Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 69% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

kolik.cz

Kolik.cz - Spočítejte si, kolik ušetříte při výměně deviz!

Page Load Speed

2 sec in total

First Response

347 ms

Resources Loaded

1.5 sec

Page Rendered

178 ms

kolik.cz screenshot

About Website

Visit kolik.cz now to see the best up-to-date Kolik content for Czech Republic and also check out these interesting facts you probably never knew about kolik.cz

Kolik.cz - Spočítejte si, kolik ušetříte! On-line srovnání aktuálních valutových i devizových kurzů bank a směnáren na českém trhu.

Visit kolik.cz

Key Findings

We analyzed Kolik.cz page load time and found that the first response time was 347 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

kolik.cz performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

74/100

10%

LCP (Largest Contentful Paint)

Value4.7 s

33/100

25%

SI (Speed Index)

Value3.4 s

89/100

10%

TBT (Total Blocking Time)

Value390 ms

68/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.9 s

96/100

10%

Network Requests Diagram

kolik.cz

347 ms

kolik.css

203 ms

iphone-app.css

200 ms

menu.js

205 ms

dyncont.js

207 ms

Our browser made a total of 29 requests to load all elements on the main page. We found that 93% of them (27 requests) were addressed to the original Kolik.cz, 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (891 ms) belongs to the original domain Kolik.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 54.8 kB (32%)

Content Size

168.8 kB

After Optimization

114.0 kB

In fact, the total size of Kolik.cz main page is 168.8 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. Only 10% of websites need less resources to load. Images take 104.2 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 14.4 kB

  • Original 19.0 kB
  • After minification 16.6 kB
  • After compression 4.6 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. This page needs HTML code to be minified as it can gain 2.4 kB, which is 13% 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 14.4 kB or 76% of the original size.

Image Optimization

-18%

Potential reduce by 18.7 kB

  • Original 104.2 kB
  • After minification 85.6 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, Kolik needs image optimization as it can save up to 18.7 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-38%

Potential reduce by 12.7 kB

  • Original 33.8 kB
  • After minification 31.1 kB
  • After compression 21.1 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 12.7 kB or 38% of the original size.

CSS Optimization

-77%

Potential reduce by 9.1 kB

  • Original 11.7 kB
  • After minification 9.6 kB
  • After compression 2.7 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. Kolik.cz needs all CSS files to be minified and compressed as it can save up to 9.1 kB or 77% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (36%)

Requests Now

28

After Optimization

18

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kolik. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

kolik.cz accessibility score

88

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

kolik.cz best practices score

75

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

SEO Factors

kolik.cz SEO score

75

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 Kolik.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 Kolik.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 Kolik. 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: