Tools & Wizards About Us
doucovani.cz screenshot

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 46

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

doucovani.cz

Úvodní strana - Doučování.cz

Page Load Speed

2.1 sec in total

First Response

414 ms

Resources Loaded

1.6 sec

Page Rendered

71 ms

doucovani.cz screenshot

About Website

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

Společnost doučování.cz s.r.o. vznikla transformací tehdejšího největšího studentského spolku lektorů v ČR. V současné době zajišťujeme především individuální výuku se zaměřením na přípravu žáků na př...

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Key Findings

We analyzed Doucovani.cz page load time and found that the first response time was 414 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

doucovani.cz performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.3 s

98/100

10%

LCP (Largest Contentful Paint)

Value1.3 s

100/100

25%

SI (Speed Index)

Value1.7 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value1.3 s

100/100

10%

Network Requests Diagram

doucovani.cz

414 ms

index.php

125 ms

style.css

94 ms

stare.css

188 ms

animation.minified.js

189 ms

Our browser made a total of 17 requests to load all elements on the main page. We found that 94% of them (16 requests) were addressed to the original Doucovani.cz, 6% (1 request) were made to Toplist.cz. The less responsive or slowest element that took the longest time to load (460 ms) relates to the external source Toplist.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 37.3 kB (68%)

Content Size

55.1 kB

After Optimization

17.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Doucovani.cz main page is 55.1 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. Only 10% of websites need less resources to load. CSS take 20.4 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 11.3 kB

  • Original 14.2 kB
  • After minification 11.6 kB
  • After compression 2.8 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 2.6 kB, which is 18% 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 11.3 kB or 80% of the original size.

Image Optimization

-5%

Potential reduce by 496 B

  • Original 9.9 kB
  • After minification 9.4 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. Doucovani images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 7.7 kB

  • Original 10.7 kB
  • After minification 10.7 kB
  • After compression 2.9 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 7.7 kB or 72% of the original size.

CSS Optimization

-87%

Potential reduce by 17.7 kB

  • Original 20.4 kB
  • After minification 12.2 kB
  • After compression 2.7 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. Doucovani.cz needs all CSS files to be minified and compressed as it can save up to 17.7 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (40%)

Requests Now

15

After Optimization

9

  • Images
  • JavaScript
  • CSS

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

Network Requests Diagram

doucovani.cz

doucovani.cz

414 ms

index.php

index.php

125 ms

style.css

style.css

94 ms

stare.css

stare.css

188 ms

animation.minified.js

animation.minified.js

189 ms

top_bkground.jpg

top_bkground.jpg

95 ms

top_title.gif

top_title.gif

95 ms

top_towns.gif

top_towns.gif

99 ms

menubkground.gif

menubkground.gif

188 ms

top_right.jpg

top_right.jpg

188 ms

pixel.gif

pixel.gif

189 ms

itemborder.gif

itemborder.gif

189 ms

dot.gif

dot.gif

197 ms

tutoring_doucko.gif

tutoring_doucko.gif

206 ms

tutoring_jazyk.gif

tutoring_jazyk.gif

282 ms

index_telefony.gif

index_telefony.gif

282 ms

count.asp

count.asp

460 ms

Accessibility Review

doucovani.cz accessibility score

46

Accessibility Issues

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

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

Form elements do not have associated labels

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

doucovani.cz best practices score

75

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

Serves images with low resolution

SEO Factors

doucovani.cz SEO score

69

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

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CZ

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Doucovani.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and it does not match the claimed language. Our system also found out that Doucovani.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

doucovani.cz

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