Report Summary

  • 36

    Performance

    Renders faster than
    56% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

skolanavyku.cz

Škola návyků

Page Load Speed

8.5 sec in total

First Response

866 ms

Resources Loaded

7.5 sec

Page Rendered

157 ms

skolanavyku.cz screenshot

About Website

Visit skolanavyku.cz now to see the best up-to-date Skolanavyku content for Czech Republic and also check out these interesting facts you probably never knew about skolanavyku.cz

Přijmi 30 denní výzvu a vytvoř si nové návyky, které promění tvůj rok 2016 v nejlepší rok života! Čeká tě 5 tajných kroků [...]

Visit skolanavyku.cz

Key Findings

We analyzed Skolanavyku.cz page load time and found that the first response time was 866 ms and then it took 7.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

skolanavyku.cz performance score

36

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.0 s

10/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

2/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value1.035

2/100

15%

TTI (Time to Interactive)

Value8.1 s

41/100

10%

Network Requests Diagram

866 ms

style.css

112 ms

content.css

319 ms

content.css

217 ms

content.css

222 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Skolanavyku.cz, 10% (3 requests) were made to Fonts.gstatic.com and 7% (2 requests) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (866 ms) relates to the external source Vstup.skolanavyku.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 308.8 kB (70%)

Content Size

439.2 kB

After Optimization

130.4 kB

In fact, the total size of Skolanavyku.cz main page is 439.2 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 264.6 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 19.1 kB

  • Original 26.5 kB
  • After minification 26.1 kB
  • After compression 7.4 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. 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 19.1 kB or 72% of the original size.

Image Optimization

-24%

Potential reduce by 5.8 kB

  • Original 24.3 kB
  • After minification 18.6 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. Obviously, Skolanavyku needs image optimization as it can save up to 5.8 kB or 24% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-67%

Potential reduce by 176.6 kB

  • Original 264.6 kB
  • After minification 255.7 kB
  • After compression 88.0 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 176.6 kB or 67% of the original size.

CSS Optimization

-87%

Potential reduce by 107.4 kB

  • Original 123.7 kB
  • After minification 96.8 kB
  • After compression 16.3 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. Skolanavyku.cz needs all CSS files to be minified and compressed as it can save up to 107.4 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (77%)

Requests Now

26

After Optimization

6

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Skolanavyku. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

skolanavyku.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.

Best Practices

skolanavyku.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

Page has valid source maps

SEO Factors

skolanavyku.cz SEO score

86

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

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

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Skolanavyku.cz can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else), while the claimed language is Czech. Our system also found out that Skolanavyku.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 data is detected on the main page of Skolanavyku. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: