Tools & Wizards About Us
kursy.cz screenshot

Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

kursy.cz

Odborné kurzy, semináře, školení a konference Verlag Dashöfer

Page Load Speed

5.4 sec in total

First Response

374 ms

Resources Loaded

4 sec

Page Rendered

1.1 sec

kursy.cz screenshot

About Website

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

Firemní vzdělávání na otevřených kurzech i školení na míru. Kvalitní lektoři, spokojení účastníci, garance odbornosti.

Visit kursy.cz

Key Findings

We analyzed Kursy.cz page load time and found that the first response time was 374 ms and then it took 5 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

kursy.cz performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.2 s

1/100

10%

LCP (Largest Contentful Paint)

Value10.2 s

0/100

25%

SI (Speed Index)

Value10.6 s

7/100

10%

TBT (Total Blocking Time)

Value2,760 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value18.2 s

3/100

10%

Network Requests Diagram

kursy.cz

374 ms

www.kursy.cz

310 ms

www.kursy.cz

656 ms

gtm.js

56 ms

jquery-ui-1.12.1custom.min.css

687 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that 25% of them (17 requests) were addressed to the original Kursy.cz, 62% (42 requests) were made to Image.dashofer.cz and 4% (3 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Image.dashofer.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 128.2 kB (14%)

Content Size

907.8 kB

After Optimization

779.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Kursy.cz main page is 907.8 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. 55% of websites need less resources to load. Javascripts take 474.6 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 109.2 kB

  • Original 136.3 kB
  • After minification 126.4 kB
  • After compression 27.1 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 109.2 kB or 80% of the original size.

Image Optimization

-4%

Potential reduce by 4.7 kB

  • Original 129.7 kB
  • After minification 125.0 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. Kursy images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 13.7 kB

  • Original 474.6 kB
  • After minification 474.6 kB
  • After compression 460.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 538 B

  • Original 167.2 kB
  • After minification 167.2 kB
  • After compression 166.6 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. Kursy.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 31 (51%)

Requests Now

61

After Optimization

30

  • Images
  • JavaScript
  • CSS

The browser has sent 61 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kursy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

kursy.cz

kursy.cz

374 ms

www.kursy.cz

www.kursy.cz

310 ms

www.kursy.cz

www.kursy.cz

656 ms

gtm.js

gtm.js

56 ms

jquery-ui-1.12.1custom.min.css

jquery-ui-1.12.1custom.min.css

687 ms

jquery-ui-1.12.1custom.structure.min.css

jquery-ui-1.12.1custom.structure.min.css

692 ms

jquery-ui-1.12.1custom.theme.min.css

jquery-ui-1.12.1custom.theme.min.css

692 ms

70_bootstrap4_onlib3_style.css

70_bootstrap4_onlib3_style.css

915 ms

all.min.css

all.min.css

1016 ms

jquery-3.3.1.min.js

jquery-3.3.1.min.js

804 ms

jquery.ui-1.12.1custom.min.js

jquery.ui-1.12.1custom.min.js

1004 ms

bootstrap.4.min.js

bootstrap.4.min.js

898 ms

modernizr.4.min.js

modernizr.4.min.js

796 ms

offcanvas.bootstrap.js

offcanvas.bootstrap.js

897 ms

min.js.phtml

min.js.phtml

1106 ms

jquery.cluetip.1.2.5.min.js

jquery.cluetip.1.2.5.min.js

999 ms

cif.basicfuncs.js

cif.basicfuncs.js

1001 ms

cif.onload.js

cif.onload.js

1105 ms

cif.forms.js

cif.forms.js

1110 ms

cif.prospectvalid.bootstrap.js

cif.prospectvalid.bootstrap.js

1111 ms

search.js

search.js

1111 ms

cif.portalfx.js

cif.portalfx.js

1120 ms

offcanvas.js

offcanvas.js

1117 ms

bootstrap-gallery.js

bootstrap-gallery.js

1122 ms

if-b4-breakpoint.min.js

if-b4-breakpoint.min.js

1201 ms

ekko_lightbox.js

ekko_lightbox.js

1205 ms

bootstrap-datepicker.js

bootstrap-datepicker.js

1213 ms

min.js.phtml

min.js.phtml

1251 ms

landing

landing

146 ms

js

js

60 ms

js

js

136 ms

rc.js

rc.js

627 ms

bat.js

bat.js

28 ms

api.js

api.js

39 ms

jquery-disable-with.js

jquery-disable-with.js

1130 ms

loader.js

loader.js

246 ms

logo-xs-70.svg

logo-xs-70.svg

150 ms

logo-70.svg

logo-70.svg

147 ms

logo-print-70.svg

logo-print-70.svg

147 ms

logo_cc_maestro.svg

logo_cc_maestro.svg

144 ms

logo_cc_mastercard.svg

logo_cc_mastercard.svg

150 ms

logo_cc_mastercard_electronic.svg

logo_cc_mastercard_electronic.svg

154 ms

logo_cc_visa.svg

logo_cc_visa.svg

243 ms

logo_cc_visa_electron.svg

logo_cc_visa_electron.svg

241 ms

logo_invoice.svg

logo_invoice.svg

235 ms

vd_logo.svg

vd_logo.svg

241 ms

logo-xs-70.svg

logo-xs-70.svg

239 ms

568975_150x150top.jpg

568975_150x150top.jpg

145 ms

carousel-bkg-202401.jpg

carousel-bkg-202401.jpg

305 ms

silueta.jpg

silueta.jpg

309 ms

429744_150x150top.jpg

429744_150x150top.jpg

211 ms

566743_150x150top.jpg

566743_150x150top.jpg

305 ms

547938_150x150top.jpg

547938_150x150top.jpg

322 ms

290020_150x150top.jpg

290020_150x150top.jpg

336 ms

327514_150x150top.jpg

327514_150x150top.jpg

407 ms

429827_150x150top.jpg

429827_150x150top.jpg

430 ms

567633_150x150top.jpg

567633_150x150top.jpg

442 ms

186870_150x150top.jpg

186870_150x150top.jpg

510 ms

574003_150x150top.jpg

574003_150x150top.jpg

538 ms

409740_150x150top.jpg

409740_150x150top.jpg

547 ms

530734_150x150top.jpg

530734_150x150top.jpg

614 ms

575774_150x150top.jpg

575774_150x150top.jpg

643 ms

299138_150x150top.jpg

299138_150x150top.jpg

650 ms

fa-solid-900.ttf

fa-solid-900.ttf

1087 ms

fa-regular-400.ttf

fa-regular-400.ttf

1122 ms

fa-light-300.ttf

fa-light-300.ttf

816 ms

fa-thin-100.ttf

fa-thin-100.ttf

1396 ms

recaptcha__en.js

recaptcha__en.js

67 ms

Accessibility Review

kursy.cz accessibility score

95

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

kursy.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

kursy.cz SEO score

92

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

    CS

  • Encoding

    ISO-8859-2

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Kursy.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 Kursy.cz main page’s claimed encoding is iso-8859-2. 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

kursy.cz

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