Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 97

    Accessibility

    Visual factors better than
    that of 92% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

postsignum.cz

Certifikační autorita, kvalifikovaný certifikát, kvalifikované časové razítko, Bezpečný klíč, USB token | Certifikační autorita PostSignum

Page Load Speed

2.6 sec in total

First Response

302 ms

Resources Loaded

2.2 sec

Page Rendered

138 ms

postsignum.cz screenshot

About Website

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

Certifikační autorita PostSignum

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Key Findings

We analyzed Postsignum.cz page load time and found that the first response time was 302 ms and then it took 2.3 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

postsignum.cz performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value12.3 s

0/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value1,990 ms

8/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value9.4 s

31/100

10%

Network Requests Diagram

postsignum.cz

302 ms

713 ms

ceskaposta_screen.css

627 ms

postsignum_logo.jpg

417 ms

bod.gif

205 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that all of those requests were addressed to Postsignum.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (713 ms) belongs to the original domain Postsignum.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 246.9 kB (56%)

Content Size

443.6 kB

After Optimization

196.7 kB

In fact, the total size of Postsignum.cz main page is 443.6 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. 20% of websites need less resources to load. Javascripts take 229.6 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 19.3 kB

  • Original 23.9 kB
  • After minification 16.1 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. This page needs HTML code to be minified as it can gain 7.8 kB, which is 33% 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 19.3 kB or 81% of the original size.

Image Optimization

-11%

Potential reduce by 14.2 kB

  • Original 129.5 kB
  • After minification 115.3 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, Post Signum needs image optimization as it can save up to 14.2 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-71%

Potential reduce by 163.2 kB

  • Original 229.6 kB
  • After minification 205.7 kB
  • After compression 66.4 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 163.2 kB or 71% of the original size.

CSS Optimization

-83%

Potential reduce by 50.2 kB

  • Original 60.7 kB
  • After minification 46.1 kB
  • After compression 10.5 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. Postsignum.cz needs all CSS files to be minified and compressed as it can save up to 50.2 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (48%)

Requests Now

42

After Optimization

22

The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Post Signum. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

postsignum.cz accessibility score

97

Accessibility Issues

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

postsignum.cz best practices score

67

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

SEO Factors

postsignum.cz SEO score

69

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

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    CS

  • Encoding

    ISO-8859-2

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Postsignum.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 Postsignum.cz main page’s claimed encoding is iso-8859-2. 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 Post Signum. 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: