Report Summary

  • 27

    Performance

    Renders faster than
    47% of other websites

  • 79

    Accessibility

    Visual factors better than
    that of 48% of websites

  • 62

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

jednotky.cz

Jednotky.cz - převody jednotek

Page Load Speed

2.4 sec in total

First Response

322 ms

Resources Loaded

1.8 sec

Page Rendered

227 ms

jednotky.cz screenshot

About Website

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

Snadné vzájemné převody jednotek všech veličin. Chytrý převodník jednotek.

Visit jednotky.cz

Key Findings

We analyzed Jednotky.cz page load time and found that the first response time was 322 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

jednotky.cz performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.2 s

1/100

10%

LCP (Largest Contentful Paint)

Value12.3 s

0/100

25%

SI (Speed Index)

Value9.7 s

11/100

10%

TBT (Total Blocking Time)

Value910 ms

32/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value14.1 s

10/100

10%

Network Requests Diagram

jednotky.cz

322 ms

www.jednotky.cz

319 ms

default.js

101 ms

naseptavac.js

201 ms

main.css

208 ms

Our browser made a total of 58 requests to load all elements on the main page. We found that 43% of them (25 requests) were addressed to the original Jednotky.cz, 9% (5 requests) were made to Pagead2.googlesyndication.com and 9% (5 requests) were made to Everestads.net. The less responsive or slowest element that took the longest time to load (449 ms) belongs to the original domain Jednotky.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 185.8 kB (43%)

Content Size

434.6 kB

After Optimization

248.9 kB

In fact, the total size of Jednotky.cz main page is 434.6 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. 45% of websites need less resources to load. Javascripts take 299.3 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 12.0 kB

  • Original 16.6 kB
  • After minification 15.1 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. 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 12.0 kB or 72% of the original size.

Image Optimization

-22%

Potential reduce by 23.5 kB

  • Original 108.7 kB
  • After minification 85.2 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. Obviously, Jednotky needs image optimization as it can save up to 23.5 kB or 22% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-48%

Potential reduce by 142.4 kB

  • Original 299.3 kB
  • After minification 296.0 kB
  • After compression 156.9 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 142.4 kB or 48% of the original size.

CSS Optimization

-78%

Potential reduce by 7.8 kB

  • Original 9.9 kB
  • After minification 8.5 kB
  • After compression 2.2 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. Jednotky.cz needs all CSS files to be minified and compressed as it can save up to 7.8 kB or 78% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (42%)

Requests Now

52

After Optimization

30

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jednotky. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

jednotky.cz accessibility score

79

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

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

jednotky.cz best practices score

62

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

High

Registers an unload listener

Low

Detected JavaScript libraries

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

jednotky.cz SEO score

86

Search Engine Optimization Advices

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

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

    WINDOWS-1250

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jednotky.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 Jednotky.cz main page’s claimed encoding is windows-1250. 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

Open Graph description is not detected on the main page of Jednotky. 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: