Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 61

    Accessibility

    Visual factors better than
    that of 27% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

kn.vutbr.cz

KolejNet

Page Load Speed

2.6 sec in total

First Response

371 ms

Resources Loaded

2.1 sec

Page Rendered

155 ms

kn.vutbr.cz screenshot

About Website

Welcome to kn.vutbr.cz homepage info - get ready to check Kn Vutbr best content for Czech Republic right away, or after learning these important things about kn.vutbr.cz

Visit kn.vutbr.cz

Key Findings

We analyzed Kn.vutbr.cz page load time and found that the first response time was 371 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 35% of websites can load faster.

Performance Metrics

kn.vutbr.cz performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.4 s

100/100

25%

SI (Speed Index)

Value1.5 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value0.8 s

100/100

10%

Network Requests Diagram

kn.vutbr.cz

371 ms

www.kn.vutbr.cz

1007 ms

text.css

363 ms

Nop_bl.gif

376 ms

title.jpg

492 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that all of those requests were addressed to Kn.vutbr.cz and no external sources were called. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Kn.vutbr.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 10.4 kB (31%)

Content Size

34.0 kB

After Optimization

23.6 kB

In fact, the total size of Kn.vutbr.cz main page is 34.0 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 21.6 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 9.8 kB

  • Original 11.4 kB
  • After minification 6.0 kB
  • After compression 1.7 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 5.4 kB, which is 47% 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 9.8 kB or 85% of the original size.

Image Optimization

-0%

Potential reduce by 64 B

  • Original 21.6 kB
  • After minification 21.5 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. Kn Vutbr images are well optimized though.

CSS Optimization

-60%

Potential reduce by 569 B

  • Original 950 B
  • After minification 702 B
  • After compression 381 B

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. Kn.vutbr.cz needs all CSS files to be minified and compressed as it can save up to 569 B or 60% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

6

After Optimization

6

The browser has sent 6 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Kn Vutbr. According to our analytics all requests are already optimized.

Accessibility Review

kn.vutbr.cz accessibility score

61

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

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

Image elements do not have [alt] attributes

Best Practices

kn.vutbr.cz best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

SEO Factors

kn.vutbr.cz SEO score

54

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Page is blocked from indexing

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

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 Kn.vutbr.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 Kn.vutbr.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 Kn Vutbr. 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: