Tools & Wizards About Us
vls.cz screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    47% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

vls.cz

Unikátní příroda, péče s tradicí - Vojenské lesy a statky ČR, s.p.

Page Load Speed

3.5 sec in total

First Response

434 ms

Resources Loaded

2.3 sec

Page Rendered

708 ms

vls.cz screenshot

About Website

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

VLS ČR, s.p. je státní společnost s více než 80. letou tradicí, s kořeny v první republice.

Visit vls.cz

Key Findings

We analyzed Vls.cz page load time and found that the first response time was 434 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

vls.cz performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value8.2 s

2/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value1,600 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.104

89/100

15%

TTI (Time to Interactive)

Value7.2 s

51/100

10%

Network Requests Diagram

vls.cz

434 ms

www.vls.cz

629 ms

desktop.css

207 ms

desktop.js

513 ms

logo.png

101 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 92% of them (22 requests) were addressed to the original Vls.cz, 8% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (670 ms) belongs to the original domain Vls.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 62.3 kB (7%)

Content Size

953.1 kB

After Optimization

890.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vls.cz main page is 953.1 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. 30% of websites need less resources to load. Images take 839.7 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 39.3 kB

  • Original 44.3 kB
  • After minification 23.0 kB
  • After compression 5.0 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. This page needs HTML code to be minified as it can gain 21.3 kB, which is 48% 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 39.3 kB or 89% of the original size.

Image Optimization

-1%

Potential reduce by 11.4 kB

  • Original 839.7 kB
  • After minification 828.2 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. Vls images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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

-24%

Potential reduce by 11.5 kB

  • Original 48.1 kB
  • After minification 48.1 kB
  • After compression 36.6 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. Vls.cz needs all CSS files to be minified and compressed as it can save up to 11.5 kB or 24% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

18

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 18 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vls. According to our analytics all requests are already optimized.

Network Requests Diagram

vls.cz

vls.cz

434 ms

www.vls.cz

www.vls.cz

629 ms

desktop.css

desktop.css

207 ms

desktop.js

desktop.js

513 ms

logo.png

logo.png

101 ms

sprites-desktop.png

sprites-desktop.png

200 ms

header23.jpg

header23.jpg

403 ms

youtube-play.svg

youtube-play.svg

301 ms

banner-otop-drivi.jpg

banner-otop-drivi.jpg

600 ms

logo-pefc-tm-25.png

logo-pefc-tm-25.png

410 ms

banner-deer-hunt_v2.jpg

banner-deer-hunt_v2.jpg

609 ms

ecc64320f1747e09d1215d345c7cae30.jpg

ecc64320f1747e09d1215d345c7cae30.jpg

511 ms

0d595f18da83b5550af153cc6767d7dd.jpg

0d595f18da83b5550af153cc6767d7dd.jpg

514 ms

00e49e14bee5be68e8ddedcb70b28bd0.jpg

00e49e14bee5be68e8ddedcb70b28bd0.jpg

504 ms

behej-lesy.jpg

behej-lesy.jpg

511 ms

vltava-run.jpg

vltava-run.jpg

604 ms

kolo-pro-zivot.jpg

kolo-pro-zivot.jpg

610 ms

kudyznudy.png

kudyznudy.png

611 ms

analytics.js

analytics.js

14 ms

roboto-regular-webfont.woff

roboto-regular-webfont.woff

574 ms

roboto-bold-webfont.woff

roboto-bold-webfont.woff

658 ms

MetaSerifPro-Book.woff

MetaSerifPro-Book.woff

667 ms

opensans-regular-webfont.woff

opensans-regular-webfont.woff

670 ms

collect

collect

12 ms

Accessibility Review

vls.cz accessibility score

77

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

vls.cz best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

vls.cz SEO score

92

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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

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 Vls.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 Vls.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

vls.cz

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