Tools & Wizards About Us
ucebnice.com screenshot

Report Summary

  • 28

    Performance

    Renders faster than
    47% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 40% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

ucebnice.com

Učebnice pro základní a střední školy | Ucebnice.com

Page Load Speed

6.5 sec in total

First Response

291 ms

Resources Loaded

5.4 sec

Page Rendered

786 ms

ucebnice.com screenshot

About Website

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

Nejširší nabídka učebnic pro základní a střední školy. Nakladatelství: Alexander, ARCH, Chamb, DYS, Flössler, Kupka, NČGS, Septima, SPN...

Visit ucebnice.com

Key Findings

We analyzed Ucebnice.com page load time and found that the first response time was 291 ms and then it took 6.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

ucebnice.com performance score

28

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value15.4 s

0/100

10%

LCP (Largest Contentful Paint)

Value24.9 s

0/100

25%

SI (Speed Index)

Value15.8 s

0/100

10%

TBT (Total Blocking Time)

Value670 ms

45/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value24.6 s

0/100

10%

Network Requests Diagram

ucebnice.com

291 ms

ucebnice.com

2290 ms

twemoji.js

362 ms

wp-emoji.js

272 ms

style.css

471 ms

Our browser made a total of 80 requests to load all elements on the main page. We found that 88% of them (70 requests) were addressed to the original Ucebnice.com, 5% (4 requests) were made to Unpkg.com and 3% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (2.3 sec) belongs to the original domain Ucebnice.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 3.4 MB (81%)

Content Size

4.1 MB

After Optimization

769.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Ucebnice.com main page is 4.1 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. CSS take 2.4 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 310.7 kB

  • Original 356.5 kB
  • After minification 317.1 kB
  • After compression 45.9 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 39.5 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 310.7 kB or 87% of the original size.

Image Optimization

-23%

Potential reduce by 52.4 kB

  • Original 231.2 kB
  • After minification 178.8 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. Obviously, Ucebnice needs image optimization as it can save up to 52.4 kB or 23% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-75%

Potential reduce by 884.1 kB

  • Original 1.2 MB
  • After minification 1.0 MB
  • After compression 301.2 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 884.1 kB or 75% of the original size.

CSS Optimization

-90%

Potential reduce by 2.1 MB

  • Original 2.4 MB
  • After minification 2.0 MB
  • After compression 243.5 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. Ucebnice.com needs all CSS files to be minified and compressed as it can save up to 2.1 MB or 90% of the original size.

Requests Breakdown

Number of requests can be reduced by 56 (76%)

Requests Now

74

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 74 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ucebnice. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 40 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

ucebnice.com

ucebnice.com

291 ms

ucebnice.com

ucebnice.com

2290 ms

twemoji.js

twemoji.js

362 ms

wp-emoji.js

wp-emoji.js

272 ms

style.css

style.css

471 ms

vendors-style.css

vendors-style.css

284 ms

style.css

style.css

568 ms

slick.css

slick.css

362 ms

recent-post-style.css

recent-post-style.css

472 ms

front.css

front.css

452 ms

chosen.min.css

chosen.min.css

450 ms

jquery.mCustomScrollbar.css

jquery.mCustomScrollbar.css

451 ms

blue.css

blue.css

540 ms

woocommerce-layout.css

woocommerce-layout.css

540 ms

woocommerce.css

woocommerce.css

544 ms

public.css

public.css

564 ms

style.css

style.css

660 ms

dashicons.css

dashicons.css

718 ms

algolia-autocomplete.css

algolia-autocomplete.css

628 ms

app.css

app.css

922 ms

jquery.js

jquery.js

751 ms

public.js

public.js

664 ms

menu.js

menu.js

720 ms

sweetalert2.all.js

sweetalert2.all.js

26 ms

js

js

62 ms

feather-icons

feather-icons

47 ms

feather-icons@4.29.2

feather-icons@4.29.2

14 ms

feather.min.js

feather.min.js

16 ms

textinput.css

textinput.css

401 ms

jquery.blockUI.js

jquery.blockUI.js

402 ms

add-to-cart.js

add-to-cart.js

454 ms

js.cookie.js

js.cookie.js

455 ms

woocommerce.js

woocommerce.js

492 ms

cart-fragments.js

cart-fragments.js

495 ms

underscore.min.js

underscore.min.js

496 ms

wp-util.js

wp-util.js

544 ms

algoliasearch.jquery.js

algoliasearch.jquery.js

952 ms

autocomplete.js

autocomplete.js

861 ms

autocomplete-noconflict.js

autocomplete-noconflict.js

761 ms

vendor.js

vendor.js

765 ms

app.js

app.js

763 ms

alpine.js

alpine.js

764 ms

hoverIntent.js

hoverIntent.js

764 ms

maxmegamenu.js

maxmegamenu.js

764 ms

wp-embed.js

wp-embed.js

765 ms

icheck.min.js

icheck.min.js

856 ms

front.js

front.js

857 ms

radio.js

radio.js

767 ms

checkbox.js

checkbox.js

765 ms

select.js

select.js

854 ms

mselect.js

mselect.js

835 ms

chosen.jquery.min.js

chosen.jquery.min.js

835 ms

jquery.mousewheel.min.js

jquery.mousewheel.min.js

766 ms

jquery.mCustomScrollbar.min.js

jquery.mCustomScrollbar.min.js

766 ms

jquery.mCustomScrollbar.concat.min.js

jquery.mCustomScrollbar.concat.min.js

826 ms

woof_sid.js

woof_sid.js

811 ms

slick.min.js

slick.min.js

803 ms

wppsac-public.js

wppsac-public.js

750 ms

textinput.js

textinput.js

716 ms

load-image.gif

load-image.gif

1435 ms

ceska-posta.png

ceska-posta.png

1435 ms

balik-na-postu.png

balik-na-postu.png

1436 ms

balik-do-ruky.png

balik-do-ruky.png

1437 ms

025-student-150x150.png

025-student-150x150.png

1326 ms

004-notebook-150x150.png

004-notebook-150x150.png

1327 ms

013-teacher-150x150.png

013-teacher-150x150.png

1326 ms

015-school-bag-150x150.png

015-school-bag-150x150.png

1327 ms

047-online-learning-150x150.png

047-online-learning-150x150.png

1327 ms

018-books-150x150.png

018-books-150x150.png

1328 ms

049-test-150x150.png

049-test-150x150.png

1329 ms

035-glue-150x150.png

035-glue-150x150.png

1329 ms

019-blackboard-150x150.png

019-blackboard-150x150.png

1329 ms

wARDj0u

wARDj0u

92 ms

dQNL70YmBhcADHYj9AAA

dQNL70YmBhcADHYj9AAA

67 ms

ucebnice.com

ucebnice.com

1452 ms

blue.png

blue.png

100 ms

js

js

50 ms

analytics.js

analytics.js

19 ms

collect

collect

58 ms

woocommerce-smallscreen.css

woocommerce-smallscreen.css

96 ms

Accessibility Review

ucebnice.com accessibility score

74

Accessibility Issues

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

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

ucebnice.com 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

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

ucebnice.com SEO score

91

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

    CS

  • Encoding

    UTF-8

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

ucebnice.com

Open Graph data is detected on the main page of Ucebnice. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: