Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 48

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 69

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

b2bdata.cz

Databáze firem, databáze IČO, Databáze firem živnostníků - B2Bdata

Page Load Speed

29.2 sec in total

First Response

12 sec

Resources Loaded

16.9 sec

Page Rendered

275 ms

b2bdata.cz screenshot

About Website

Click here to check amazing B2Bdata content. Otherwise, check out these important facts you probably never knew about b2bdata.cz

Kvalitní databáze firem a živnostníků v ČR. Sledujeme 37 údajů každé firmy.Garantujeme stáří dat v řádu dnů a kvalitu.Najdeme Vám nové zákazníky.

Visit b2bdata.cz

Key Findings

We analyzed B2bdata.cz page load time and found that the first response time was 12 sec and then it took 17.2 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.

Performance Metrics

b2bdata.cz performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.8 s

57/100

10%

LCP (Largest Contentful Paint)

Value11.6 s

0/100

25%

SI (Speed Index)

Value6.9 s

34/100

10%

TBT (Total Blocking Time)

Value1,200 ms

21/100

30%

CLS (Cumulative Layout Shift)

Value0.11

88/100

15%

TTI (Time to Interactive)

Value11.7 s

18/100

10%

Network Requests Diagram

b2bdata.cz

12019 ms

mootools.js

229 ms

caption.js

223 ms

styl.css

225 ms

template.css

223 ms

Our browser made a total of 56 requests to load all elements on the main page. We found that 70% of them (39 requests) were addressed to the original B2bdata.cz, 5% (3 requests) were made to S.ytimg.com and 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (12 sec) belongs to the original domain B2bdata.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 452.3 kB (46%)

Content Size

977.4 kB

After Optimization

525.1 kB

In fact, the total size of B2bdata.cz main page is 977.4 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. 35% of websites need less resources to load. Images take 368.6 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 15.7 kB

  • Original 21.4 kB
  • After minification 17.9 kB
  • After compression 5.7 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 3.4 kB, which is 16% 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 15.7 kB or 73% of the original size.

Image Optimization

-3%

Potential reduce by 11.4 kB

  • Original 368.6 kB
  • After minification 357.2 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. B2Bdata images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 200.5 kB

  • Original 316.6 kB
  • After minification 313.3 kB
  • After compression 116.1 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 200.5 kB or 63% of the original size.

CSS Optimization

-83%

Potential reduce by 224.7 kB

  • Original 270.9 kB
  • After minification 263.2 kB
  • After compression 46.2 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. B2bdata.cz needs all CSS files to be minified and compressed as it can save up to 224.7 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (49%)

Requests Now

51

After Optimization

26

The browser has sent 51 CSS, Javascripts, AJAX and image requests in order to completely render the main page of B2Bdata. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

b2bdata.cz accessibility score

48

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

<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

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

Best Practices

b2bdata.cz best practices score

69

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

b2bdata.cz SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

robots.txt is not valid

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise B2bdata.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that B2bdata.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 B2Bdata. 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: