Tools & Wizards About Us
fuelcenter.rwth-aachen.de screenshot

Report Summary

  • 52

    Performance

    Renders faster than
    69% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

fuelcenter.rwth-aachen.de

RWTH AACHEN UNIVERSITY The Fuel Science Center – Adaptive Conversion Systems for Renewable Energy and Carbon Sources - English

Page Load Speed

6.4 sec in total

First Response

750 ms

Resources Loaded

5.5 sec

Page Rendered

155 ms

fuelcenter.rwth-aachen.de screenshot

About Website

Click here to check amazing Fuel Center RWTH AACHEN content for Germany. Otherwise, check out these important facts you probably never knew about fuelcenter.rwth-aachen.de

RWTH Aachen University - The Fuel Science Center – Adaptive Conversion Systems for Renewable Energy and Carbon Sources - Homepage

Visit fuelcenter.rwth-aachen.de

Key Findings

We analyzed Fuelcenter.rwth-aachen.de page load time and found that the first response time was 750 ms and then it took 5.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

fuelcenter.rwth-aachen.de performance score

52

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.2 s

8/100

10%

LCP (Largest Contentful Paint)

Value6.8 s

7/100

25%

SI (Speed Index)

Value5.2 s

60/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.262

47/100

15%

TTI (Time to Interactive)

Value5.4 s

72/100

10%

Network Requests Diagram

fuelcenter.rwth-aachen.de

750 ms

fuelcenter.rwth-aachen.de

611 ms

184 ms

931 ms

aw_mobile.asp

218 ms

Our browser made a total of 32 requests to load all elements on the main page. We found that all of those requests were addressed to Fuelcenter.rwth-aachen.de and no external sources were called. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Fuelcenter.rwth-aachen.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 94.8 kB (8%)

Content Size

1.2 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Fuelcenter.rwth-aachen.de main page is 1.2 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. 25% of websites need less resources to load. Images take 889.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 20.4 kB

  • Original 26.4 kB
  • After minification 25.0 kB
  • After compression 5.9 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 20.4 kB or 77% of the original size.

Image Optimization

-1%

Potential reduce by 11.7 kB

  • Original 889.6 kB
  • After minification 877.9 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. Fuel Center RWTH AACHEN images are well optimized though.

JavaScript Optimization

-18%

Potential reduce by 49.6 kB

  • Original 270.1 kB
  • After minification 269.5 kB
  • After compression 220.4 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 49.6 kB or 18% of the original size.

CSS Optimization

-25%

Potential reduce by 13.1 kB

  • Original 51.3 kB
  • After minification 51.3 kB
  • After compression 38.2 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. Fuelcenter.rwth-aachen.de needs all CSS files to be minified and compressed as it can save up to 13.1 kB or 25% of the original size.

Requests Breakdown

Number of requests can be reduced by 16 (57%)

Requests Now

28

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Fuel Center RWTH AACHEN. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

fuelcenter.rwth-aachen.de

fuelcenter.rwth-aachen.de

750 ms

fuelcenter.rwth-aachen.de

fuelcenter.rwth-aachen.de

611 ms

184 ms

931 ms

aw_mobile.asp

aw_mobile.asp

218 ms

styles.css

styles.css

557 ms

jquery-3.6.0.js

jquery-3.6.0.js

1133 ms

jquery.ui-1.13.0.js

jquery.ui-1.13.0.js

1228 ms

__basic-behaviour.js

__basic-behaviour.js

589 ms

__base-modules.js

__base-modules.js

704 ms

__base-modules-2.js

__base-modules-2.js

860 ms

__rwth.js

__rwth.js

672 ms

customscript.js

customscript.js

698 ms

aw_mobile_jquery.js

aw_mobile_jquery.js

779 ms

show_picture.asp

show_picture.asp

427 ms

icon-sprites.png

icon-sprites.png

223 ms

teaser-wrapper-small-sprite.png

teaser-wrapper-small-sprite.png

109 ms

show_picture.asp

show_picture.asp

903 ms

show_picture.asp

show_picture.asp

890 ms

show_picture.asp

show_picture.asp

119 ms

show_picture.asp

show_picture.asp

1073 ms

border-50.png

border-50.png

227 ms

dotted-line-persona.png

dotted-line-persona.png

329 ms

line-color-teaser.png

line-color-teaser.png

333 ms

show_picture.asp

show_picture.asp

1282 ms

show_picture.asp

show_picture.asp

450 ms

gps16.png

gps16.png

536 ms

border-25.png

border-25.png

560 ms

icon-sprites-1.png

icon-sprites-1.png

764 ms

tablet.css

tablet.css

215 ms

tablet-portrait.css

tablet-portrait.css

217 ms

print.css

print.css

109 ms

Accessibility Review

fuelcenter.rwth-aachen.de accessibility score

84

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

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

fuelcenter.rwth-aachen.de best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

fuelcenter.rwth-aachen.de SEO score

100

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Fuelcenter.rwth-aachen.de can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Fuelcenter.rwth-aachen.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

fuelcenter.rwth-aachen.de

Open Graph description is not detected on the main page of Fuel Center RWTH AACHEN. 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: