Tools & Wizards About Us
zsvltava.cz screenshot

Report Summary

  • 59

    Performance

    Renders faster than
    74% of other websites

  • 76

    Accessibility

    Visual factors better than
    that of 42% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 62

    SEO

    Google-friendlier than
    23% of websites

zsvltava.cz

ZŠ a ZUŠ Bezdrevská 3 České Budějovice - ZŠ VLTAVA - stránky základní a základní umělecké školy

Page Load Speed

4 sec in total

First Response

470 ms

Resources Loaded

2.2 sec

Page Rendered

1.3 sec

zsvltava.cz screenshot

About Website

Click here to check amazing Zs VLTAVA content for Czech Republic. Otherwise, check out these important facts you probably never knew about zsvltava.cz

Základní a základní umělecká škola Bezdrevská 3 / ZŠ VLTAVA České Budějovice. IČ: 00666131, Telefon: +420385524203

Visit zsvltava.cz

Key Findings

We analyzed Zsvltava.cz page load time and found that the first response time was 470 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

zsvltava.cz performance score

59

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

68/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value3.5 s

88/100

10%

TBT (Total Blocking Time)

Value110 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.284

42/100

15%

TTI (Time to Interactive)

Value4.8 s

78/100

10%

Network Requests Diagram

zsvltava.cz

470 ms

css2

47 ms

screen2.css

123 ms

jquery-3.3.1.min.js

339 ms

jquery.easing.1.3.js

227 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 70% of them (32 requests) were addressed to the original Zsvltava.cz, 9% (4 requests) were made to Fonts.gstatic.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Zsvltava.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 40.2 kB (1%)

Content Size

4.8 MB

After Optimization

4.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zsvltava.cz main page is 4.8 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. 55% of websites need less resources to load. Images take 4.7 MB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 18.0 kB

  • Original 25.3 kB
  • After minification 21.9 kB
  • After compression 7.3 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 3.4 kB, which is 13% 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 18.0 kB or 71% of the original size.

Image Optimization

-0%

Potential reduce by 16.4 kB

  • Original 4.7 MB
  • After minification 4.7 MB

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. Zs VLTAVA images are well optimized though.

JavaScript Optimization

-4%

Potential reduce by 2.3 kB

  • Original 56.4 kB
  • After minification 56.4 kB
  • After compression 54.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-22%

Potential reduce by 3.6 kB

  • Original 16.5 kB
  • After minification 16.5 kB
  • After compression 12.9 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. Zsvltava.cz needs all CSS files to be minified and compressed as it can save up to 3.6 kB or 22% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (16%)

Requests Now

38

After Optimization

32

  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zs VLTAVA. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

zsvltava.cz

zsvltava.cz

470 ms

css2

css2

47 ms

screen2.css

screen2.css

123 ms

jquery-3.3.1.min.js

jquery-3.3.1.min.js

339 ms

jquery.easing.1.3.js

jquery.easing.1.3.js

227 ms

jquery.fancybox.min.css

jquery.fancybox.min.css

228 ms

jquery.fancybox.min.js

jquery.fancybox.min.js

336 ms

jquery.galleryview-2.0-pack.js

jquery.galleryview-2.0-pack.js

227 ms

jquery.timers-1.1.2.js

jquery.timers-1.1.2.js

236 ms

clock.js

clock.js

533 ms

favicon.ico

favicon.ico

644 ms

favicon.ico

favicon.ico

628 ms

favicon5.ico

favicon5.ico

165 ms

favicon.ico

favicon.ico

645 ms

Logo_25wht.gif

Logo_25wht.gif

129 ms

acorns-1685112_1280.jpg

acorns-1685112_1280.jpg

331 ms

walpaper.svg

walpaper.svg

438 ms

top-theme-2019.png

top-theme-2019.png

428 ms

city-hall-black.svg

city-hall-black.svg

284 ms

elektronicka-zakovska.svg

elektronicka-zakovska.svg

239 ms

success.svg

success.svg

295 ms

new-win-grey.svg

new-win-grey.svg

293 ms

email.svg

email.svg

329 ms

creativity.svg

creativity.svg

358 ms

market-research.svg

market-research.svg

332 ms

logo_ekoskoly.jpg

logo_ekoskoly.jpg

362 ms

pohyb-a-vyziva-logo.png.jpg

pohyb-a-vyziva-logo.png.jpg

542 ms

priprava-na-pz-szscb.jpg

priprava-na-pz-szscb.jpg

655 ms

vnb-krouzky-a4.jpg

vnb-krouzky-a4.jpg

866 ms

krouzkyzdr.jpg

krouzkyzdr.jpg

762 ms

fan-1.jpg

fan-1.jpg

961 ms

cd2-1.jpg

cd2-1.jpg

876 ms

robo-1.jpg

robo-1.jpg

1011 ms

cvp-1.jpg

cvp-1.jpg

1303 ms

tvyb-1.jpg

tvyb-1.jpg

1101 ms

music-note.svg

music-note.svg

980 ms

eu_stars.svg

eu_stars.svg

981 ms

eu-3.2.3.png

eu-3.2.3.png

1071 ms

Logolink_OP_VVV_hor_barva_cz.jpg

Logolink_OP_VVV_hor_barva_cz.jpg

1090 ms

BngbUXZYTXPIvIBgJJSb6s3BzlRRfKOFbvjojISWaA.ttf

BngbUXZYTXPIvIBgJJSb6s3BzlRRfKOFbvjojISWaA.ttf

60 ms

BngbUXZYTXPIvIBgJJSb6s3BzlRRfKOFbvjoa4OWaA.ttf

BngbUXZYTXPIvIBgJJSb6s3BzlRRfKOFbvjoa4OWaA.ttf

82 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJ0LQV3A.ttf

HhyJU5sn9vOmLxNkIwRSjTVNWLEJ0LQV3A.ttf

85 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJN7MV3A.ttf

HhyJU5sn9vOmLxNkIwRSjTVNWLEJN7MV3A.ttf

84 ms

ga.js

ga.js

13 ms

__utm.gif

__utm.gif

31 ms

collect

collect

112 ms

Accessibility Review

zsvltava.cz accessibility score

76

Accessibility Issues

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

Image elements do not have [alt] attributes

Best Practices

zsvltava.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

zsvltava.cz SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

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 Zsvltava.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 Zsvltava.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

zsvltava.cz

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