Tools & Wizards About Us
420on.cz screenshot

Report Summary

  • 41

    Performance

    Renders faster than
    60% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

420on.cz

Все о Праге и Чехии: новости, афиша, аналитика | 420on.cz

Page Load Speed

5.9 sec in total

First Response

116 ms

Resources Loaded

5.5 sec

Page Rendered

239 ms

420on.cz screenshot

About Website

Click here to check amazing 420 On content for Czech Republic. Otherwise, check out these important facts you probably never knew about 420on.cz

Информационный портал 420on.cz предоставляет самую подробную информацию о Праге и Чехии: афиша, прогноз погоды, каталог компаний, новости достопримечательности, информация для туристов и иммигрантов

Visit 420on.cz

Key Findings

We analyzed 420on.cz page load time and found that the first response time was 116 ms and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

420on.cz performance score

41

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

77/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

87/100

25%

SI (Speed Index)

Value6.8 s

35/100

10%

TBT (Total Blocking Time)

Value2,490 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.335

34/100

15%

TTI (Time to Interactive)

Value12.8 s

13/100

10%

Network Requests Diagram

420on.cz

116 ms

420on.cz

783 ms

tailwind-1a68cc72db410121609e4d0304f458d96ae471cc3f28fa4285898180c384cb72.css

712 ms

inter-font-8c3e82affb176f4bca9616b838d906343d1251adc8408efe02cf2b1e4fcf2bc4.css

44 ms

application-84e40696b630b7671a6c8ddce496bf9ff63f1bd56c02690627a9370a61f20710.css

24 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 77% of them (34 requests) were addressed to the original 420on.cz, 9% (4 requests) were made to Googleads.g.doubleclick.net and 7% (3 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (3 sec) belongs to the original domain 420on.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 78.0 kB (30%)

Content Size

259.3 kB

After Optimization

181.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 420on.cz main page is 259.3 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 135.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 76.8 kB

  • Original 100.3 kB
  • After minification 100.3 kB
  • After compression 23.5 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. 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 76.8 kB or 77% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 135.6 kB
  • After minification 135.6 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. 420 On images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 70 B

  • Original 11.0 kB
  • After minification 11.0 kB
  • After compression 11.0 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

-9%

Potential reduce by 1.1 kB

  • Original 12.3 kB
  • After minification 12.3 kB
  • After compression 11.2 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. 420on.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 6 (21%)

Requests Now

28

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 420 On. 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

420on.cz

420on.cz

116 ms

420on.cz

420on.cz

783 ms

tailwind-1a68cc72db410121609e4d0304f458d96ae471cc3f28fa4285898180c384cb72.css

tailwind-1a68cc72db410121609e4d0304f458d96ae471cc3f28fa4285898180c384cb72.css

712 ms

inter-font-8c3e82affb176f4bca9616b838d906343d1251adc8408efe02cf2b1e4fcf2bc4.css

inter-font-8c3e82affb176f4bca9616b838d906343d1251adc8408efe02cf2b1e4fcf2bc4.css

44 ms

application-84e40696b630b7671a6c8ddce496bf9ff63f1bd56c02690627a9370a61f20710.css

application-84e40696b630b7671a6c8ddce496bf9ff63f1bd56c02690627a9370a61f20710.css

24 ms

es-module-shims.min-d89e73202ec09dede55fb74115af9c5f9f2bb965433de1c2446e1faa6dac2470.js

es-module-shims.min-d89e73202ec09dede55fb74115af9c5f9f2bb965433de1c2446e1faa6dac2470.js

35 ms

adsbygoogle.js

adsbygoogle.js

376 ms

gtm.js

gtm.js

142 ms

fbevents.js

fbevents.js

111 ms

Depositphotos_28928531_S.jpg

Depositphotos_28928531_S.jpg

464 ms

Depositphotos_39541653_S.jpg

Depositphotos_39541653_S.jpg

2488 ms

Depositphotos_57487367_S.jpg

Depositphotos_57487367_S.jpg

1809 ms

Depositphotos_551204058_L.jpg

Depositphotos_551204058_L.jpg

696 ms

c30641ff-864c-4e9d-84a9-2245a19764d8.1.jpg

c30641ff-864c-4e9d-84a9-2245a19764d8.1.jpg

451 ms

Screenshot_30.png

Screenshot_30.png

465 ms

1.jpg

1.jpg

1168 ms

2.jpg

2.jpg

840 ms

4.jpg

4.jpg

1283 ms

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

2082 ms

1.jpg

1.jpg

1212 ms

2.jpg

2.jpg

1550 ms

4.jpg

4.jpg

1737 ms

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

1660 ms

show_ads_impl.js

show_ads_impl.js

294 ms

zrt_lookup.html

zrt_lookup.html

20 ms

ads

ads

148 ms

c30641ff-864c-4e9d-84a9-2245a19764d8.1.webp

c30641ff-864c-4e9d-84a9-2245a19764d8.1.webp

2724 ms

Depositphotos_28928531_S.webp

Depositphotos_28928531_S.webp

3003 ms

Screenshot_30.webp

Screenshot_30.webp

2738 ms

ca-pub-4210860558654007

ca-pub-4210860558654007

161 ms

slotcar_library.js

slotcar_library.js

175 ms

Depositphotos_551204058_L.webp

Depositphotos_551204058_L.webp

1923 ms

ads

ads

374 ms

ads

ads

252 ms

2.jpg

2.jpg

1714 ms

1.jpg

1.jpg

1792 ms

1.jpg

1.jpg

1701 ms

4.jpg

4.jpg

1817 ms

2.jpg

2.jpg

1719 ms

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

1655 ms

4.jpg

4.jpg

1710 ms

Depositphotos_57487367_S.webp

Depositphotos_57487367_S.webp

2113 ms

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

%D0%94%D0%B8%D0%B7%D0%B0%D0%B8%CC%86%D0%BD%20%D0%B1%D0%B5%D0%B7%20%D0%BD%D0%B0%D0%B7%D0%B2%D0%B0%D0%BD%D0%B8%D1%8F.jpg

1563 ms

Depositphotos_39541653_S.webp

Depositphotos_39541653_S.webp

1521 ms

Accessibility Review

420on.cz accessibility score

74

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Best Practices

420on.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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

420on.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

    RU

  • Language Claimed

    RU

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 420on.cz can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that 420on.cz main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

420on.cz

Open Graph data is detected on the main page of 420 On. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: