Report Summary

  • 62

    Performance

    Renders faster than
    77% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

online-kola.cz

Horská kola, dětská kola, cyklo doplňky, výprodej kol

Page Load Speed

6 sec in total

First Response

1.1 sec

Resources Loaded

4.8 sec

Page Rendered

156 ms

online-kola.cz screenshot

About Website

Welcome to online-kola.cz homepage info - get ready to check Online Kola best content for Czech Republic right away, or after learning these important things about online-kola.cz

Internetový obchod Online-kola.cz nabízí horská kola, dětská kola, akční výprodej kol, cyklistické přilby a cyklo doplňky.

Visit online-kola.cz

Key Findings

We analyzed Online-kola.cz page load time and found that the first response time was 1.1 sec and then it took 5 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

online-kola.cz performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.8 s

12/100

10%

LCP (Largest Contentful Paint)

Value4.8 s

31/100

25%

SI (Speed Index)

Value7.4 s

27/100

10%

TBT (Total Blocking Time)

Value40 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.089

92/100

15%

TTI (Time to Interactive)

Value5.7 s

68/100

10%

Network Requests Diagram

online-kola.cz

1065 ms

www.online-kola.cz

1820 ms

www.online-kola.cz

596 ms

screen.css

121 ms

prettyPhoto.css

227 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 93% of them (38 requests) were addressed to the original Online-kola.cz, 5% (2 requests) were made to Ssl.google-analytics.com and 2% (1 request) were made to Ssl.heureka.cz. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Online-kola.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 15.2 kB (3%)

Content Size

437.0 kB

After Optimization

421.8 kB

In fact, the total size of Online-kola.cz main page is 437.0 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. 20% of websites need less resources to load. Images take 286.1 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 8.8 kB

  • Original 12.7 kB
  • After minification 12.0 kB
  • After compression 4.0 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 8.8 kB or 69% of the original size.

Image Optimization

-2%

Potential reduce by 5.2 kB

  • Original 286.1 kB
  • After minification 281.0 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. Online Kola images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 639 B

  • Original 130.6 kB
  • After minification 130.6 kB
  • After compression 130.0 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.

CSS Optimization

-9%

Potential reduce by 663 B

  • Original 7.5 kB
  • After minification 7.5 kB
  • After compression 6.8 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. Online-kola.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 20 (56%)

Requests Now

36

After Optimization

16

The browser has sent 36 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Online Kola. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

online-kola.cz accessibility score

65

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

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

Best Practices

online-kola.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

SEO Factors

online-kola.cz SEO score

77

Search Engine Optimization Advices

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 Online-kola.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 Online-kola.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 Online Kola. 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: