Tools & Wizards About Us
hvezdarna.cz screenshot

Report Summary

  • 68

    Performance

    Renders faster than
    80% of other websites

  • 83

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

hvezdarna.cz

Hvězdárna a planetárium Brno

Page Load Speed

4.2 sec in total

First Response

520 ms

Resources Loaded

3.3 sec

Page Rendered

384 ms

hvezdarna.cz screenshot

About Website

Welcome to hvezdarna.cz homepage info - get ready to check Hvezdarna best content for Russia right away, or after learning these important things about hvezdarna.cz

Hvězdárna a planetárium Brno

Visit hvezdarna.cz

Key Findings

We analyzed Hvezdarna.cz page load time and found that the first response time was 520 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

hvezdarna.cz performance score

68

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

47/100

10%

LCP (Largest Contentful Paint)

Value6.3 s

10/100

25%

SI (Speed Index)

Value3.9 s

83/100

10%

TBT (Total Blocking Time)

Value80 ms

99/100

30%

CLS (Cumulative Layout Shift)

Value0.043

99/100

15%

TTI (Time to Interactive)

Value4.6 s

81/100

10%

Network Requests Diagram

hvezdarna.cz

520 ms

www.hvezdarna.cz

645 ms

fbevents.js

23 ms

css2

62 ms

style.min.css

109 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that 92% of them (78 requests) were addressed to the original Hvezdarna.cz, 6% (5 requests) were made to Fonts.gstatic.com and 1% (1 request) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Hvezdarna.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 223.5 kB (10%)

Content Size

2.2 MB

After Optimization

2.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Hvezdarna.cz main page is 2.2 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. 40% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 59.1 kB

  • Original 73.1 kB
  • After minification 70.9 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 59.1 kB or 81% of the original size.

Image Optimization

-2%

Potential reduce by 41.3 kB

  • Original 2.0 MB
  • After minification 1.9 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. Hvezdarna images are well optimized though.

JavaScript Optimization

-40%

Potential reduce by 12.2 kB

  • Original 30.7 kB
  • After minification 27.6 kB
  • After compression 18.6 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 12.2 kB or 40% of the original size.

CSS Optimization

-81%

Potential reduce by 110.9 kB

  • Original 136.7 kB
  • After minification 125.5 kB
  • After compression 25.8 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. Hvezdarna.cz needs all CSS files to be minified and compressed as it can save up to 110.9 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 29 (37%)

Requests Now

78

After Optimization

49

  • Images
  • JavaScript
  • CSS

The browser has sent 78 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Hvezdarna. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

hvezdarna.cz

hvezdarna.cz

520 ms

www.hvezdarna.cz

www.hvezdarna.cz

645 ms

fbevents.js

fbevents.js

23 ms

css2

css2

62 ms

style.min.css

style.min.css

109 ms

cookieblocker.min.css

cookieblocker.min.css

219 ms

effects.js

effects.js

316 ms

complianz.min.js

complianz.min.js

314 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

298 ms

style.css

style.css

229 ms

body-trans.png

body-trans.png

617 ms

HPB_logotyp_trans.png

HPB_logotyp_trans.png

111 ms

menu.svg

menu.svg

111 ms

menu-english-2.svg

menu-english-2.svg

129 ms

menu-english.svg

menu-english.svg

227 ms

menu-zpravodaj.svg

menu-zpravodaj.svg

218 ms

menu-youtube.svg

menu-youtube.svg

217 ms

menu-facebook.svg

menu-facebook.svg

213 ms

menu-instagram.svg

menu-instagram.svg

221 ms

menu-rss.svg

menu-rss.svg

320 ms

trans.gif

trans.gif

320 ms

banner-kruh.png

banner-kruh.png

423 ms

program.svg

program.svg

337 ms

verejnost.svg

verejnost.svg

339 ms

skoly.svg

skoly.svg

428 ms

zavrit.svg

zavrit.svg

425 ms

kulicky-en.svg

kulicky-en.svg

447 ms

CerneDiry_A4sirka_CMYK-1-320x320.jpg

CerneDiry_A4sirka_CMYK-1-320x320.jpg

654 ms

335902351_224987000029481_196506330594053635_n-320x320.jpg

335902351_224987000029481_196506330594053635_n-320x320.jpg

525 ms

interier_261-320x320.jpg

interier_261-320x320.jpg

528 ms

odeslat.svg

odeslat.svg

532 ms

jmk.png

jmk.png

553 ms

snip.png

snip.png

628 ms

dpmb.png

dpmb.png

632 ms

salina.png

salina.png

633 ms

denik.png

denik.png

660 ms

eurozpravy.png

eurozpravy.png

715 ms

flyingmag.png

flyingmag.png

729 ms

kult_new.png

kult_new.png

736 ms

hitradiocity2022.png

hitradiocity2022.png

735 ms

radioblanik.png

radioblanik.png

758 ms

natgeo.png

natgeo.png

766 ms

casc.png

casc.png

817 ms

cas.png

cas.png

831 ms

top-jizni-morava.png

top-jizni-morava.png

782 ms

aqualand.png

aqualand.png

770 ms

STAREZ_LOGO.png

STAREZ_LOGO.png

756 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0C4k.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsjZ0C4k.woff

21 ms

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1y4k.woff

memSYaGs126MiZpBA-UvWbX2vVnXBbObj2OVZyOOSr4dVJWUgsgH1y4k.woff

41 ms

TK3_WkUHHAIjg75cFRf3bXL8LICs18NvgUI.woff

TK3_WkUHHAIjg75cFRf3bXL8LICs18NvgUI.woff

47 ms

TK3_WkUHHAIjg75cFRf3bXL8LICs169vgUI.woff

TK3_WkUHHAIjg75cFRf3bXL8LICs169vgUI.woff

65 ms

memQYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWq8tWZ0Pw86hd0Rk8ZkaVQ.woff

memQYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWq8tWZ0Pw86hd0Rk8ZkaVQ.woff

65 ms

tsb.png

tsb.png

755 ms

brnojih.png

brnojih.png

794 ms

citytools.png

citytools.png

727 ms

koupalistekravihora.png

koupalistekravihora.png

724 ms

montebu.png

montebu.png

727 ms

opportunity.png

opportunity.png

750 ms

faster.png

faster.png

755 ms

kudyznudy.png

kudyznudy.png

704 ms

CCF.png

CCF.png

721 ms

novinykraje.png

novinykraje.png

705 ms

brno.png

brno.png

708 ms

tecka-modra.svg

tecka-modra.svg

662 ms

tecka-bila.svg

tecka-bila.svg

666 ms

seda-center.png

seda-center.png

700 ms

sipka-dalsi-modra.svg

sipka-dalsi-modra.svg

706 ms

CerneDiry_WEB_1000x400.jpg

CerneDiry_WEB_1000x400.jpg

1028 ms

modra-left.png

modra-left.png

623 ms

kalendar.svg

kalendar.svg

663 ms

sipka-predchozi-disabled.svg

sipka-predchozi-disabled.svg

646 ms

sipka-dalsi.svg

sipka-dalsi.svg

618 ms

porad.png

porad.png

627 ms

cervena-left.png

cervena-left.png

622 ms

kulicky-tmave.svg

kulicky-tmave.svg

671 ms

vstupenky-grey.svg

vstupenky-grey.svg

655 ms

sdilet.svg

sdilet.svg

682 ms

vstupenky.svg

vstupenky.svg

648 ms

informace.svg

informace.svg

632 ms

kulicky-svetle.svg

kulicky-svetle.svg

675 ms

seda-left.png

seda-left.png

679 ms

tema-brno360.jpg

tema-brno360.jpg

694 ms

footer-kruh.png

footer-kruh.png

697 ms

tema-brno360-lowq-2-1.jpg

tema-brno360-lowq-2-1.jpg

863 ms

style-mobile.css

style-mobile.css

109 ms

Accessibility Review

hvezdarna.cz accessibility score

83

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

hvezdarna.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

SEO Factors

hvezdarna.cz SEO score

92

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Hvezdarna.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 Hvezdarna.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

hvezdarna.cz

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