Tools & Wizards About Us
czech-tutorial.net screenshot

Report Summary

  • 79

    Performance

    Renders faster than
    85% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 64

    SEO

    Google-friendlier than
    24% of websites

czech-tutorial.net

Изучение Чешского языка on-line бесплатно, видео уроки, аудио, правила правописания, русско-чешский словарь, разговорник Чешкого языка

Page Load Speed

6.1 sec in total

First Response

686 ms

Resources Loaded

5 sec

Page Rendered

466 ms

czech-tutorial.net screenshot

About Website

Visit czech-tutorial.net now to see the best up-to-date Czech Tutorial content for Czech Republic and also check out these interesting facts you probably never knew about czech-tutorial.net

Правила чтения в чешском языке, Ударение в чешском языке, бесплатные уроки чешского, обучение для иностранцев, изучение, чешский on-line для каждого

Visit czech-tutorial.net

Key Findings

We analyzed Czech-tutorial.net page load time and found that the first response time was 686 ms and then it took 5.4 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

czech-tutorial.net performance score

79

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

90/100

25%

SI (Speed Index)

Value4.3 s

76/100

10%

TBT (Total Blocking Time)

Value190 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.298

40/100

15%

TTI (Time to Interactive)

Value4.3 s

84/100

10%

Network Requests Diagram

czech-tutorial.net

686 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

276 ms

css_Dhur0raQ-2gIhJNVRB2vARJUUxbGECQLLnEY-g2V1UY.css

279 ms

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276 ms

css_mkE0SI5iKBbTbZgfGwDxwqEjFePlzBxNi83ro6V-rCg.css

288 ms

Our browser made a total of 158 requests to load all elements on the main page. We found that 44% of them (70 requests) were addressed to the original Czech-tutorial.net, 11% (17 requests) were made to W.sharethis.com and 6% (10 requests) were made to Apis.google.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Czech-tutorial.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 658.8 kB (46%)

Content Size

1.4 MB

After Optimization

781.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Czech-tutorial.net main page is 1.4 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. 60% of websites need less resources to load. Javascripts take 673.3 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 112.3 kB

  • Original 135.6 kB
  • After minification 120.6 kB
  • After compression 23.2 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 15.0 kB, which is 11% 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 112.3 kB or 83% of the original size.

Image Optimization

-6%

Potential reduce by 33.5 kB

  • Original 537.4 kB
  • After minification 503.9 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. Czech Tutorial images are well optimized though.

JavaScript Optimization

-65%

Potential reduce by 437.8 kB

  • Original 673.3 kB
  • After minification 620.1 kB
  • After compression 235.5 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 437.8 kB or 65% of the original size.

CSS Optimization

-80%

Potential reduce by 75.1 kB

  • Original 93.9 kB
  • After minification 91.4 kB
  • After compression 18.7 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. Czech-tutorial.net needs all CSS files to be minified and compressed as it can save up to 75.1 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 58 (38%)

Requests Now

153

After Optimization

95

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 153 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Czech Tutorial. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 33 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

czech-tutorial.net

czech-tutorial.net

686 ms

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276 ms

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279 ms

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276 ms

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Accessibility Review

czech-tutorial.net accessibility score

62

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

<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

czech-tutorial.net best practices score

58

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

czech-tutorial.net SEO score

64

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

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

    RU

  • Language Claimed

    RU

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Czech-tutorial.net can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that Czech-tutorial.net 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

czech-tutorial.net

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