Report Summary

  • 40

    Performance

    Renders faster than
    60% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 89

    SEO

    Google-friendlier than
    67% of websites

chc.cz

Jazyková a vzdělávací agentura Channel Crossings - Channel Crossings

Page Load Speed

783 ms in total

First Response

346 ms

Resources Loaded

360 ms

Page Rendered

77 ms

chc.cz screenshot

About Website

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

Channel Crossings nabízí Studium v zahraničí, Letní jazykové pobyty, Soft skills, jazykové kurzy, překlady a tlumočení a elektronicky ověřené soudní překlady.

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Key Findings

We analyzed Chc.cz page load time and found that the first response time was 346 ms and then it took 437 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

chc.cz performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

44/100

25%

SI (Speed Index)

Value10.9 s

6/100

10%

TBT (Total Blocking Time)

Value940 ms

29/100

30%

CLS (Cumulative Layout Shift)

Value0.028

100/100

15%

TTI (Time to Interactive)

Value12.9 s

13/100

10%

Network Requests Diagram

chc.cz

346 ms

Our browser made a total of 1 request to load all elements on the main page. We found that all of those requests were addressed to Chc.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (346 ms) belongs to the original domain Chc.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 128.6 kB (27%)

Content Size

473.9 kB

After Optimization

345.3 kB

In fact, the total size of Chc.cz main page is 473.9 kB. This result falls within the top 5000 of lightweight and thus fast loading web pages. Only a small number of websites need less resources to load. Images take 283.4 kB which makes up the majority of the site volume.

HTML Optimization

-30%

Potential reduce by 54 B

  • Original 179 B
  • After minification 177 B
  • After compression 125 B

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 54 B or 30% of the original size.

Image Optimization

-2%

Potential reduce by 4.3 kB

  • Original 283.4 kB
  • After minification 279.1 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. Chc images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 92.3 kB

  • Original 151.7 kB
  • After minification 143.8 kB
  • After compression 59.4 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 92.3 kB or 61% of the original size.

CSS Optimization

-83%

Potential reduce by 32.0 kB

  • Original 38.7 kB
  • After minification 34.0 kB
  • After compression 6.7 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. Chc.cz needs all CSS files to be minified and compressed as it can save up to 32.0 kB or 83% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

0

After Optimization

0

Besides the initial HTML request, no CSS, Javascripts, AJAX or image files were requested in the course of web page rendering.

Accessibility Review

chc.cz accessibility score

78

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

[role]s are not contained by their required parent element

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

chc.cz best practices score

75

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

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

chc.cz SEO score

89

Search Engine Optimization Advices

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

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

    N/A

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chc.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 Chc.cz main page’s claimed encoding is . 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 Chc. 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: