Tools & Wizards About Us
tzb-info.cz screenshot

Report Summary

  • 16

    Performance

    Renders faster than
    30% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

tzb-info.cz

TZB-info - Stavebnictví. Úspory energií. Technická zařízení budov.

Page Load Speed

24.7 sec in total

First Response

302 ms

Resources Loaded

22.9 sec

Page Rendered

1.5 sec

tzb-info.cz screenshot

About Website

Click here to check amazing TZB Info content for Czech Republic. Otherwise, check out these important facts you probably never knew about tzb-info.cz

Odborný web pro stavebnictví, technická zařízení budov a úspory energií. To nejlepší o stavbě a vytápění, větrání, klimatizaci, vodě a kanalizaci, obnovitelné energii a facility managementu. Oborová d...

Visit tzb-info.cz

Key Findings

We analyzed Tzb-info.cz page load time and found that the first response time was 302 ms and then it took 24.4 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

tzb-info.cz performance score

16

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.3 s

1/100

10%

LCP (Largest Contentful Paint)

Value7.6 s

4/100

25%

SI (Speed Index)

Value44.2 s

0/100

10%

TBT (Total Blocking Time)

Value1,470 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0.186

66/100

15%

TTI (Time to Interactive)

Value15.1 s

7/100

10%

Network Requests Diagram

tzb-info.cz

302 ms

tzb-info.cz

388 ms

www.tzb-info.cz

815 ms

css

31 ms

css

48 ms

Our browser made a total of 177 requests to load all elements on the main page. We found that 57% of them (101 requests) were addressed to the original Tzb-info.cz, 10% (18 requests) were made to Tpc.googlesyndication.com and 10% (17 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (20.5 sec) relates to the external source Toplist.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 329.4 kB (15%)

Content Size

2.1 MB

After Optimization

1.8 MB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Tzb-info.cz main page is 2.1 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 120.9 kB

  • Original 145.5 kB
  • After minification 141.2 kB
  • After compression 24.6 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 120.9 kB or 83% of the original size.

Image Optimization

-12%

Potential reduce by 201.1 kB

  • Original 1.7 MB
  • After minification 1.5 MB

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, TZB Info needs image optimization as it can save up to 201.1 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-3%

Potential reduce by 7.5 kB

  • Original 259.0 kB
  • After minification 258.9 kB
  • After compression 251.5 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. This website has mostly compressed JavaScripts.

Requests Breakdown

Number of requests can be reduced by 58 (36%)

Requests Now

160

After Optimization

102

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 160 CSS, Javascripts, AJAX and image requests in order to completely render the main page of TZB Info. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 24 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

tzb-info.cz

tzb-info.cz

302 ms

tzb-info.cz

tzb-info.cz

388 ms

www.tzb-info.cz

www.tzb-info.cz

815 ms

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Accessibility Review

tzb-info.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

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

tzb-info.cz best practices score

67

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

tzb-info.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 doesn't use legible font sizes

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    CS

  • Encoding

    ISO-8859-2

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Tzb-info.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 Tzb-info.cz main page’s claimed encoding is iso-8859-2. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

tzb-info.cz

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