Report Summary

  • 8

    Performance

    Renders faster than
    22% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 67% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    56% of websites

radiokoeln.de

Eure Nr. 1 - Radio Köln

Page Load Speed

4.6 sec in total

First Response

587 ms

Resources Loaded

3.4 sec

Page Rendered

597 ms

radiokoeln.de screenshot

About Website

Click here to check amazing Radio Koeln content for Germany. Otherwise, check out these important facts you probably never knew about radiokoeln.de

Seit 1991 sind wir Euer Lokalradio in Köln. Auf der 107.1 MHz, unserer Radio Köln - App und im Webradio informieren wir Euch über das Wichtigste aus Köln und der Welt. Rund um die Uhr gibt es dazu den...

Visit radiokoeln.de

Key Findings

We analyzed Radiokoeln.de page load time and found that the first response time was 587 ms and then it took 4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

radiokoeln.de performance score

8

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

37/100

10%

LCP (Largest Contentful Paint)

Value26.7 s

0/100

25%

SI (Speed Index)

Value18.1 s

0/100

10%

TBT (Total Blocking Time)

Value2,440 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0.503

16/100

15%

TTI (Time to Interactive)

Value23.7 s

1/100

10%

Network Requests Diagram

radiokoeln.de

587 ms

radios_1412121550.css

482 ms

css3.css

200 ms

jquery.fancybox.css

197 ms

kalender.css

201 ms

Our browser made a total of 220 requests to load all elements on the main page. We found that 61% of them (134 requests) were addressed to the original Radiokoeln.de, 10% (23 requests) were made to Cdn.flashtalking.com and 7% (16 requests) were made to 0. The less responsive or slowest element that took the longest time to load (698 ms) belongs to the original domain Radiokoeln.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 822.6 kB (46%)

Content Size

1.8 MB

After Optimization

958.8 kB

In fact, the total size of Radiokoeln.de main page is 1.8 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. 60% of websites need less resources to load. Javascripts take 824.5 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 123.9 kB

  • Original 163.8 kB
  • After minification 156.8 kB
  • After compression 39.9 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 123.9 kB or 76% of the original size.

Image Optimization

-5%

Potential reduce by 33.4 kB

  • Original 668.9 kB
  • After minification 635.5 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. Radio Koeln images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 556.0 kB

  • Original 824.5 kB
  • After minification 783.2 kB
  • After compression 268.5 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 556.0 kB or 67% of the original size.

CSS Optimization

-88%

Potential reduce by 109.2 kB

  • Original 124.1 kB
  • After minification 99.3 kB
  • After compression 14.9 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. Radiokoeln.de needs all CSS files to be minified and compressed as it can save up to 109.2 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 106 (53%)

Requests Now

200

After Optimization

94

The browser has sent 200 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Radio Koeln. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 35 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

radiokoeln.de 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.

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

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

radiokoeln.de 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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

radiokoeln.de SEO score

85

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

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

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

    DE

  • Language Claimed

    DE

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Radiokoeln.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it matches the claimed language. Our system also found out that Radiokoeln.de main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

Open Graph description is not detected on the main page of Radio Koeln. 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: