Tools & Wizards About Us
descart.cz screenshot

Report Summary

  • 44

    Performance

    Renders faster than
    63% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 83% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 95

    SEO

    Google-friendlier than
    90% of websites

descart.cz

DVPP - Homepage

Page Load Speed

3 sec in total

First Response

329 ms

Resources Loaded

2.4 sec

Page Rendered

269 ms

descart.cz screenshot

About Website

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

Vzdělávací agentura Descartes, vzdělávací kurzy pro učitele, akreditace MŠMT

Visit descart.cz

Key Findings

We analyzed Descart.cz page load time and found that the first response time was 329 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

descart.cz performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.5 s

6/100

10%

LCP (Largest Contentful Paint)

Value10.1 s

0/100

25%

SI (Speed Index)

Value6.5 s

39/100

10%

TBT (Total Blocking Time)

Value320 ms

77/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value11.6 s

18/100

10%

Network Requests Diagram

descart.cz

329 ms

descart.cz

419 ms

www.descart.cz

580 ms

js

62 ms

app.css

225 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 56% of them (19 requests) were addressed to the original Descart.cz, 18% (6 requests) were made to Fonts.gstatic.com and 6% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (580 ms) belongs to the original domain Descart.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 100.6 kB (8%)

Content Size

1.2 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Descart.cz main page is 1.2 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. 50% of websites need less resources to load. Images take 990.1 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 25.7 kB

  • Original 33.0 kB
  • After minification 31.9 kB
  • After compression 7.3 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 25.7 kB or 78% of the original size.

Image Optimization

-3%

Potential reduce by 25.3 kB

  • Original 990.1 kB
  • After minification 964.8 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. Descart images are well optimized though.

JavaScript Optimization

-33%

Potential reduce by 43.7 kB

  • Original 132.6 kB
  • After minification 132.6 kB
  • After compression 88.9 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 43.7 kB or 33% of the original size.

CSS Optimization

-16%

Potential reduce by 5.9 kB

  • Original 36.1 kB
  • After minification 36.1 kB
  • After compression 30.3 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. Descart.cz needs all CSS files to be minified and compressed as it can save up to 5.9 kB or 16% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (46%)

Requests Now

24

After Optimization

13

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Descart. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

descart.cz

descart.cz

329 ms

descart.cz

descart.cz

419 ms

www.descart.cz

www.descart.cz

580 ms

js

js

62 ms

app.css

app.css

225 ms

base.css

base.css

318 ms

font-awesome.min.css

font-awesome.min.css

325 ms

modernizr.js

modernizr.js

348 ms

jquery-latest.min.js

jquery-latest.min.js

457 ms

foundation.min.js

foundation.min.js

457 ms

common.js

common.js

346 ms

js

js

50 ms

analytics.js

analytics.js

19 ms

collect

collect

57 ms

collect

collect

54 ms

css

css

57 ms

020-dankovice-optimized.jpg

020-dankovice-optimized.jpg

549 ms

019-webinar.png

019-webinar.png

332 ms

001-praha-sm.jpg

001-praha-sm.jpg

215 ms

002-brno-petrov-sm.jpg

002-brno-petrov-sm.jpg

208 ms

003-olomouc-sm2.jpg

003-olomouc-sm2.jpg

213 ms

007-na-sirku.png

007-na-sirku.png

545 ms

sdk.js

sdk.js

58 ms

kurzy_bg.png

kurzy_bg.png

449 ms

logo-descartes-white.svg

logo-descartes-white.svg

255 ms

4iCs6KVjbNBYlgoKcQ7z.ttf

4iCs6KVjbNBYlgoKcQ7z.ttf

35 ms

4iCv6KVjbNBYlgoC1CzjvmyI.ttf

4iCv6KVjbNBYlgoC1CzjvmyI.ttf

61 ms

4iCv6KVjbNBYlgoCxCvjvmyI.ttf

4iCv6KVjbNBYlgoCxCvjvmyI.ttf

70 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

372 ms

4iCu6KVjbNBYlgoKej76l0w.ttf

4iCu6KVjbNBYlgoKej76l0w.ttf

86 ms

4iCp6KVjbNBYlgoKejZftVyBN4Q.ttf

4iCp6KVjbNBYlgoKejZftVyBN4Q.ttf

86 ms

4iCp6KVjbNBYlgoKejZPslyBN4Q.ttf

4iCp6KVjbNBYlgoKejZPslyBN4Q.ttf

86 ms

sdk.js

sdk.js

11 ms

92 ms

Accessibility Review

descart.cz accessibility score

94

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

Links do not have a discernible name

Best Practices

descart.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

SEO Factors

descart.cz SEO score

95

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 Descart.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 Descart.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

descart.cz

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