Tools & Wizards About Us
adc.cz screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

adc.cz

ADC Systems - komplexní řešení informačních technologií

Page Load Speed

6.6 sec in total

First Response

1.3 sec

Resources Loaded

4.8 sec

Page Rendered

459 ms

adc.cz screenshot

About Website

Welcome to adc.cz homepage info - get ready to check ADC best content right away, or after learning these important things about adc.cz

Komplexní řešení v oblastech informačních a komunikačních technologií. Poskytovatel připojení k internetu. Vývoj a výroba elektroniky.

Visit adc.cz

Key Findings

We analyzed Adc.cz page load time and found that the first response time was 1.3 sec and then it took 5.3 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

adc.cz performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value8.4 s

2/100

25%

SI (Speed Index)

Value17.4 s

0/100

10%

TBT (Total Blocking Time)

Value3,120 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value30.4 s

0/100

10%

Network Requests Diagram

adc.cz

1292 ms

simple-line-icons.css

55 ms

k2.css

126 ms

content.css

258 ms

front.css

352 ms

Our browser made a total of 133 requests to load all elements on the main page. We found that 65% of them (86 requests) were addressed to the original Adc.cz, 17% (23 requests) were made to Fonts.gstatic.com and 4% (5 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Adc.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 755.3 kB (7%)

Content Size

10.8 MB

After Optimization

10.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Adc.cz main page is 10.8 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 10.1 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 110.5 kB

  • Original 132.3 kB
  • After minification 103.3 kB
  • After compression 21.7 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 29.0 kB, which is 22% 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 110.5 kB or 84% of the original size.

Image Optimization

-6%

Potential reduce by 614.3 kB

  • Original 10.1 MB
  • After minification 9.5 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. ADC images are well optimized though.

JavaScript Optimization

-5%

Potential reduce by 23.0 kB

  • Original 463.6 kB
  • After minification 463.6 kB
  • After compression 440.7 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 7.5 kB

  • Original 83.7 kB
  • After minification 83.6 kB
  • After compression 76.2 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. Adc.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 63 (61%)

Requests Now

103

After Optimization

40

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 103 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ADC. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 37 to 1 for JavaScripts and from 23 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

adc.cz

adc.cz

1292 ms

simple-line-icons.css

simple-line-icons.css

55 ms

k2.css

k2.css

126 ms

content.css

content.css

258 ms

front.css

front.css

352 ms

responsive.css

responsive.css

370 ms

hydrogen_11.css

hydrogen_11.css

373 ms

joomla.css

joomla.css

351 ms

icomoon.css

icomoon.css

391 ms

hydrogen-joomla_11.css

hydrogen-joomla_11.css

470 ms

custom_11.css

custom_11.css

589 ms

chosen.css

chosen.css

469 ms

finder.css

finder.css

486 ms

jquery.min.js

jquery.min.js

605 ms

jquery-noconflict.js

jquery-noconflict.js

514 ms

jquery-migrate.min.js

jquery-migrate.min.js

597 ms

k2.frontend.js

k2.frontend.js

597 ms

caption.js

caption.js

604 ms

script.js

script.js

641 ms

api.js

api.js

72 ms

script.js

script.js

711 ms

iframe-height.min.js

iframe-height.min.js

710 ms

bootstrap.min.js

bootstrap.min.js

711 ms

js

js

81 ms

chosen.jquery.min.js

chosen.jquery.min.js

744 ms

jquery.autocomplete.min.js

jquery.autocomplete.min.js

745 ms

settings.css

settings.css

660 ms

font-awesome.css

font-awesome.css

661 ms

pe-icon-7-stroke.css

pe-icon-7-stroke.css

707 ms

css

css

51 ms

jquery.themepunch.tools.min.js

jquery.themepunch.tools.min.js

837 ms

jquery.themepunch.revolution.min.js

jquery.themepunch.revolution.min.js

848 ms

css

css

64 ms

splide.min.js

splide.min.js

43 ms

splide.min.css

splide.min.css

48 ms

main.js

main.js

836 ms

popper.min.js

popper.min.js

705 ms

tippy-bundle.umd.js

tippy-bundle.umd.js

847 ms

helper.js

helper.js

854 ms

swiper-bundle.min.css

swiper-bundle.min.css

46 ms

swiper-bundle.min.js

swiper-bundle.min.js

61 ms

animate.min.css

animate.min.css

48 ms

main.js

main.js

853 ms

swiper-bundle.min.css

swiper-bundle.min.css

20 ms

swiper-bundle.min.js

swiper-bundle.min.js

19 ms

css2

css2

16 ms

css2

css2

26 ms

recaptcha__en.js

recaptcha__en.js

26 ms

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2151305311-min.jpg

196 ms

full-frame-shot-sound-mixer-min.jpg

full-frame-shot-sound-mixer-min.jpg

194 ms

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ADC_vyvoj_vyroba2_1.jpg

293 ms

adc_logo.svg

adc_logo.svg

290 ms

search-icon.svg

search-icon.svg

293 ms

icons-home-28.svg

icons-home-28.svg

288 ms

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ADC_vyvoj_vyroba3_1.jpg

1120 ms

ADC%20obrazek%20(1).jpg

ADC%20obrazek%20(1).jpg

943 ms

server_icon.svg

server_icon.svg

291 ms

ADCnet.svg

ADCnet.svg

355 ms

ADCweb_ikonky_VV.png

ADCweb_ikonky_VV.png

366 ms

adc_logo.svg

adc_logo.svg

353 ms

adc_tracker.svg

adc_tracker.svg

356 ms

ADCweb_ikonky_SEA.png

ADCweb_ikonky_SEA.png

578 ms

ADCweb_ikonky_loxone.png

ADCweb_ikonky_loxone.png

583 ms

partner_dell.png

partner_dell.png

502 ms

partner_kerio.png

partner_kerio.png

503 ms

sophos.png

sophos.png

605 ms

eset.png

eset.png

615 ms

partner_xerox.png

partner_xerox.png

704 ms

loxone.png

loxone.png

909 ms

eda.png

eda.png

926 ms

hospic.png

hospic.png

952 ms

dobry_andel.png

dobry_andel.png

821 ms

Logo_organizace_%C4%8Clov%C4%9Bk_v_t%C3%ADsni.png

Logo_organizace_%C4%8Clov%C4%9Bk_v_t%C3%ADsni.png

979 ms

Logo_of_UNICEF.svg.png

Logo_of_UNICEF.svg.png

1040 ms

cun_cz.png

cun_cz.png

1056 ms

konto.png

konto.png

1074 ms

bnp.png

bnp.png

1083 ms

techsys.png

techsys.png

1096 ms

alkom.png

alkom.png

1163 ms

ref_box_pharmazet.png

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1172 ms

divesoft_logo_horizontal_red.png

divesoft_logo_horizontal_red.png

1196 ms

khdk.jpg

khdk.jpg

1211 ms

akita.png

akita.png

1419 ms

Location.svg

Location.svg

1226 ms

Call.svg

Call.svg

1252 ms

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103 ms

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131 ms

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251 ms

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104 ms

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104 ms

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131 ms

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131 ms

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132 ms

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133 ms

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8vIh7wUr0m80wwYf0QCXZzYzUoTg-CSvZX4Vlf1fe6TVfQwz_Q.ttf

156 ms

Message.svg

Message.svg

1253 ms

facebook_f_white.svg

facebook_f_white.svg

1283 ms

JTUHjIg1_i6t8kCHKm4532VJOt5-QNFgpCuM70w-.ttf

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108 ms

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108 ms

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109 ms

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110 ms

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110 ms

embed

embed

227 ms

full-frame-shot-sound-mixer-min.jpg

full-frame-shot-sound-mixer-min.jpg

1434 ms

2151305311-min.jpg

2151305311-min.jpg

1387 ms

revolution.extension.carousel.min.js

revolution.extension.carousel.min.js

136 ms

revolution.extension.video.min.js

revolution.extension.video.min.js

134 ms

revolution.extension.slideanims.min.js

revolution.extension.slideanims.min.js

135 ms

revolution.extension.actions.min.js

revolution.extension.actions.min.js

131 ms

revolution.extension.layeranimation.min.js

revolution.extension.layeranimation.min.js

246 ms

revolution.extension.kenburn.min.js

revolution.extension.kenburn.min.js

129 ms

revolution.extension.navigation.min.js

revolution.extension.navigation.min.js

271 ms

revolution.extension.migration.min.js

revolution.extension.migration.min.js

269 ms

revolution.extension.parallax.min.js

revolution.extension.parallax.min.js

273 ms

anchor

anchor

77 ms

ADC_vyvoj_vyroba2_1.jpg

ADC_vyvoj_vyroba2_1.jpg

1684 ms

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37 ms

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21 ms

RedHatDisplay-Medium.woff

RedHatDisplay-Medium.woff

1263 ms

js

js

98 ms

adc-30-year.png

adc-30-year.png

1238 ms

styles__ltr.css

styles__ltr.css

7 ms

recaptcha__en.js

recaptcha__en.js

11 ms

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33 ms

webworker.js

webworker.js

72 ms

logo_48.png

logo_48.png

21 ms

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15 ms

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15 ms

recaptcha__en.js

recaptcha__en.js

29 ms

Accessibility Review

adc.cz accessibility score

85

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

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.

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

adc.cz best practices score

83

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

Page has valid source maps

SEO Factors

adc.cz SEO score

85

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

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Adc.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 Adc.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

adc.cz

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