Tools & Wizards About Us

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

cdi.cz

CDI.CZ – vývoj software na zakázku, tvorba webových stránek

Page Load Speed

3.3 sec in total

First Response

328 ms

Resources Loaded

2.8 sec

Page Rendered

106 ms

About Website

Welcome to cdi.cz homepage info - get ready to check CDI best content for Russia right away, or after learning these important things about cdi.cz

CDI.CZ, s.r.o. se zabývá tvorbou software na zakázku a webových stránek. Dále nabízí servis hardware a pro své klienty nabízí kvalitní hosting.

Visit cdi.cz

Key Findings

We analyzed Cdi.cz page load time and found that the first response time was 328 ms and then it took 2.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

cdi.cz performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.6 s

0/100

10%

LCP (Largest Contentful Paint)

Value11.2 s

0/100

25%

SI (Speed Index)

Value12.3 s

3/100

10%

TBT (Total Blocking Time)

Value330 ms

75/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value13.1 s

12/100

10%

Network Requests Diagram

cdi.cz

328 ms

www.cdi.cz

671 ms

uc.js

42 ms

global.css

98 ms

font-awesome.min.css

32 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that 84% of them (58 requests) were addressed to the original Cdi.cz, 7% (5 requests) were made to Googletagmanager.com and 3% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (671 ms) belongs to the original domain Cdi.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 304.1 kB (31%)

Content Size

988.6 kB

After Optimization

684.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Cdi.cz main page is 988.6 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. 50% of websites need less resources to load. Images take 583.5 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 13.5 kB

  • Original 17.6 kB
  • After minification 17.0 kB
  • After compression 4.1 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 13.5 kB or 77% of the original size.

Image Optimization

-33%

Potential reduce by 190.1 kB

  • Original 583.5 kB
  • After minification 393.4 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. Obviously, CDI needs image optimization as it can save up to 190.1 kB or 33% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-26%

Potential reduce by 99.4 kB

  • Original 380.7 kB
  • After minification 380.4 kB
  • After compression 281.3 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 99.4 kB or 26% of the original size.

CSS Optimization

-16%

Potential reduce by 1.1 kB

  • Original 6.8 kB
  • After minification 6.8 kB
  • After compression 5.7 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. Cdi.cz needs all CSS files to be minified and compressed as it can save up to 1.1 kB or 16% of the original size.

Requests Breakdown

Number of requests can be reduced by 50 (75%)

Requests Now

67

After Optimization

17

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CDI. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 51 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

cdi.cz accessibility score

89

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.

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

Links do not have a discernible name

Best Practices

cdi.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

SEO Factors

cdi.cz SEO score

92

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

    CS

  • Language Claimed

    CS

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cdi.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 Cdi.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 description is not detected on the main page of CDI. 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: