Report Summary

  • 55

    Performance

    Renders faster than
    72% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 75% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

seo-trefa.cz

SeoTrefa | SEO - optimalizace pro vyhledávače i pro Vás

Page Load Speed

4.1 sec in total

First Response

365 ms

Resources Loaded

3.4 sec

Page Rendered

316 ms

seo-trefa.cz screenshot

About Website

Welcome to seo-trefa.cz homepage info - get ready to check SEO Trefa best content for Czech Republic right away, or after learning these important things about seo-trefa.cz

SEO - optimalizace pro vyhledávače i pro Vás Zvyšte dlouhodobě návštěvnost svého webu díky kvalitní optimalizaci pro vyhledávače a vyšším pozicím ve

Visit seo-trefa.cz

Key Findings

We analyzed Seo-trefa.cz page load time and found that the first response time was 365 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

seo-trefa.cz performance score

55

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

36/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

35/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value190 ms

90/100

30%

CLS (Cumulative Layout Shift)

Value0.335

34/100

15%

TTI (Time to Interactive)

Value5.1 s

75/100

10%

Network Requests Diagram

seo-trefa.cz

365 ms

www.seo-trefa.cz

1218 ms

jcemediabox.css

258 ms

style.css

260 ms

modal.css

260 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that 92% of them (47 requests) were addressed to the original Seo-trefa.cz, 4% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Connect.facebook.net. The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain Seo-trefa.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 277.4 kB (51%)

Content Size

541.5 kB

After Optimization

264.1 kB

In fact, the total size of Seo-trefa.cz main page is 541.5 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. 30% of websites need less resources to load. Images take 196.8 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 48.9 kB

  • Original 61.3 kB
  • After minification 49.5 kB
  • After compression 12.5 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 11.8 kB, which is 19% 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 48.9 kB or 80% of the original size.

Image Optimization

-9%

Potential reduce by 17.9 kB

  • Original 196.8 kB
  • After minification 178.8 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. SEO Trefa images are well optimized though.

JavaScript Optimization

-64%

Potential reduce by 103.2 kB

  • Original 160.6 kB
  • After minification 153.7 kB
  • After compression 57.4 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 103.2 kB or 64% of the original size.

CSS Optimization

-87%

Potential reduce by 107.4 kB

  • Original 122.8 kB
  • After minification 75.3 kB
  • After compression 15.4 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. Seo-trefa.cz needs all CSS files to be minified and compressed as it can save up to 107.4 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (42%)

Requests Now

48

After Optimization

28

The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SEO Trefa. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

seo-trefa.cz accessibility score

90

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.

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 IDs are not unique

Best Practices

seo-trefa.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

seo-trefa.cz SEO score

86

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

High

robots.txt is not valid

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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Seo-trefa.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 Seo-trefa.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 SEO Trefa. 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: