Tools & Wizards About Us
radiokoeln.de screenshot

Report Summary

  • 7

    Performance

    Renders faster than
    22% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 66% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

radiokoeln.de

Eure Nr. 1 - Radio Köln

Page Load Speed

8.1 sec in total

First Response

100 ms

Resources Loaded

6.1 sec

Page Rendered

1.8 sec

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 100 ms and then it took 8 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

radiokoeln.de performance score

7

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

31/100

10%

LCP (Largest Contentful Paint)

Value25.3 s

0/100

25%

SI (Speed Index)

Value16.9 s

0/100

10%

TBT (Total Blocking Time)

Value4,230 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.444

21/100

15%

TTI (Time to Interactive)

Value32.5 s

0/100

10%

Network Requests Diagram

radiokoeln.de

100 ms

www.radiokoeln.de

132 ms

gtm.js

786 ms

radiokoeln.css

10 ms

jquery.min.js

67 ms

Our browser made a total of 99 requests to load all elements on the main page. We found that 75% of them (74 requests) were addressed to the original Radiokoeln.de, 6% (6 requests) were made to Youtube.com and 5% (5 requests) were made to Api-prod.nrwlokalradios.com. The less responsive or slowest element that took the longest time to load (5.4 sec) belongs to the original domain Radiokoeln.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 570.5 kB (11%)

Content Size

5.2 MB

After Optimization

4.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Radiokoeln.de main page is 5.2 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. Only a small number of websites need less resources to load. Images take 4.1 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 94.0 kB

  • Original 117.6 kB
  • After minification 114.7 kB
  • After compression 23.7 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 94.0 kB or 80% of the original size.

Image Optimization

-11%

Potential reduce by 470.8 kB

  • Original 4.1 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, Radio Koeln needs image optimization as it can save up to 470.8 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-1%

Potential reduce by 5.7 kB

  • Original 863.3 kB
  • After minification 863.3 kB
  • After compression 857.5 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 0 B

  • Original 128.3 kB
  • After minification 128.3 kB
  • After compression 128.3 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 has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 14 (16%)

Requests Now

89

After Optimization

75

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 89 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 15 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

radiokoeln.de

radiokoeln.de

100 ms

www.radiokoeln.de

www.radiokoeln.de

132 ms

gtm.js

gtm.js

786 ms

radiokoeln.css

radiokoeln.css

10 ms

jquery.min.js

jquery.min.js

67 ms

radionrw.min.js

radionrw.min.js

80 ms

elements.js

elements.js

237 ms

embed.js

embed.js

220 ms

shariff.min.js

shariff.min.js

222 ms

W4ZwnTMEmi0

W4ZwnTMEmi0

864 ms

radio_koeln.png

radio_koeln.png

174 ms

claim_koeln.svg

claim_koeln.svg

176 ms

hsg-icon-facebook-color.png

hsg-icon-facebook-color.png

585 ms

hsg-icon-twitter-color.png

hsg-icon-twitter-color.png

183 ms

hsg-icon-instagram-color.png

hsg-icon-instagram-color.png

183 ms

hsg-icon-youtube-color.png

hsg-icon-youtube-color.png

718 ms

hsg-icon-whatsapp-color.png

hsg-icon-whatsapp-color.png

719 ms

slick-placeholder.png

slick-placeholder.png

717 ms

719 ms

721 ms

718 ms

722 ms

723 ms

724 ms

724 ms

725 ms

728 ms

727 ms

729 ms

728 ms

784 ms

729 ms

729 ms

783 ms

782 ms

1781 ms

2355 ms

918 ms

2176 ms

915 ms

913 ms

903 ms

futura-medium.woff

futura-medium.woff

1245 ms

Roboto-Bold.woff

Roboto-Bold.woff

1293 ms

Roboto-Regular.woff

Roboto-Regular.woff

1292 ms

futura-bold.woff

futura-bold.woff

1647 ms

materialdesignicons-webfont.woff

materialdesignicons-webfont.woff

1858 ms

5438 ms

details

details

1098 ms

overview

overview

871 ms

current

current

918 ms

channels

channels

838 ms

2448 ms

1272 ms

current

current

754 ms

1140 ms

1141 ms

1140 ms

1141 ms

1140 ms

1139 ms

1138 ms

1138 ms

1139 ms

1139 ms

1138 ms

1139 ms

1141 ms

1143 ms

1151 ms

1744 ms

1325 ms

1299 ms

1273 ms

footer-koeln.png

footer-koeln.png

1274 ms

www-player.css

www-player.css

91 ms

www-embed-player.js

www-embed-player.js

140 ms

base.js

base.js

218 ms

bundle.js

bundle.js

175 ms

iam.js

iam.js

849 ms

lightworks-radio.js

lightworks-radio.js

476 ms

2432 ms

gtm.js

gtm.js

326 ms

ad_status.js

ad_status.js

302 ms

vTEfc-jlr9e_tfMt-BR8Zcc1_6XGLRk25TFtjqWuknE.js

vTEfc-jlr9e_tfMt-BR8Zcc1_6XGLRk25TFtjqWuknE.js

331 ms

embed.js

embed.js

186 ms

pencil.svg

pencil.svg

841 ms

100x100bb.jpg

100x100bb.jpg

228 ms

trafficjam.svg

trafficjam.svg

809 ms

speedcam.svg

speedcam.svg

814 ms

793 ms

164 ms

KFOmCnqEu92Fr1Mu4mxP.ttf

KFOmCnqEu92Fr1Mu4mxP.ttf

225 ms

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

226 ms

id

id

98 ms

Create

Create

101 ms

iconvault_forecastfont.woff

iconvault_forecastfont.woff

630 ms

GenerateIT

GenerateIT

13 ms

log_event

log_event

25 ms

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

radiokoeln.de 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

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

    UTF-8

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 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

radiokoeln.de

Open Graph data is detected on the main page of Radio Koeln. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: