Tools & Wizards About Us
jaso.cz screenshot

Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 99

    SEO

    Google-friendlier than
    93% of websites

jaso.cz

Alkohol na jednom místě. PIVO, VÍNO, DESTILÁTY | JASO - DISTRIBUTOR, spol. s r.o.

Page Load Speed

5.6 sec in total

First Response

699 ms

Resources Loaded

4.4 sec

Page Rendered

544 ms

jaso.cz screenshot

About Website

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

Prodej piva, alkoholu, vína a potravin. Snadné objednání, rychlé doručení po Brně, celá ČR-následující den. Půjčování výčepů.

Visit jaso.cz

Key Findings

We analyzed Jaso.cz page load time and found that the first response time was 699 ms and then it took 4.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

jaso.cz performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value15.3 s

0/100

10%

LCP (Largest Contentful Paint)

Value23.8 s

0/100

25%

SI (Speed Index)

Value15.4 s

0/100

10%

TBT (Total Blocking Time)

Value490 ms

59/100

30%

CLS (Cumulative Layout Shift)

Value0.118

85/100

15%

TTI (Time to Interactive)

Value25.2 s

0/100

10%

Network Requests Diagram

jaso.cz

699 ms

jaso.cz

432 ms

www.jaso.cz

1683 ms

notifikuj.min.js

521 ms

gtm.js

111 ms

Our browser made a total of 92 requests to load all elements on the main page. We found that 73% of them (67 requests) were addressed to the original Jaso.cz, 4% (4 requests) were made to Fonts.gstatic.com and 3% (3 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Jaso.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.7 MB (35%)

Content Size

4.9 MB

After Optimization

3.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jaso.cz main page is 4.9 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

-89%

Potential reduce by 589.5 kB

  • Original 662.4 kB
  • After minification 633.1 kB
  • After compression 72.9 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 589.5 kB or 89% of the original size.

Image Optimization

-4%

Potential reduce by 109.3 kB

  • Original 2.5 MB
  • After minification 2.4 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. JASO images are well optimized though.

JavaScript Optimization

-59%

Potential reduce by 997.8 kB

  • Original 1.7 MB
  • After minification 1.7 MB
  • After compression 695.9 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 997.8 kB or 59% of the original size.

CSS Optimization

-77%

Potential reduce by 24.0 kB

  • Original 31.0 kB
  • After minification 31.0 kB
  • After compression 7.0 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. Jaso.cz needs all CSS files to be minified and compressed as it can save up to 24.0 kB or 77% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (33%)

Requests Now

76

After Optimization

51

  • Images
  • JavaScript
  • CSS

The browser has sent 76 CSS, Javascripts, AJAX and image requests in order to completely render the main page of JASO. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

jaso.cz

jaso.cz

699 ms

jaso.cz

jaso.cz

432 ms

www.jaso.cz

www.jaso.cz

1683 ms

notifikuj.min.js

notifikuj.min.js

521 ms

gtm.js

gtm.js

111 ms

recorder.js

recorder.js

181 ms

m13pyrk1n4

m13pyrk1n4

63 ms

css2

css2

58 ms

font-awesome.min.css

font-awesome.min.css

421 ms

styles.css

styles.css

1102 ms

jquery.min.js

jquery.min.js

43 ms

jquery-ui.min.js

jquery-ui.min.js

48 ms

config.js.php

config.js.php

911 ms

js-scripts.js

js-scripts.js

955 ms

jsphp-scripts.js

jsphp-scripts.js

644 ms

api.js

api.js

94 ms

clarity.js

clarity.js

21 ms

landing

landing

147 ms

js

js

67 ms

analytics.js

analytics.js

32 ms

destination

destination

138 ms

collect

collect

7 ms

collect

collect

9 ms

document-ready.js

document-ready.js

126 ms

delivery-truck.png

delivery-truck.png

295 ms

87502-11.png

87502-11.png

795 ms

24-hours_y2.png

24-hours_y2.png

282 ms

sale.png

sale.png

281 ms

box_y2.png

box_y2.png

286 ms

profile.png

profile.png

284 ms

home.png

home.png

304 ms

cz-icon.png

cz-icon.png

144 ms

DE.jpg

DE.jpg

98 ms

SP.jpg

SP.jpg

97 ms

IT.jpg

IT.jpg

143 ms

logo_2.png

logo_2.png

98 ms

lupa_icon.png

lupa_icon.png

143 ms

person_icon.png

person_icon.png

187 ms

cart_icon.png

cart_icon.png

196 ms

menu_icon.png

menu_icon.png

198 ms

akce_2.png

akce_2.png

197 ms

darek%20(3).png

darek%20(3).png

193 ms

pivo%20ok.png

pivo%20ok.png

201 ms

vino.png

vino.png

281 ms

alko.png

alko.png

286 ms

nealko.png

nealko.png

293 ms

potraviny.png

potraviny.png

296 ms

heets.jpg

heets.jpg

293 ms

sklo.png

sklo.png

300 ms

vycep.png

vycep.png

376 ms

degustace.png

degustace.png

387 ms

poukaz.png

poukaz.png

388 ms

akce_1.png

akce_1.png

388 ms

slider_bg.jpg

slider_bg.jpg

573 ms

chladak_1%20(003).jpg

chladak_1%20(003).jpg

689 ms

slider_pivo.jpg

slider_pivo.jpg

778 ms

slider_rumy.jpg

slider_rumy.jpg

567 ms

slider_vino.jpg

slider_vino.jpg

481 ms

slider_maso.jpg

slider_maso.jpg

488 ms

05%20pouze%2010%20513x413_desitka%20(002).jpg

05%20pouze%2010%20513x413_desitka%20(002).jpg

576 ms

05%2002%20nealko%20513x413_c%20(002).jpg

05%2002%20nealko%20513x413_c%20(002).jpg

582 ms

05%201%20513x413_v%20(002).jpg

05%201%20513x413_v%20(002).jpg

661 ms

513x413px_Rampu%C5%A1%C3%A1k-banner-01.jpg

513x413px_Rampu%C5%A1%C3%A1k-banner-01.jpg

779 ms

JASO_registrace_pro_VO_ceny_banner_513x413_alkohol_v1.jpg

JASO_registrace_pro_VO_ceny_banner_513x413_alkohol_v1.jpg

671 ms

ajax-loader.gif

ajax-loader.gif

685 ms

Svoboda.jpg

Svoboda.jpg

779 ms

recaptcha__en.js

recaptcha__en.js

91 ms

rc.js

rc.js

687 ms

gjs.php

gjs.php

658 ms

znacka_4.jpg

znacka_4.jpg

730 ms

1Ptyg83HX_SGhgqO0yLcmjzUAuWexZNRwaA.ttf

1Ptyg83HX_SGhgqO0yLcmjzUAuWexZNRwaA.ttf

88 ms

1Ptyg83HX_SGhgqO0yLcmjzUAuWexc1RwaA.ttf

1Ptyg83HX_SGhgqO0yLcmjzUAuWexc1RwaA.ttf

90 ms

1Ptyg83HX_SGhgqO0yLcmjzUAuWexRNRwaA.ttf

1Ptyg83HX_SGhgqO0yLcmjzUAuWexRNRwaA.ttf

101 ms

1Ptyg83HX_SGhgqO0yLcmjzUAuWexXRWwaA.ttf

1Ptyg83HX_SGhgqO0yLcmjzUAuWexXRWwaA.ttf

101 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

689 ms

jager%2004.png

jager%2004.png

703 ms

znacka%20(1).jpg

znacka%20(1).jpg

704 ms

mattoni.jpg

mattoni.jpg

716 ms

facebook.png

facebook.png

716 ms

insta.jpg

insta.jpg

722 ms

cappy%20akce.jpg

cappy%20akce.jpg

695 ms

close.png

close.png

703 ms

costaross%20cena.png

costaross%20cena.png

835 ms

sipka_nahoru.png

sipka_nahoru.png

756 ms

sale.png

sale.png

675 ms

24-hours_y2.png

24-hours_y2.png

681 ms

delivery-truck.png

delivery-truck.png

698 ms

profile.png

profile.png

714 ms

box_y2.png

box_y2.png

764 ms

home.png

home.png

747 ms

retargeting

retargeting

101 ms

c.gif

c.gif

8 ms

Accessibility Review

jaso.cz accessibility score

89

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

jaso.cz best practices score

67

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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

jaso.cz SEO score

99

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

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

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

jaso.cz

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