Report Summary

  • 61

    Performance

    Renders faster than
    76% of other websites

  • 81

    Accessibility

    Visual factors better than
    that of 51% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

sto.cz

CZ

Page Load Speed

3 sec in total

First Response

327 ms

Resources Loaded

2.6 sec

Page Rendered

58 ms

sto.cz screenshot

About Website

Click here to check amazing Sto content for Slovakia. Otherwise, check out these important facts you probably never knew about sto.cz

Visit sto.cz

Key Findings

We analyzed Sto.cz page load time and found that the first response time was 327 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

sto.cz performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value6.3 s

10/100

25%

SI (Speed Index)

Value5.6 s

52/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value6.1 s

64/100

10%

Network Requests Diagram

sto.cz

327 ms

619 ms

loader.js

30 ms

fonts.css

496 ms

inline.js

374 ms

Our browser made a total of 15 requests to load all elements on the main page. We found that 60% of them (9 requests) were addressed to the original Sto.cz, 20% (3 requests) were made to App.usercentrics.eu and 20% (3 requests) were made to Api.usercentrics.eu. The less responsive or slowest element that took the longest time to load (980 ms) belongs to the original domain Sto.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 90.6 kB (24%)

Content Size

376.2 kB

After Optimization

285.7 kB

In fact, the total size of Sto.cz main page is 376.2 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. 15% of websites need less resources to load. Javascripts take 262.7 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 90.5 kB

  • Original 113.0 kB
  • After minification 113.0 kB
  • After compression 22.4 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 90.5 kB or 80% of the original size.

Image Optimization

-7%

Potential reduce by 35 B

  • Original 522 B
  • After minification 487 B

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. Sto images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 262.7 kB
  • After minification 262.7 kB
  • After compression 262.7 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 6 (46%)

Requests Now

13

After Optimization

7

The browser has sent 13 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sto. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

sto.cz accessibility score

81

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

ARIA IDs are not unique

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.

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

sto.cz best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

sto.cz SEO score

93

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 uses legible font sizes

Language and Encoding

  • Language Detected

    N/A

  • Language Claimed

    CS

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sto.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 Sto.cz main page’s claimed encoding is . 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 Sto. 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: