Tools & Wizards About Us

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

radioonline.cz

Rádio Online, karaoke texty, youtube písničky, texty písní, videoklipy

Page Load Speed

3 sec in total

First Response

357 ms

Resources Loaded

2.3 sec

Page Rendered

352 ms

About Website

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

Rádio Online - poslouchejte česká i zahraniční rádia online, youtube písničky, karaoke texty, texty písní, hitparáda a lyrics.

Visit radioonline.cz

Key Findings

We analyzed Radioonline.cz page load time and found that the first response time was 357 ms and then it took 2.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

radioonline.cz performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

5/100

25%

SI (Speed Index)

Value6.5 s

38/100

10%

TBT (Total Blocking Time)

Value510 ms

57/100

30%

CLS (Cumulative Layout Shift)

Value0.149

76/100

15%

TTI (Time to Interactive)

Value9.0 s

34/100

10%

Network Requests Diagram

radioonline.cz

357 ms

www.radioonline.cz

767 ms

web.4.css

244 ms

swfobject.js

6 ms

video.js

235 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that 55% of them (34 requests) were addressed to the original Radioonline.cz, 15% (9 requests) were made to Img.youtube.com and 8% (5 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (796 ms) belongs to the original domain Radioonline.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 246.3 kB (33%)

Content Size

756.9 kB

After Optimization

510.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Radioonline.cz main page is 756.9 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. 40% of websites need less resources to load. Images take 397.5 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 26.9 kB

  • Original 36.6 kB
  • After minification 33.4 kB
  • After compression 9.7 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 26.9 kB or 74% of the original size.

Image Optimization

-12%

Potential reduce by 46.3 kB

  • Original 397.5 kB
  • After minification 351.2 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. Obviously, Radio Online needs image optimization as it can save up to 46.3 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-47%

Potential reduce by 120.4 kB

  • Original 257.7 kB
  • After minification 254.6 kB
  • After compression 137.3 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 120.4 kB or 47% of the original size.

CSS Optimization

-81%

Potential reduce by 52.7 kB

  • Original 65.1 kB
  • After minification 65.1 kB
  • After compression 12.4 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. Radioonline.cz needs all CSS files to be minified and compressed as it can save up to 52.7 kB or 81% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (28%)

Requests Now

58

After Optimization

42

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Radio Online. 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 as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

radioonline.cz accessibility score

78

Accessibility Issues

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

<input type="image"> elements do not have [alt] text

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

radioonline.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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

radioonline.cz SEO score

77

Search Engine Optimization Advices

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 Radioonline.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 Radioonline.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 Radio Online. 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: