Tools & Wizards About Us
sdk-koeln.de screenshot

Report Summary

  • 11

    Performance

    Renders faster than
    24% of other websites

  • 94

    Accessibility

    Visual factors better than
    that of 84% of websites

  • 0

    Best Practices

  • 93

    SEO

    Google-friendlier than
    84% of websites

sdk-koeln.de

SDK Köln: Print on Demand, Book on Demand, Loseblattwerke

Page Load Speed

2.8 sec in total

First Response

577 ms

Resources Loaded

2 sec

Page Rendered

180 ms

sdk-koeln.de screenshot

About Website

Welcome to sdk-koeln.de homepage info - get ready to check SDK Koeln best content right away, or after learning these important things about sdk-koeln.de

Als führender Print-on-Demand-Profi ist SDK Systemdruck Köln Ihr erprobter Full-Service-Dienstleister im Digitaldruck, Informations- und Wissensmanagement.

Visit sdk-koeln.de

Key Findings

We analyzed Sdk-koeln.de page load time and found that the first response time was 577 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

sdk-koeln.de performance score

11

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value18.8 s

0/100

25%

SI (Speed Index)

Value25.3 s

0/100

10%

TBT (Total Blocking Time)

Value20,930 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.192

64/100

15%

TTI (Time to Interactive)

Value32.5 s

0/100

10%

Network Requests Diagram

sdk-koeln.de

577 ms

stylesheet_6c1cd3b6b9.css

303 ms

screen.css

306 ms

javascript_a708894199.js

309 ms

red_sdk.js

347 ms

Our browser made a total of 17 requests to load all elements on the main page. We found that 82% of them (14 requests) were addressed to the original Sdk-koeln.de, 12% (2 requests) were made to Google-analytics.com and 6% (1 request) were made to Cdn.mobilpages.de. The less responsive or slowest element that took the longest time to load (1.1 sec) belongs to the original domain Sdk-koeln.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 16.6 kB (11%)

Content Size

151.2 kB

After Optimization

134.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sdk-koeln.de main page is 151.2 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. Only 10% of websites need less resources to load. Images take 113.4 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 4.5 kB

  • Original 6.3 kB
  • After minification 4.5 kB
  • After compression 1.8 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 1.9 kB, which is 30% 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 4.5 kB or 72% of the original size.

Image Optimization

-0%

Potential reduce by 402 B

  • Original 113.4 kB
  • After minification 113.0 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. SDK Koeln images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 642 B

  • Original 18.5 kB
  • After minification 18.4 kB
  • After compression 17.8 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

-85%

Potential reduce by 11.0 kB

  • Original 13.0 kB
  • After minification 9.1 kB
  • After compression 1.9 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. Sdk-koeln.de needs all CSS files to be minified and compressed as it can save up to 11.0 kB or 85% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

16

After Optimization

16

  • Images
  • JavaScript
  • CSS

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SDK Koeln. According to our analytics all requests are already optimized.

Network Requests Diagram

sdk-koeln.de

sdk-koeln.de

577 ms

stylesheet_6c1cd3b6b9.css

stylesheet_6c1cd3b6b9.css

303 ms

screen.css

screen.css

306 ms

javascript_a708894199.js

javascript_a708894199.js

309 ms

red_sdk.js

red_sdk.js

347 ms

sdk_hg.gif

sdk_hg.gif

89 ms

facebook_02.png

facebook_02.png

92 ms

xing_02.png

xing_02.png

86 ms

youtube_01.png

youtube_01.png

170 ms

twitter.png

twitter.png

171 ms

activescript_32x32.jpg

activescript_32x32.jpg

737 ms

sdk_logo.gif

sdk_logo.gif

831 ms

leer.gif

leer.gif

175 ms

sdk_strich.gif

sdk_strich.gif

1064 ms

SDK_Home_07.jpg

SDK_Home_07.jpg

686 ms

ga.js

ga.js

9 ms

__utm.gif

__utm.gif

11 ms

Accessibility Review

sdk-koeln.de accessibility score

94

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

Links do not have a discernible name

SEO Factors

sdk-koeln.de SEO score

93

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

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 Sdk-koeln.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 Sdk-koeln.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

sdk-koeln.de

Open Graph description is not detected on the main page of SDK 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: