Tools & Wizards About Us
just4web.cz screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% 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

  • 89

    SEO

    Google-friendlier than
    67% of websites

just4web.cz

just4web.cz s.r.o. – tvorba webů a marketing Havlíčkův Brod

Page Load Speed

3.2 sec in total

First Response

612 ms

Resources Loaded

2.4 sec

Page Rendered

216 ms

just4web.cz screenshot

About Website

Welcome to just4web.cz homepage info - get ready to check Just 4 Web best content for Czech Republic right away, or after learning these important things about just4web.cz

Webové stránky tvoříme přes 10 let. ✅ Přivádíme návštěvníky, ze kterých se stanou zákazníci. ✅ Jsme vašim partnerem ve světě online.

Visit just4web.cz

Key Findings

We analyzed Just4web.cz page load time and found that the first response time was 612 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

just4web.cz performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.0 s

1/100

10%

LCP (Largest Contentful Paint)

Value12.3 s

0/100

25%

SI (Speed Index)

Value10.1 s

9/100

10%

TBT (Total Blocking Time)

Value1,440 ms

15/100

30%

CLS (Cumulative Layout Shift)

Value0.068

96/100

15%

TTI (Time to Interactive)

Value15.0 s

8/100

10%

Network Requests Diagram

just4web.cz

612 ms

default.css

360 ms

mobile.css

357 ms

prettyPhoto.css

362 ms

easyslider.css

364 ms

Our browser made a total of 81 requests to load all elements on the main page. We found that 37% of them (30 requests) were addressed to the original Just4web.cz, 31% (25 requests) were made to Maps.google.com and 11% (9 requests) were made to Maps.gstatic.com. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Just4web.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 726.1 kB (47%)

Content Size

1.5 MB

After Optimization

811.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Just4web.cz main page is 1.5 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. 55% of websites need less resources to load. Javascripts take 883.4 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 43.0 kB

  • Original 52.9 kB
  • After minification 52.0 kB
  • After compression 9.9 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 43.0 kB or 81% of the original size.

Image Optimization

-9%

Potential reduce by 47.7 kB

  • Original 546.3 kB
  • After minification 498.6 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. Just 4 Web images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 591.6 kB

  • Original 883.4 kB
  • After minification 875.5 kB
  • After compression 291.8 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 591.6 kB or 67% of the original size.

CSS Optimization

-80%

Potential reduce by 43.8 kB

  • Original 54.6 kB
  • After minification 46.8 kB
  • After compression 10.8 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. Just4web.cz needs all CSS files to be minified and compressed as it can save up to 43.8 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 36 (48%)

Requests Now

75

After Optimization

39

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 75 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Just 4 Web. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 23 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

just4web.cz

just4web.cz

612 ms

default.css

default.css

360 ms

mobile.css

mobile.css

357 ms

prettyPhoto.css

prettyPhoto.css

362 ms

easyslider.css

easyslider.css

364 ms

jquery-1.4.3.min.js

jquery-1.4.3.min.js

616 ms

jquery.prettyPhoto.js

jquery.prettyPhoto.js

376 ms

jquery-ui-1.10.1.custom.min.js

jquery-ui-1.10.1.custom.min.js

1069 ms

js.js

js.js

596 ms

maxlength.js

maxlength.js

597 ms

easyslider1.7.js

easyslider1.7.js

600 ms

js

js

19 ms

japi_mapy.js

japi_mapy.js

629 ms

conversion.js

conversion.js

18 ms

retargeting.js

retargeting.js

449 ms

platform.js

platform.js

161 ms

fbevents.js

fbevents.js

9 ms

analytics.js

analytics.js

29 ms

logo_200.png

logo_200.png

250 ms

lupa.png

lupa.png

128 ms

webove-stranky.png

webove-stranky.png

244 ms

internetovy-marketing.png

internetovy-marketing.png

245 ms

moderni-skola.png

moderni-skola.png

241 ms

kontakt.png

kontakt.png

245 ms

201511241706_zspolna.png

201511241706_zspolna.png

722 ms

201410091600_cerekec.jpg

201410091600_cerekec.jpg

472 ms

201502101011_ssptaji.jpg

201502101011_ssptaji.jpg

476 ms

datum.png

datum.png

364 ms

googleadwords_250.png

googleadwords_250.png

486 ms

googleanalytics_250.png

googleanalytics_250.png

486 ms

mail.png

mail.png

485 ms

phone2.png

phone2.png

593 ms

social-icons-sidebar.png

social-icons-sidebar.png

713 ms

184 ms

102 ms

retargeting

retargeting

164 ms

common.js

common.js

27 ms

map.js

map.js

28 ms

util.js

util.js

28 ms

marker.js

marker.js

81 ms

left.png

left.png

570 ms

right.png

right.png

573 ms

collect

collect

62 ms

onion.js

onion.js

33 ms

openhand_8_8.cur

openhand_8_8.cur

38 ms

ViewportInfoService.GetViewportInfo

ViewportInfoService.GetViewportInfo

86 ms

stats.js

stats.js

9 ms

controls.js

controls.js

15 ms

101 ms

transparent.png

transparent.png

43 ms

css

css

72 ms

map-mark-shadow.png

map-mark-shadow.png

542 ms

google4.png

google4.png

18 ms

mapcnt6.png

mapcnt6.png

18 ms

sv5.png

sv5.png

34 ms

tmapctrl.png

tmapctrl.png

28 ms

cb_scout5.png

cb_scout5.png

29 ms

tmapctrl4.png

tmapctrl4.png

27 ms

imgs8.png

imgs8.png

27 ms

vt

vt

53 ms

vt

vt

40 ms

vt

vt

52 ms

vt

vt

47 ms

vt

vt

52 ms

vt

vt

45 ms

vt

vt

69 ms

vt

vt

73 ms

vt

vt

92 ms

vt

vt

91 ms

vt

vt

70 ms

vt

vt

75 ms

vt

vt

101 ms

vt

vt

99 ms

vt

vt

91 ms

vt

vt

98 ms

vt

vt

117 ms

zN7GBFwfMP4uA6AR0HCoLQ.ttf

zN7GBFwfMP4uA6AR0HCoLQ.ttf

6 ms

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

RxZJdnzeo3R5zSexge8UUaCWcynf_cDxXwCLxiixG1c.ttf

9 ms

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

Hgo13k-tfSpn0qi1SFdUfaCWcynf_cDxXwCLxiixG1c.ttf

16 ms

d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf

d-6IYplOFocCacKzxwXSOKCWcynf_cDxXwCLxiixG1c.ttf

15 ms

AuthenticationService.Authenticate

AuthenticationService.Authenticate

221 ms

Accessibility Review

just4web.cz accessibility score

93

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Links do not have a discernible name

Best Practices

just4web.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

High

Page has valid source maps

SEO Factors

just4web.cz SEO score

89

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Just4web.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech 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 Just4web.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

just4web.cz

Open Graph description is not detected on the main page of Just 4 Web. 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: