Tools & Wizards About Us
420on.cz screenshot

Report Summary

  • 58

    Performance

    Renders faster than
    74% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 82% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 96

    SEO

    Google-friendlier than
    91% of websites

420on.cz

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

Page Load Speed

7.4 sec in total

First Response

1.3 sec

Resources Loaded

5.5 sec

Page Rendered

602 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 1.3 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 75% of websites can load faster.

Performance Metrics

420on.cz performance score

58

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.4 s

97/100

10%

LCP (Largest Contentful Paint)

Value1.9 s

97/100

25%

SI (Speed Index)

Value6.9 s

33/100

10%

TBT (Total Blocking Time)

Value1,420 ms

15/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value14.7 s

8/100

10%

Network Requests Diagram

420on.cz

1299 ms

js

21 ms

head.js

1192 ms

application-b15b87196dbeb99cc632f585a908d050.css

434 ms

application-0848869272520d95ba541237af63e8c7.js

545 ms

Our browser made a total of 120 requests to load all elements on the main page. We found that 53% of them (63 requests) were addressed to the original 420on.cz, 5% (6 requests) were made to Mh6.adriver.ru and 4% (5 requests) were made to Ad.adriver.ru. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain 420on.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (27%)

Content Size

3.9 MB

After Optimization

2.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 420on.cz main page is 3.9 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. 70% of websites need less resources to load. Images take 2.5 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 75.3 kB

  • Original 95.9 kB
  • After minification 94.8 kB
  • After compression 20.6 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. 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 75.3 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 13.4 kB

  • Original 2.5 MB
  • After minification 2.5 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. 420 On images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 366.4 kB

  • Original 569.6 kB
  • After minification 561.9 kB
  • After compression 203.2 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 366.4 kB or 64% of the original size.

CSS Optimization

-87%

Potential reduce by 576.5 kB

  • Original 660.2 kB
  • After minification 332.7 kB
  • After compression 83.7 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 needs all CSS files to be minified and compressed as it can save up to 576.5 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 41 (38%)

Requests Now

109

After Optimization

68

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 109 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 22 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

420on.cz

420on.cz

1299 ms

js

js

21 ms

head.js

head.js

1192 ms

application-b15b87196dbeb99cc632f585a908d050.css

application-b15b87196dbeb99cc632f585a908d050.css

434 ms

application-0848869272520d95ba541237af63e8c7.js

application-0848869272520d95ba541237af63e8c7.js

545 ms

orphus-bfe735445999d10d09de396906b80d6b.js

orphus-bfe735445999d10d09de396906b80d6b.js

89 ms

top100.jcn

top100.jcn

402 ms

04n.png

04n.png

186 ms

3_1_FFFFFFFF_FFF5EEFF_0_pageviews

3_1_FFFFFFFF_FFF5EEFF_0_pageviews

225 ms

header_logo-05bcc1be721a6485c8096c4acbfe7ce4.png

header_logo-05bcc1be721a6485c8096c4acbfe7ce4.png

124 ms

uber.jpg

uber.jpg

253 ms

lita.jpg

lita.jpg

222 ms

prage-winter.jpg

prage-winter.jpg

319 ms

febiofest.jpg

febiofest.jpg

369 ms

towers.png

towers.png

825 ms

kndr.jpg

kndr.jpg

185 ms

bn.jpg

bn.jpg

252 ms

medail.jpg

medail.jpg

301 ms

12.jpg

12.jpg

366 ms

_______2.jpg

_______2.jpg

365 ms

ic_community_flood.png

ic_community_flood.png

383 ms

600679_399946276708036_246085435_n.jpg

600679_399946276708036_246085435_n.jpg

397 ms

children-573417_960_720.jpg

children-573417_960_720.jpg

420 ms

otabek1.jpg

otabek1.jpg

422 ms

____________.JPG

____________.JPG

683 ms

lNaaoYD13hA.jpg

lNaaoYD13hA.jpg

465 ms

DSC08294.jpg

DSC08294.jpg

556 ms

YsMpWGNxBfI.jpg

YsMpWGNxBfI.jpg

514 ms

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_111111.jpg

849 ms

p15_pride_01.jpg

p15_pride_01.jpg

637 ms

ava_0.jpg

ava_0.jpg

598 ms

rusart_01.jpg

rusart_01.jpg

635 ms

6.jpg

6.jpg

765 ms

belocka_avatar.jpg

belocka_avatar.jpg

715 ms

miting_praga_migranty_1.jpg

miting_praga_migranty_1.jpg

725 ms

sp_02.jpg

sp_02.jpg

764 ms

sad_roz_na_petrinach_v_prage_1.jpg

sad_roz_na_petrinach_v_prage_1.jpg

953 ms

419b52b0e70f5b74b74988c80eafe48f.jpg

419b52b0e70f5b74b74988c80eafe48f.jpg

807 ms

avtobusy_praga_ekskursija_1.jpg

avtobusy_praga_ekskursija_1.jpg

845 ms

facade-1046665_960_720.jpg

facade-1046665_960_720.jpg

868 ms

faktybiznes.jpg

faktybiznes.jpg

886 ms

kursy.jpg

kursy.jpg

902 ms

na-prikopech-3.jpg

na-prikopech-3.jpg

926 ms

adinternet_6596b6f6975e7e54eb338da67349a94a.jpg

adinternet_6596b6f6975e7e54eb338da67349a94a.jpg

923 ms

PTS55F_W-bfcb56cf104cd56cae39c6fd58832edf.woff

PTS55F_W-bfcb56cf104cd56cae39c6fd58832edf.woff

1067 ms

PTS75F_W-69d9038e6500d80c2d1716a9581d6d1e.woff

PTS75F_W-69d9038e6500d80c2d1716a9581d6d1e.woff

945 ms

watch.js

watch.js

181 ms

code.js

code.js

319 ms

ga.js

ga.js

52 ms

fbevents.js

fbevents.js

90 ms

hit

hit

254 ms

sdk.js

sdk.js

202 ms

__utm.gif

__utm.gif

18 ms

PTN57F_W-8dae2d34b9af4b06868946450ae5946a.woff

PTN57F_W-8dae2d34b9af4b06868946450ae5946a.woff

784 ms

94 ms

PTN77F_W-37259d10c8f33a1ca97a2c67fd6ffeed.woff

PTN77F_W-37259d10c8f33a1ca97a2c67fd6ffeed.woff

961 ms

collect

collect

58 ms

2B7007_1_0-2829da68db45f2503e923820a1c891ed.woff

2B7007_1_0-2829da68db45f2503e923820a1c891ed.woff

871 ms

2B7007_0_0-97861cba717b673fae8f46bcc591509e.woff

2B7007_0_0-97861cba717b673fae8f46bcc591509e.woff

967 ms

1571_1_.jpg

1571_1_.jpg

793 ms

watch.js

watch.js

472 ms

kvesty1.jpg

kvesty1.jpg

863 ms

20150827_110219.jpg

20150827_110219.jpg

815 ms

granat_baba.jpg

granat_baba.jpg

852 ms

26 ms

proger.jpg

proger.jpg

847 ms

xd_arbiter.php

xd_arbiter.php

130 ms

xd_arbiter.php

xd_arbiter.php

262 ms

cisnik.jpg

cisnik.jpg

882 ms

working-1024382_640.jpg

working-1024382_640.jpg

866 ms

after-winter.jpg

after-winter.jpg

844 ms

erle.cgi

erle.cgi

278 ms

nevesty.jpg

nevesty.jpg

860 ms

erle.cgi

erle.cgi

275 ms

erle.cgi

erle.cgi

273 ms

counter

counter

163 ms

2.jpg

2.jpg

826 ms

ministerstvo-vnitra__1_.jpg

ministerstvo-vnitra__1_.jpg

783 ms

STK1.jpg

STK1.jpg

790 ms

kratkodobe-pujcky.jpg

kratkodobe-pujcky.jpg

746 ms

erdni1.jpg

erdni1.jpg

711 ms

zamok3.jpg

zamok3.jpg

802 ms

pic-int.jpg

pic-int.jpg

695 ms

script.js

script.js

394 ms

script.js

script.js

401 ms

script.js

script.js

396 ms

orphus.png

orphus.png

667 ms

pixel.gif

pixel.gif

172 ms

86 ms

787 ms

i.gif

i.gif

532 ms

popup-bg-ddc911022c8a0c2f77b2b7f156501ade.jpg

popup-bg-ddc911022c8a0c2f77b2b7f156501ade.jpg

700 ms

advert.gif

advert.gif

91 ms

36 ms

1

1

96 ms

extender.js

extender.js

272 ms

extender.js

extender.js

273 ms

mgcs.gif

mgcs.gif

168 ms

alcs.gif

alcs.gif

273 ms

viewability.js

viewability.js

259 ms

1240x200.jpg

1240x200.jpg

670 ms

catalog_nedvizhimosti.png

catalog_nedvizhimosti.png

272 ms

viewability.js

viewability.js

263 ms

Leesora_banner_1.7.2015.jpg

Leesora_banner_1.7.2015.jpg

382 ms

dacs.gif

dacs.gif

251 ms

3.html

3.html

388 ms

3.html

3.html

399 ms

3.html

3.html

396 ms

1.js

1.js

255 ms

pixel

pixel

17 ms

adriver-sync

adriver-sync

269 ms

AJpr6q8h2qiw1aUZMuug4gA

AJpr6q8h2qiw1aUZMuug4gA

262 ms

pixel

pixel

18 ms

sync.cgi

sync.cgi

407 ms

sync.cgi

sync.cgi

345 ms

event.cgi

event.cgi

270 ms

event.cgi

event.cgi

282 ms

sync.cgi

sync.cgi

262 ms

sync.cgi

sync.cgi

533 ms

tracker

tracker

160 ms

Accessibility Review

420on.cz accessibility score

93

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

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

High

Links do not have a discernible name

Best Practices

420on.cz best practices score

75

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

SEO Factors

420on.cz SEO score

96

Search Engine Optimization Advices

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

    RU

  • Language Claimed

    N/A

  • Encoding

    UTF-8

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 neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 420on.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

420on.cz

Open Graph description is not detected on the main page of 420 On. 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: