Tools & Wizards About Us
chernobylzone.cz screenshot

Report Summary

  • 14

    Performance

    Renders faster than
    26% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

chernobylzone.cz

Černobyl - informace o Černobylu a havárii, fotky, videa, zájezdy

Page Load Speed

7.2 sec in total

First Response

1.1 sec

Resources Loaded

4.7 sec

Page Rendered

1.4 sec

chernobylzone.cz screenshot

About Website

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

Černobyl a Černobylská havárie - informace a historie o Černobylu, videa, fotky, zájezdy do Černobylu a černobylské exkurze

Visit chernobylzone.cz

Key Findings

We analyzed Chernobylzone.cz page load time and found that the first response time was 1.1 sec and then it took 6.1 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

chernobylzone.cz performance score

14

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value9.8 s

0/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value1,010 ms

27/100

30%

CLS (Cumulative Layout Shift)

Value0.495

16/100

15%

TTI (Time to Interactive)

Value19.2 s

2/100

10%

Network Requests Diagram

chernobylzone.cz

1083 ms

simple-lightbox.css

190 ms

cookieblocker.min.css

295 ms

css

41 ms

bootstrap.min.css

392 ms

Our browser made a total of 135 requests to load all elements on the main page. We found that 81% of them (110 requests) were addressed to the original Chernobylzone.cz, 11% (15 requests) were made to Fonts.gstatic.com and 3% (4 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Chernobylzone.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 293.5 kB (8%)

Content Size

3.5 MB

After Optimization

3.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chernobylzone.cz main page is 3.5 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 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 201.4 kB

  • Original 245.9 kB
  • After minification 217.3 kB
  • After compression 44.5 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 28.7 kB, which is 12% 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 201.4 kB or 82% of the original size.

Image Optimization

-2%

Potential reduce by 65.4 kB

  • Original 2.7 MB
  • After minification 2.7 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. Chernobylzone images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 3.0 kB

  • Original 450.4 kB
  • After minification 450.4 kB
  • After compression 447.4 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

-20%

Potential reduce by 23.7 kB

  • Original 119.2 kB
  • After minification 97.9 kB
  • After compression 95.5 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. Chernobylzone.cz needs all CSS files to be minified and compressed as it can save up to 23.7 kB or 20% of the original size.

Requests Breakdown

Number of requests can be reduced by 50 (43%)

Requests Now

115

After Optimization

65

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 115 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chernobylzone. 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 21 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

chernobylzone.cz

chernobylzone.cz

1083 ms

simple-lightbox.css

simple-lightbox.css

190 ms

cookieblocker.min.css

cookieblocker.min.css

295 ms

css

css

41 ms

bootstrap.min.css

bootstrap.min.css

392 ms

all.min.css

all.min.css

399 ms

sidebarnav.min.css

sidebarnav.min.css

295 ms

animation.css

animation.css

295 ms

owl.carousel.min.css

owl.carousel.min.css

297 ms

slick.css

slick.css

409 ms

magnific-popup.css

magnific-popup.css

409 ms

metis-menu.css

metis-menu.css

409 ms

post-style.css

post-style.css

409 ms

benqu-style.css

benqu-style.css

501 ms

responsive.css

responsive.css

498 ms

style.css

style.css

510 ms

frontend-lite.min.css

frontend-lite.min.css

515 ms

swiper.min.css

swiper.min.css

513 ms

post-277734.css

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603 ms

global.css

global.css

604 ms

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613 ms

css

css

38 ms

jquery.min.js

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712 ms

jquery-migrate.min.js

jquery-migrate.min.js

619 ms

ajax.min.js

ajax.min.js

619 ms

js

js

64 ms

adsbygoogle.js

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59 ms

ssp.js

ssp.js

692 ms

postviews-cache.js

postviews-cache.js

621 ms

common.js

common.js

623 ms

lightbox_context.js

lightbox_context.js

809 ms

simple-lightbox.js

simple-lightbox.js

809 ms

nextgen_simple_lightbox_init.js

nextgen_simple_lightbox_init.js

809 ms

imagesloaded.min.js

imagesloaded.min.js

810 ms

masonry.min.js

masonry.min.js

811 ms

popper.min.js

popper.min.js

811 ms

bootstrap.min.js

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811 ms

owl.carousel.min.js

owl.carousel.min.js

812 ms

slick.min.js

slick.min.js

812 ms

metisMenu.min.js

metisMenu.min.js

836 ms

sidebarnav.min.js

sidebarnav.min.js

834 ms

resize-sensor.min.js

resize-sensor.min.js

740 ms

theia-sticky-sidebar.min.js

theia-sticky-sidebar.min.js

883 ms

wow.min.js

wow.min.js

880 ms

jquery.magnific-popup.min.js

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880 ms

scripts.js

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complianz.min.js

complianz.min.js

783 ms

webpack.runtime.min.js

webpack.runtime.min.js

773 ms

frontend-modules.min.js

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893 ms

waypoints.min.js

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890 ms

core.min.js

core.min.js

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frontend.min.js

frontend.min.js

892 ms

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541 ms

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541 ms

nav.svg

nav.svg

632 ms

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632 ms

mina.webp

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825 ms

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1005 ms

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hasici.webp

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145 ms

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811 ms

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1011 ms

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967 ms

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154 ms

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269 ms

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306 ms

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670 ms

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368 ms

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306 ms

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671 ms

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306 ms

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668 ms

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671 ms

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669 ms

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1175 ms

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1160 ms

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1077 ms

Vlk.jpg

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1158 ms

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219 ms

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221 ms

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222 ms

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186 ms

ads

ads

290 ms

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278 ms

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1009 ms

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614 ms

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1106 ms

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sun.svg

644 ms

Accessibility Review

chernobylzone.cz accessibility score

78

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

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

chernobylzone.cz best practices score

92

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

High

Page has valid source maps

SEO Factors

chernobylzone.cz SEO score

86

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 Chernobylzone.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 Chernobylzone.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

chernobylzone.cz

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