Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 65% of websites

  • 69

    Best Practices

    More advanced features
    available than in
    46% of websites

  • 89

    SEO

    Google-friendlier than
    72% of websites

ujak.cz

Univerzita Jana Amose Komenskeho Praha

Page Load Speed

3.1 sec in total

First Response

362 ms

Resources Loaded

2.5 sec

Page Rendered

226 ms

ujak.cz screenshot

About Website

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

Univerzita J.A.Komenského Praha - vysokoškolské studium Bc, Mgr, doktorské studium. Začněte studovat ihned. Soukromá Univerzita s akreditacemi pro obory Vzdělávání dospělých, Speciální pedagogika, Cel...

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Key Findings

We analyzed Ujak.cz page load time and found that the first response time was 362 ms and then it took 2.7 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

ujak.cz performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

10/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value9.0 s

15/100

10%

TBT (Total Blocking Time)

Value690 ms

44/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value10.2 s

26/100

10%

Network Requests Diagram

ujak.cz

362 ms

www.ujak.cz

445 ms

main.css

127 ms

live.css

251 ms

prettyPhoto.css

256 ms

Our browser made a total of 61 requests to load all elements on the main page. We found that 95% of them (58 requests) were addressed to the original Ujak.cz, 3% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Maps.google.com. The less responsive or slowest element that took the longest time to load (858 ms) belongs to the original domain Ujak.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 548.3 kB (65%)

Content Size

842.4 kB

After Optimization

294.1 kB

In fact, the total size of Ujak.cz main page is 842.4 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. 30% of websites need less resources to load. Javascripts take 542.5 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 31.5 kB

  • Original 40.2 kB
  • After minification 39.7 kB
  • After compression 8.7 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. 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 31.5 kB or 78% of the original size.

Image Optimization

-4%

Potential reduce by 6.1 kB

  • Original 134.9 kB
  • After minification 128.9 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. Ujak images are well optimized though.

JavaScript Optimization

-74%

Potential reduce by 401.9 kB

  • Original 542.5 kB
  • After minification 490.0 kB
  • After compression 140.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 401.9 kB or 74% of the original size.

CSS Optimization

-87%

Potential reduce by 108.9 kB

  • Original 124.7 kB
  • After minification 96.8 kB
  • After compression 15.9 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. Ujak.cz needs all CSS files to be minified and compressed as it can save up to 108.9 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 44 (75%)

Requests Now

59

After Optimization

15

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ujak. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

ujak.cz accessibility score

84

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

ujak.cz best practices score

69

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

High

Registers an unload listener

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

ujak.cz SEO score

89

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 Ujak.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 Ujak.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

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