Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 74

    SEO

    Google-friendlier than
    32% of websites

cesky-jazyk.cz

Český-jazyk.cz aneb studentský underground

Page Load Speed

6.7 sec in total

First Response

357 ms

Resources Loaded

4.1 sec

Page Rendered

2.3 sec

cesky-jazyk.cz screenshot

About Website

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

Na stránkách ČESKÝ JAZYK Literatura naleznete obsáhlý čtenářský deník, několik úryvků z knížek - tzv. čítanka, u některých spisovatelů stručný životopis a v neposlední řadě databázi slohových prací...

Visit cesky-jazyk.cz

Key Findings

We analyzed Cesky-jazyk.cz page load time and found that the first response time was 357 ms and then it took 6.4 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

cesky-jazyk.cz performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value10.9 s

0/100

25%

SI (Speed Index)

Value8.9 s

15/100

10%

TBT (Total Blocking Time)

Value2,280 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.069

96/100

15%

TTI (Time to Interactive)

Value22.3 s

1/100

10%

Network Requests Diagram

cesky-jazyk.cz

357 ms

314 ms

style.css.php

337 ms

style-bbt.php

233 ms

mootools-1.2.3-core.js

358 ms

Our browser made a total of 101 requests to load all elements on the main page. We found that 53% of them (54 requests) were addressed to the original Cesky-jazyk.cz, 5% (5 requests) were made to Pagead2.googlesyndication.com and 5% (5 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Cesky-jazyk.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 171.9 kB (18%)

Content Size

948.3 kB

After Optimization

776.3 kB

In fact, the total size of Cesky-jazyk.cz main page is 948.3 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. 65% of websites need less resources to load. Images take 523.9 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 46.9 kB

  • Original 59.2 kB
  • After minification 49.1 kB
  • After compression 12.2 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 10.0 kB, which is 17% 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 46.9 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 3.7 kB

  • Original 523.9 kB
  • After minification 520.2 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. Cesky Jazyk images are well optimized though.

JavaScript Optimization

-32%

Potential reduce by 115.4 kB

  • Original 357.2 kB
  • After minification 355.3 kB
  • After compression 241.7 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 115.4 kB or 32% of the original size.

CSS Optimization

-74%

Potential reduce by 5.9 kB

  • Original 8.0 kB
  • After minification 6.2 kB
  • After compression 2.1 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. Cesky-jazyk.cz needs all CSS files to be minified and compressed as it can save up to 5.9 kB or 74% of the original size.

Requests Breakdown

Number of requests can be reduced by 60 (65%)

Requests Now

93

After Optimization

33

The browser has sent 93 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cesky Jazyk. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 32 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

cesky-jazyk.cz accessibility score

84

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

cesky-jazyk.cz 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

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

cesky-jazyk.cz SEO score

74

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

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 doesn't use 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 Cesky-jazyk.cz 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 Cesky-jazyk.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 Cesky Jazyk. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: