Access aachen.de. www.aachen.de - Aachen - Willkommen im Stadtportal

name

value

score

weighting

FCP (First Contentful Paint)

Value5.4 s

6/100

10%

LCP (Largest Contentful Paint)

Value7.6 s

3/100

25%

SI (Speed Index)

Value7.9 s

22/100

10%

TBT (Total Blocking Time)

Value180 ms

92/100

30%

CLS (Cumulative Layout Shift)

Value0.901

3/100

15%

TTI (Time to Interactive)

Value11.6 s

18/100

10%

aachen.de

394 ms

aachen.de

606 ms

reset.css

199 ms

special.css

299 ms

service.css

302 ms

Our browser made a total of 93 requests to load all elements on the main page. We found that 87% of them (81 requests) were addressed to the original Aachen.de, 10% (9 requests) were made to Tile.openstreetmap.org and 1% (1 request) were made to Static.etracker.com. The less responsive or slowest element that took the longest time to load (759 ms) belongs to the original domain Aachen.de.

Content Size

2.7 MB

After Optimization

1.8 MB

In fact, the total size of Aachen.de main page is 2.7 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. 55% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 73.5 kB

Original 89.1 kB
After minification 79.0 kB
After compression 15.6 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 10.1 kB, which is 11% 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 73.5 kB or 83% of the original size.

Image Optimization

-19%

Potential reduce by 391.8 kB

Original 2.0 MB
After minification 1.6 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, Aachen needs image optimization as it can save up to 391.8 kB or 19% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-65%

Potential reduce by 294.6 kB

Original 454.9 kB
After minification 442.5 kB
After compression 160.3 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 294.6 kB or 65% of the original size.

CSS Optimization

-85%

Potential reduce by 93.4 kB

Original 110.1 kB
After minification 77.4 kB
After compression 16.7 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. Aachen.de needs all CSS files to be minified and compressed as it can save up to 93.4 kB or 85% of the original size.

Requests Now

After Optimization

The browser has sent 85 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 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 13 to 1 for JavaScripts and from 12 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

[aria-hidden="true"] elements contain focusable descendents

High

ARIA input fields do not have accessible names

High

[role] values are not valid

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

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.

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

Language and Encoding

Language Detected

DE
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Aachen.de can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 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

aachen.de

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

Report Summary

Performance

Accessibility

Best Practices

SEO

www.aachen.de - Aachen - Willkommen im Stadtportal

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

aachen.de

aachen.de

reset.css

special.css

service.css

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

aachen.de

aachen.de

reset.css

special.css

service.css

fonts.css

navi_2016.css

linkenavi_2016.css

lightbox.css

styles2016.css

jquery.js

jquery-ui.js

javascripts.js

lightbox.js

standard.js

leaflet_css.css

leaflet_js.js

slick.css

slick-theme.css

e.js

jquery_min.js

masonry_pkgd_min.js

jquery_flexslider-min.js

slick_min.js

schrift.png

sonne.png

icon_header_facebook.png

icon_header_twitter.png

icon_header_instagram.png

icon_header_mastodon.png

Logo_1400px.png

stadt-aachen.png

Icon_MeinAachen_anmelden.png

banner_kp24_850.png

HeaderAachenKlima.jpg

stadtac_banner_850x300_2024_3rides.jpg

Soziales_Header_850x300.jpg

aachenbewegt_hedaer_850x300_final.jpg

Willkommen_850.jpg

icon_lupe.png

aachen_web_115_klein.png

aachen_web_geodatenbank_klein.png

icons_beschwerdemanagment_35.png