Tools & Wizards About Us

Report Summary

  • 72

    Performance

    Renders faster than
    82% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 75% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

uni-koeln.de

UNIVERSITÄT ZU KÖLN

Page Load Speed

3.9 sec in total

First Response

789 ms

Resources Loaded

2.9 sec

Page Rendered

278 ms

About Website

Click here to check amazing Uni Koeln content for Germany. Otherwise, check out these important facts you probably never knew about uni-koeln.de

Die Universität zu Köln ist eine Hochschule mit dem klassischen Fächerspektrum einer Volluniversität. Als eine der größten Hochschulen Europas arbeitet sie in Forschung und Lehre auch international au...

Visit uni-koeln.de

Key Findings

We analyzed Uni-koeln.de page load time and found that the first response time was 789 ms and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

uni-koeln.de performance score

72

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

69/100

10%

LCP (Largest Contentful Paint)

Value5.7 s

16/100

25%

SI (Speed Index)

Value4.1 s

80/100

10%

TBT (Total Blocking Time)

Value60 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.047

99/100

15%

TTI (Time to Interactive)

Value4.0 s

87/100

10%

Network Requests Diagram

www.uni-koeln.de

789 ms

style.out.css

335 ms

aenderung.css

327 ms

takomat-slider.css

328 ms

modernizr.min.js

359 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 96% of them (26 requests) were addressed to the original Uni-koeln.de, 4% (1 request) were made to Matomo.rrz.uni-koeln.de. The less responsive or slowest element that took the longest time to load (789 ms) belongs to the original domain Uni-koeln.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 120.1 kB (14%)

Content Size

873.3 kB

After Optimization

753.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Uni-koeln.de main page is 873.3 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 604.6 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 98.5 kB

  • Original 111.9 kB
  • After minification 78.6 kB
  • After compression 13.4 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 33.3 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 98.5 kB or 88% of the original size.

Image Optimization

-2%

Potential reduce by 12.6 kB

  • Original 604.6 kB
  • After minification 592.1 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. Uni Koeln images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 113 B

  • Original 96.0 kB
  • After minification 96.0 kB
  • After compression 95.9 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

-15%

Potential reduce by 9.0 kB

  • Original 60.7 kB
  • After minification 60.7 kB
  • After compression 51.7 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. Uni-koeln.de needs all CSS files to be minified and compressed as it can save up to 9.0 kB or 15% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

21

After Optimization

21

  • Images
  • JavaScript
  • CSS

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Uni Koeln. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

uni-koeln.de accessibility score

90

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA IDs are not unique

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

uni-koeln.de best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

SEO Factors

uni-koeln.de SEO score

98

Search Engine Optimization Advices

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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Uni-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 Uni-koeln.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

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