Tools & Wizards About Us
zvuk-svetla.cz screenshot

Report Summary

  • 44

    Performance

    Renders faster than
    63% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

zvuk-svetla.cz

Hudební nástroje, ozvučení a osvětlení - | ozvučení a hudebniny STEP - Petr Stejskal

Page Load Speed

6.2 sec in total

First Response

317 ms

Resources Loaded

5.4 sec

Page Rendered

420 ms

zvuk-svetla.cz screenshot

About Website

Visit zvuk-svetla.cz now to see the best up-to-date Zvuk Svetla content for Czech Republic and also check out these interesting facts you probably never knew about zvuk-svetla.cz

Najdete u nás hudební nástroje, ozvučení, světelné efekty a vybavení pro DJs. Zboží skladem odesíláme do 1 pracovního dne. Nazvučení / nasvícení akcí.

Visit zvuk-svetla.cz

Key Findings

We analyzed Zvuk-svetla.cz page load time and found that the first response time was 317 ms and then it took 5.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

zvuk-svetla.cz performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

8/100

10%

LCP (Largest Contentful Paint)

Value8.9 s

1/100

25%

SI (Speed Index)

Value8.3 s

19/100

10%

TBT (Total Blocking Time)

Value260 ms

83/100

30%

CLS (Cumulative Layout Shift)

Value0.036

100/100

15%

TTI (Time to Interactive)

Value14.1 s

9/100

10%

Network Requests Diagram

zvuk-svetla.cz

317 ms

www.zvuk-svetla.cz

497 ms

www.zvuk-svetla.cz

1399 ms

jquery.js

304 ms

xeditormediabox.css

303 ms

Our browser made a total of 159 requests to load all elements on the main page. We found that 91% of them (144 requests) were addressed to the original Zvuk-svetla.cz, 4% (6 requests) were made to Fonts.gstatic.com and 2% (3 requests) were made to Code.jquery.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Zvuk-svetla.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 968.8 kB (48%)

Content Size

2.0 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zvuk-svetla.cz main page is 2.0 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. 70% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 108.6 kB

  • Original 121.7 kB
  • After minification 101.3 kB
  • After compression 13.1 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. This page needs HTML code to be minified as it can gain 20.5 kB, which is 17% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 108.6 kB or 89% of the original size.

Image Optimization

-48%

Potential reduce by 821.2 kB

  • Original 1.7 MB
  • After minification 889.0 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, Zvuk Svetla needs image optimization as it can save up to 821.2 kB or 48% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-22%

Potential reduce by 34.6 kB

  • Original 156.1 kB
  • After minification 156.1 kB
  • After compression 121.6 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 34.6 kB or 22% of the original size.

CSS Optimization

-14%

Potential reduce by 4.4 kB

  • Original 30.9 kB
  • After minification 30.9 kB
  • After compression 26.5 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. Zvuk-svetla.cz needs all CSS files to be minified and compressed as it can save up to 4.4 kB or 14% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (13%)

Requests Now

149

After Optimization

129

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 149 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zvuk Svetla. 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 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zvuk-svetla.cz

zvuk-svetla.cz

317 ms

www.zvuk-svetla.cz

www.zvuk-svetla.cz

497 ms

www.zvuk-svetla.cz

www.zvuk-svetla.cz

1399 ms

jquery.js

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304 ms

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303 ms

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302 ms

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321 ms

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403 ms

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529 ms

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18 ms

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777 ms

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157 ms

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188 ms

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228 ms

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228 ms

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228 ms

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147 ms

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31 ms

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621 ms

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619 ms

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21 ms

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48 ms

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613 ms

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633 ms

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590 ms

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Accessibility Review

zvuk-svetla.cz accessibility score

91

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

Links do not have a discernible name

Tables and lists

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

Impact

Issue

High

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

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

zvuk-svetla.cz best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

zvuk-svetla.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 Zvuk-svetla.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 Zvuk-svetla.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

zvuk-svetla.cz

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