Report Summary

  • 62

    Performance

    Renders faster than
    76% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 69% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    47% of websites

  • 77

    SEO

    Google-friendlier than
    45% of websites

svist21.cz

Tvorba www stránek | Clyde

Page Load Speed

5.4 sec in total

First Response

345 ms

Resources Loaded

4.8 sec

Page Rendered

303 ms

svist21.cz screenshot

About Website

Visit svist21.cz now to see the best up-to-date Svist 21 content and also check out these interesting facts you probably never knew about svist21.cz

Váš web na 1. místě. Tvorba www stránek na míru, optimalizace SEO a zvýšení efektivity prodeje přes internet.

Visit svist21.cz

Key Findings

We analyzed Svist21.cz page load time and found that the first response time was 345 ms and then it took 5.1 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

svist21.cz performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

34/100

10%

LCP (Largest Contentful Paint)

Value5.6 s

17/100

25%

SI (Speed Index)

Value6.8 s

35/100

10%

TBT (Total Blocking Time)

Value180 ms

92/100

30%

CLS (Cumulative Layout Shift)

Value0.017

100/100

15%

TTI (Time to Interactive)

Value4.7 s

80/100

10%

Network Requests Diagram

svist21.cz

345 ms

www.clyde.cz

1819 ms

screen-clyde.css

124 ms

loader.js

719 ms

classes.css

129 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original Svist21.cz, 63% (17 requests) were made to Clyde.cz and 26% (7 requests) were made to Data.svist21.cz. The less responsive or slowest element that took the longest time to load (1.8 sec) relates to the external source Data.svist21.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 47.0 kB (13%)

Content Size

365.7 kB

After Optimization

318.7 kB

In fact, the total size of Svist21.cz main page is 365.7 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. Images take 301.4 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 13.1 kB

  • Original 17.5 kB
  • After minification 16.1 kB
  • After compression 4.4 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 13.1 kB or 75% of the original size.

Image Optimization

-3%

Potential reduce by 10.2 kB

  • Original 301.4 kB
  • After minification 291.2 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. Svist 21 images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 34 B

  • Original 17.2 kB
  • After minification 17.2 kB
  • After compression 17.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-80%

Potential reduce by 23.6 kB

  • Original 29.6 kB
  • After minification 20.8 kB
  • After compression 5.9 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. Svist21.cz needs all CSS files to be minified and compressed as it can save up to 23.6 kB or 80% of the original size.

Requests Breakdown

Number of requests can be reduced by 7 (28%)

Requests Now

25

After Optimization

18

The browser has sent 25 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Svist 21. 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 CSS and as a result speed up the page load time.

Accessibility Review

svist21.cz accessibility score

86

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.

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

svist21.cz best practices score

75

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

svist21.cz SEO score

77

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Svist21.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Svist21.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 Svist 21. 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: