Report Summary

  • 3

    Performance

    Renders faster than
    20% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

casradio.cz

Radio Čas | HRAJEME NEJVĚTŠÍ HITY

Page Load Speed

23.4 sec in total

First Response

549 ms

Resources Loaded

22.5 sec

Page Rendered

311 ms

casradio.cz screenshot

About Website

Welcome to casradio.cz homepage info - get ready to check Cas Radio best content for Czech Republic right away, or after learning these important things about casradio.cz

Radio Čas: HRAJEME NEJVĚTŠÍ HITY

Visit casradio.cz

Key Findings

We analyzed Casradio.cz page load time and found that the first response time was 549 ms and then it took 22.8 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

casradio.cz performance score

3

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value14.5 s

0/100

25%

SI (Speed Index)

Value16.9 s

0/100

10%

TBT (Total Blocking Time)

Value2,100 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value2.509

0/100

15%

TTI (Time to Interactive)

Value27.2 s

0/100

10%

Network Requests Diagram

casradio.cz

549 ms

wp-emoji-release.min.js

179 ms

css

38 ms

style.css

291 ms

style-extensions.css

287 ms

Our browser made a total of 150 requests to load all elements on the main page. We found that 72% of them (108 requests) were addressed to the original Casradio.cz, 9% (13 requests) were made to Static.xx.fbcdn.net and 3% (5 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (19.4 sec) belongs to the original domain Casradio.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 929.5 kB (19%)

Content Size

4.9 MB

After Optimization

4.0 MB

In fact, the total size of Casradio.cz main page is 4.9 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 4.3 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 97.1 kB

  • Original 117.8 kB
  • After minification 113.9 kB
  • After compression 20.7 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. 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 97.1 kB or 82% of the original size.

Image Optimization

-17%

Potential reduce by 725.3 kB

  • Original 4.3 MB
  • After minification 3.6 MB

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, Cas Radio needs image optimization as it can save up to 725.3 kB or 17% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-23%

Potential reduce by 102.0 kB

  • Original 444.3 kB
  • After minification 444.1 kB
  • After compression 342.3 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 102.0 kB or 23% of the original size.

CSS Optimization

-7%

Potential reduce by 5.1 kB

  • Original 72.7 kB
  • After minification 72.7 kB
  • After compression 67.6 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. Casradio.cz has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 62 (44%)

Requests Now

140

After Optimization

78

The browser has sent 140 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cas Radio. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 46 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

casradio.cz accessibility score

87

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

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

casradio.cz best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

casradio.cz SEO score

90

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

High

Tap targets are not sized appropriately

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 Casradio.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 Casradio.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 Cas Radio. 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: