centrum-matraci.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 46.7 kB (14%)

Content Size

345.0 kB

After Optimization

298.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Centrum-matraci.cz main page is 345.0 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. 15% of websites need less resources to load. Javascripts take 182.7 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 14.4 kB

  • Original 20.6 kB
  • After minification 19.5 kB
  • After compression 6.2 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 14.4 kB or 70% of the original size.

Image Optimization

-22%

Potential reduce by 28.0 kB

  • Original 126.5 kB
  • After minification 98.5 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. Obviously, Centrum Matraci needs image optimization as it can save up to 28.0 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 693 B

  • Original 182.7 kB
  • After minification 182.7 kB
  • After compression 182.0 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

-23%

Potential reduce by 3.6 kB

  • Original 15.3 kB
  • After minification 14.9 kB
  • After compression 11.7 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. Centrum-matraci.cz needs all CSS files to be minified and compressed as it can save up to 3.6 kB or 23% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (48%)

Requests Now

21

After Optimization

11

  • Images
  • JavaScript
  • CSS

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centrum Matraci. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

centrum-matraci.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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

centrum-matraci.cz best practices score

75

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

High

Page has valid source maps

SEO Factors

centrum-matraci.cz SEO score

77

Search Engine Optimization Advices

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 Centrum-matraci.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 Centrum-matraci.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 Centrum Matraci. 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: