Tools & Wizards About Us

Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 67

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

aktivnistudium.cz

Aktivnistudium.cz: vysok? ?koly, kurzy, CD (angli?tina, n?m?ina, ?pan?l?tina), dou?ov?n?

Page Load Speed

19.7 sec in total

First Response

731 ms

Resources Loaded

18.8 sec

Page Rendered

187 ms

About Website

Click here to check amazing Aktivnistudium content. Otherwise, check out these important facts you probably never knew about aktivnistudium.cz

Angli?tina on-line, jazykov? ?kola, p?ij?mac? zkou?ky na V?, nab?dka zam?stn?n? a brig?d.

Visit aktivnistudium.cz

Key Findings

We analyzed Aktivnistudium.cz page load time and found that the first response time was 731 ms and then it took 19 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

aktivnistudium.cz performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

82/100

10%

LCP (Largest Contentful Paint)

Value3.4 s

67/100

25%

SI (Speed Index)

Value5.0 s

64/100

10%

TBT (Total Blocking Time)

Value480 ms

60/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value6.7 s

56/100

10%

Network Requests Diagram

www.aktivnistudium.cz

731 ms

style.css

204 ms

adx.js

396 ms

show_ads.js

5 ms

space.gif

211 ms

Our browser made a total of 35 requests to load all elements on the main page. We found that 54% of them (19 requests) were addressed to the original Aktivnistudium.cz, 11% (4 requests) were made to Googleads.g.doubleclick.net and 11% (4 requests) were made to Tpc.googlesyndication.com. The less responsive or slowest element that took the longest time to load (17.1 sec) relates to the external source C1.navrcholu.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 43.3 kB (61%)

Content Size

70.5 kB

After Optimization

27.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Aktivnistudium.cz main page is 70.5 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. 25% of websites need less resources to load. HTML takes 38.6 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 32.2 kB

  • Original 38.6 kB
  • After minification 30.7 kB
  • After compression 6.4 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 7.9 kB, which is 20% 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 32.2 kB or 83% of the original size.

Image Optimization

-1%

Potential reduce by 18 B

  • Original 2.8 kB
  • After minification 2.8 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. Aktivnistudium images are well optimized though.

JavaScript Optimization

-5%

Potential reduce by 829 B

  • Original 17.1 kB
  • After minification 17.0 kB
  • After compression 16.3 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

-86%

Potential reduce by 10.2 kB

  • Original 11.9 kB
  • After minification 7.9 kB
  • After compression 1.7 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. Aktivnistudium.cz needs all CSS files to be minified and compressed as it can save up to 10.2 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (69%)

Requests Now

32

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Aktivnistudium. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

aktivnistudium.cz accessibility score

67

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

aktivnistudium.cz best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

aktivnistudium.cz SEO score

54

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

High

robots.txt is not valid

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

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Aktivnistudium.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Aktivnistudium.cz main page’s claimed encoding is windows-1250. 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

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