Tools & Wizards About Us
zoo-ostrava.cz screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

zoo-ostrava.cz

Zoo Ostrava - příroda na dosah

Page Load Speed

25.6 sec in total

First Response

422 ms

Resources Loaded

22.8 sec

Page Rendered

2.4 sec

zoo-ostrava.cz screenshot

About Website

Click here to check amazing Zoo Ostrava content for Czech Republic. Otherwise, check out these important facts you probably never knew about zoo-ostrava.cz

Ostravská Zoo, to je příroda na dosah. Velká Zoo s mnoha zvířaty a velkou botanickou zahradou.

Visit zoo-ostrava.cz

Key Findings

We analyzed Zoo-ostrava.cz page load time and found that the first response time was 422 ms and then it took 25.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

zoo-ostrava.cz performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value16.5 s

0/100

25%

SI (Speed Index)

Value10.8 s

6/100

10%

TBT (Total Blocking Time)

Value2,730 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value23.6 s

1/100

10%

Network Requests Diagram

zoo-ostrava.cz

422 ms

zoo-ostrava.cz

402 ms

www.zoo-ostrava.cz

661 ms

css

38 ms

default.css

197 ms

Our browser made a total of 169 requests to load all elements on the main page. We found that 66% of them (111 requests) were addressed to the original Zoo-ostrava.cz, 7% (11 requests) were made to Static.xx.fbcdn.net and 5% (8 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (19.7 sec) relates to the external source Tripadvisor.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 314.6 kB (4%)

Content Size

8.6 MB

After Optimization

8.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zoo-ostrava.cz main page is 8.6 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. Only a small number of websites need less resources to load. Images take 8.2 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 79.1 kB

  • Original 96.7 kB
  • After minification 80.5 kB
  • After compression 17.6 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 16.2 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 79.1 kB or 82% of the original size.

Image Optimization

-3%

Potential reduce by 224.3 kB

  • Original 8.2 MB
  • After minification 7.9 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. Zoo Ostrava images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 7.7 kB

  • Original 240.5 kB
  • After minification 240.5 kB
  • After compression 232.9 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

-4%

Potential reduce by 3.5 kB

  • Original 85.9 kB
  • After minification 85.9 kB
  • After compression 82.4 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. Zoo-ostrava.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 50 (32%)

Requests Now

156

After Optimization

106

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 156 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zoo Ostrava. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 31 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zoo-ostrava.cz

zoo-ostrava.cz

422 ms

zoo-ostrava.cz

zoo-ostrava.cz

402 ms

www.zoo-ostrava.cz

www.zoo-ostrava.cz

661 ms

css

css

38 ms

default.css

default.css

197 ms

respons.css

respons.css

292 ms

jquery.fancybox.css

jquery.fancybox.css

294 ms

fliper.css

fliper.css

294 ms

jquery.js

jquery.js

393 ms

bxslider.js

bxslider.js

296 ms

jquery.fancybox.js

jquery.fancybox.js

509 ms

main.js

main.js

389 ms

vstupne.js

vstupne.js

388 ms

fancybox_settings.js

fancybox_settings.js

389 ms

nav_kniha.js

nav_kniha.js

390 ms

bio.css

bio.css

496 ms

jquery.modal.min.js

jquery.modal.min.js

32 ms

jquery.modal.min.css

jquery.modal.min.css

496 ms

ochrana_prirody.js

ochrana_prirody.js

485 ms

js

js

52 ms

js

js

81 ms

bb_one2n.js

bb_one2n.js

676 ms

wejs

wejs

19693 ms

flag_cz.svg

flag_cz.svg

144 ms

flag_pl.svg

flag_pl.svg

142 ms

flag_gb.svg

flag_gb.svg

141 ms

flag_ua.svg

flag_ua.svg

143 ms

wanderu.jpg

wanderu.jpg

144 ms

vadtha.jpg

vadtha.jpg

237 ms

pampa.jpg

pampa.jpg

248 ms

evoluce.jpg

evoluce.jpg

751 ms

expozice2.jpg

expozice2.jpg

581 ms

expozice4.jpg

expozice4.jpg

581 ms

expozice3.jpg

expozice3.jpg

248 ms

expozice6.jpg

expozice6.jpg

580 ms

pavilion_afr_zvirat.jpg

pavilion_afr_zvirat.jpg

579 ms

na_statku.jpg

na_statku.jpg

578 ms

park_car-image3.jpg

park_car-image3.jpg

610 ms

park_car-image.jpg

park_car-image.jpg

609 ms

park_car-image2.jpg

park_car-image2.jpg

748 ms

park_car-image5.jpg

park_car-image5.jpg

747 ms

park_car-image6.jpg

park_car-image6.jpg

747 ms

park_car-image7.jpg

park_car-image7.jpg

749 ms

ptak-vodous.png

ptak-vodous.png

748 ms

kun.png

kun.png

835 ms

b_image1.jpg

b_image1.jpg

834 ms

b_image2.jpg

b_image2.jpg

876 ms

b_image3.jpg

b_image3.jpg

908 ms

ic_facebook.png

ic_facebook.png

836 ms

ic_instagram.png

ic_instagram.png

834 ms

loskutak.png

loskutak.png

878 ms

kraska.png

kraska.png

878 ms

logo_silent-forest.png

logo_silent-forest.png

906 ms

mapa2024_cz.jpg

mapa2024_cz.jpg

1195 ms

logo_instagram.png

logo_instagram.png

1069 ms

logo_youtube.png

logo_youtube.png

974 ms

komercni-banka.png

komercni-banka.png

975 ms

logo_msk.png

logo_msk.png

1013 ms

all.js

all.js

116 ms

JMU4acx4jr8

JMU4acx4jr8

187 ms

logo-auto-heller.png

logo-auto-heller.png

957 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJN7Ml1RMC.woff

HhyJU5sn9vOmLxNkIwRSjTVNWLEJN7Ml1RMC.woff

57 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJBbMl1RMC.woff

HhyJU5sn9vOmLxNkIwRSjTVNWLEJBbMl1RMC.woff

56 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJabMl1RMC.woff

HhyJU5sn9vOmLxNkIwRSjTVNWLEJabMl1RMC.woff

79 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJ6bQl1RMC.woff

HhyJU5sn9vOmLxNkIwRSjTVNWLEJ6bQl1RMC.woff

92 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJ0LQl1RMC.woff

HhyJU5sn9vOmLxNkIwRSjTVNWLEJ0LQl1RMC.woff

93 ms

HhyJU5sn9vOmLxNkIwRSjTVNWLEJt7Ql1RMC.woff

HhyJU5sn9vOmLxNkIwRSjTVNWLEJt7Ql1RMC.woff

168 ms

radegast.png

radegast.png

935 ms

web_evolution.png

web_evolution.png

935 ms

logo_innogy2023.png

logo_innogy2023.png

973 ms

logo_orion.png

logo_orion.png

989 ms

ovanet.png

ovanet.png

1029 ms

all.js

all.js

8 ms

kb_nadace.png

kb_nadace.png

928 ms

logo_lesycr.png

logo_lesycr.png

926 ms

20x28_white-21693-2.png

20x28_white-21693-2.png

30 ms

bb_one2n.167.65.172.1.js

bb_one2n.167.65.172.1.js

706 ms

www-player.css

www-player.css

5 ms

www-embed-player.js

www-embed-player.js

29 ms

base.js

base.js

55 ms

logo_cerna_louka.png

logo_cerna_louka.png

960 ms

ad_status.js

ad_status.js

160 ms

yLH_7IXO2IqaYUCpWhi8UlTKCOG5A1JfiUQGnHrKDOk.js

yLH_7IXO2IqaYUCpWhi8UlTKCOG5A1JfiUQGnHrKDOk.js

125 ms

embed.js

embed.js

40 ms

upper_bar.png

upper_bar.png

1119 ms

logo3.png

logo3.png

691 ms

upper_inner.png

upper_inner.png

691 ms

lang_arr.png

lang_arr.png

691 ms

ico_search.png

ico_search.png

690 ms

logo2023.png

logo2023.png

701 ms

KFOmCnqEu92Fr1Mu4mxM.woff

KFOmCnqEu92Fr1Mu4mxM.woff

31 ms

KFOlCnqEu92Fr1MmEU9fBBc-.woff

KFOlCnqEu92Fr1MmEU9fBBc-.woff

31 ms

safari.jpg

safari.jpg

856 ms

id

id

33 ms

Create

Create

93 ms

more_arr.png

more_arr.png

620 ms

plamenak2.jpg

plamenak2.jpg

814 ms

carousel_more.png

carousel_more.png

646 ms

expozice_bg.png

expozice_bg.png

659 ms

expozice_item.png

expozice_item.png

717 ms

expozice_maska.png

expozice_maska.png

742 ms

park_ico1.png

park_ico1.png

671 ms

park_ico2.png

park_ico2.png

726 ms

park_ico3.png

park_ico3.png

727 ms

shopuvod-bg.jpg

shopuvod-bg.jpg

756 ms

GenerateIT

GenerateIT

12 ms

historie-bg.jpg

historie-bg.jpg

822 ms

70let.png

70let.png

782 ms

pc-bg.jpg

pc-bg.jpg

783 ms

icko.jpg

icko.jpg

755 ms

bg_kozmicke-louky.jpg

bg_kozmicke-louky.jpg

787 ms

bg_biodiversity.jpg

bg_biodiversity.jpg

785 ms

ico_alert-big.png

ico_alert-big.png

785 ms

detske-hriste.jpg

detske-hriste.jpg

906 ms

bg_evolution.jpg

bg_evolution.jpg

1779 ms

evolution_ring1.png

evolution_ring1.png

749 ms

evolution_ring2.png

evolution_ring2.png

749 ms

bg_ukradena-divocina.jpg

bg_ukradena-divocina.jpg

792 ms

bg_silent-forest.jpg

bg_silent-forest.jpg

855 ms

bg_palm-oil.jpg

bg_palm-oil.jpg

805 ms

ico_alert.png

ico_alert.png

762 ms

ico_web-brown.png

ico_web-brown.png

792 ms

ico_fb-brown.png

ico_fb-brown.png

847 ms

about_bg.jpg

about_bg.jpg

834 ms

prebalovaci.png

prebalovaci.png

823 ms

ohrev.png

ohrev.png

794 ms

zapujceni_voziku.png

zapujceni_voziku.png

797 ms

detske_hriste.png

detske_hriste.png

848 ms

moznost_zapujceni.png

moznost_zapujceni.png

835 ms

jizda_vlackem.png

jizda_vlackem.png

823 ms

ico_dog.png

ico_dog.png

795 ms

bg_skelets.jpg

bg_skelets.jpg

773 ms

bg_fire.jpg

bg_fire.jpg

808 ms

ochrana_prirody_bottom.jpg

ochrana_prirody_bottom.jpg

961 ms

ochrana_bottom_icon.png

ochrana_bottom_icon.png

761 ms

log_event

log_event

16 ms

bbnaut-lib-2.2.1.min.js

bbnaut-lib-2.2.1.min.js

612 ms

372 ms

carousel_pagi.png

carousel_pagi.png

459 ms

car_left.png

car_left.png

477 ms

car_right.png

car_right.png

469 ms

slider_pagi.png

slider_pagi.png

469 ms

page.php

page.php

95 ms

page.php

page.php

279 ms

page.php

page.php

372 ms

page.php

page.php

380 ms

page.php

page.php

237 ms

Tn6TTrCOVos.css

Tn6TTrCOVos.css

16 ms

odEcj4EBDzB.js

odEcj4EBDzB.js

25 ms

o1ndYS2og_B.js

o1ndYS2og_B.js

51 ms

Ez8TaPyQZ7-.js

Ez8TaPyQZ7-.js

54 ms

s23ZuKml3wQ.js

s23ZuKml3wQ.js

55 ms

_uEhsxKAS3c.js

_uEhsxKAS3c.js

53 ms

9f_Alkp5qWb.js

9f_Alkp5qWb.js

52 ms

p55HfXW__mM.js

p55HfXW__mM.js

51 ms

441901941_840969894721981_6792244718374708746_n.jpg

441901941_840969894721981_6792244718374708746_n.jpg

205 ms

e-09qslM9lx.js

e-09qslM9lx.js

189 ms

EIDMHaVPVS4.js

EIDMHaVPVS4.js

195 ms

355311145_644302611055378_254218106399212895_n.jpg

355311145_644302611055378_254218106399212895_n.jpg

194 ms

UXtr_j2Fwe-.png

UXtr_j2Fwe-.png

188 ms

305847890_450809730414080_3018745922535310543_n.jpg

305847890_450809730414080_3018745922535310543_n.jpg

247 ms

302693432_450809727080747_6519610333858820471_n.jpg

302693432_450809727080747_6519610333858820471_n.jpg

165 ms

355289390_809496594243233_3358212079575237562_n.jpg

355289390_809496594243233_3358212079575237562_n.jpg

158 ms

431532513_983666940159530_4542356085065538204_n.jpg

431532513_983666940159530_4542356085065538204_n.jpg

191 ms

441457151_947736134024915_1648871764037324568_n.jpg

441457151_947736134024915_1648871764037324568_n.jpg

35 ms

355148921_728194452645752_9054884448880306006_n.jpg

355148921_728194452645752_9054884448880306006_n.jpg

44 ms

326520482_565646281892644_5327058414739233311_n.jpg

326520482_565646281892644_5327058414739233311_n.jpg

63 ms

327348323_865362847854360_1689888946715714727_n.jpg

327348323_865362847854360_1689888946715714727_n.jpg

56 ms

co

co

585 ms

Accessibility Review

zoo-ostrava.cz accessibility score

74

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

zoo-ostrava.cz best practices score

67

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

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

zoo-ostrava.cz SEO score

85

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

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 Zoo-ostrava.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 Zoo-ostrava.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

zoo-ostrava.cz

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