Tools & Wizards About Us
steb-koeln.de screenshot

Report Summary

  • 20

    Performance

    Renders faster than
    37% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 45% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

steb-koeln.de

StEB Köln: Startseite

Page Load Speed

4.1 sec in total

First Response

381 ms

Resources Loaded

3.2 sec

Page Rendered

476 ms

steb-koeln.de screenshot

About Website

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

Die StEB Köln sind ein Dienstleistungsunternehmen der Wasserwirtschaft und ein zentraler Baustein der öffentlichen Daseinsvorsorge. Für ein gesundes Lebensumfeld reinigen wir Abwasser, schützen vor Üb...

Visit steb-koeln.de

Key Findings

We analyzed Steb-koeln.de page load time and found that the first response time was 381 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

steb-koeln.de performance score

20

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.0 s

0/100

10%

LCP (Largest Contentful Paint)

Value14.9 s

0/100

25%

SI (Speed Index)

Value11.4 s

5/100

10%

TBT (Total Blocking Time)

Value590 ms

50/100

30%

CLS (Cumulative Layout Shift)

Value0.343

32/100

15%

TTI (Time to Interactive)

Value22.3 s

1/100

10%

Network Requests Diagram

steb-koeln.de

381 ms

www.steb-koeln.de

305 ms

combined.css

306 ms

custom.modernizr.js

203 ms

jquery.min.js

5 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 91% of them (39 requests) were addressed to the original Steb-koeln.de, 5% (2 requests) were made to Google-analytics.com and 2% (1 request) were made to Ajax.googleapis.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Steb-koeln.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 716.2 kB (26%)

Content Size

2.8 MB

After Optimization

2.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Steb-koeln.de main page is 2.8 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. 40% of websites need less resources to load. Images take 1.9 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 26.6 kB

  • Original 34.8 kB
  • After minification 30.7 kB
  • After compression 8.1 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 4.1 kB, which is 12% 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 26.6 kB or 77% of the original size.

Image Optimization

-3%

Potential reduce by 63.1 kB

  • Original 1.9 MB
  • After minification 1.8 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. StEB Koeln images are well optimized though.

JavaScript Optimization

-73%

Potential reduce by 441.0 kB

  • Original 600.1 kB
  • After minification 544.9 kB
  • After compression 159.1 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 441.0 kB or 73% of the original size.

CSS Optimization

-86%

Potential reduce by 185.5 kB

  • Original 215.1 kB
  • After minification 207.9 kB
  • After compression 29.6 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. Steb-koeln.de needs all CSS files to be minified and compressed as it can save up to 185.5 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (31%)

Requests Now

39

After Optimization

27

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of StEB 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 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

steb-koeln.de

steb-koeln.de

381 ms

www.steb-koeln.de

www.steb-koeln.de

305 ms

combined.css

combined.css

306 ms

custom.modernizr.js

custom.modernizr.js

203 ms

jquery.min.js

jquery.min.js

5 ms

JS-Combined.js

JS-Combined.js

693 ms

logo_small.jpg

logo_small.jpg

290 ms

logo.jpg

logo.jpg

296 ms

icon-search.png

icon-search.png

204 ms

icon-info-orange.png

icon-info-orange.png

202 ms

Ajax-Loader.gif

Ajax-Loader.gif

204 ms

arrow-right.png

arrow-right.png

511 ms

stadtentwaesserungsbetriebe_koeln_1920x400.jpg

stadtentwaesserungsbetriebe_koeln_1920x400.jpg

907 ms

hausbesitzer_1920x400.jpg

hausbesitzer_1920x400.jpg

907 ms

stadtentwaesserungsbetriebe-_koeln_1920x400.jpg

stadtentwaesserungsbetriebe-_koeln_1920x400.jpg

1076 ms

uebersicht_1000x_.jpg

uebersicht_1000x_.jpg

1180 ms

Ausbildung_FK-Abwassertechnik_8_1000x_.jpg

Ausbildung_FK-Abwassertechnik_8_1000x_.jpg

944 ms

StEB_34548_1000x_.jpg

StEB_34548_1000x_.jpg

1189 ms

StEB_41399_1000x_.jpg

StEB_41399_1000x_.jpg

1578 ms

StEB_55369_1000x_.jpg

StEB_55369_1000x_.jpg

1692 ms

Gruppe_alle-0351_Netz_1000x_.jpg

Gruppe_alle-0351_Netz_1000x_.jpg

1375 ms

logo_audit_familieundberuf__x110.png

logo_audit_familieundberuf__x110.png

1278 ms

footer_logo_1__x110.png

footer_logo_1__x110.png

1381 ms

footer_logo_3__x110.png

footer_logo_3__x110.png

1385 ms

gtm.js

gtm.js

70 ms

main-menu-bg.png

main-menu-bg.png

1464 ms

rhein_hg.png

rhein_hg.png

2023 ms

icon-users.png

icon-users.png

1543 ms

icon-guide.png

icon-guide.png

1550 ms

icon-newspaper.png

icon-newspaper.png

1640 ms

icon-info.png

icon-info.png

1732 ms

quaysansregular-woff.woff

quaysansregular-woff.woff

1829 ms

quaysanslight-woff.woff

quaysanslight-woff.woff

1844 ms

analytics.js

analytics.js

6 ms

collect

collect

11 ms

gauge_text.json

gauge_text.json

1460 ms

Pegel-Request-Neu.jsp

Pegel-Request-Neu.jsp

1467 ms

rhein_wellen.png

rhein_wellen.png

1478 ms

icon-prev.png

icon-prev.png

1566 ms

icon-next.png

icon-next.png

1576 ms

bg-input-focus-steb.png

bg-input-focus-steb.png

1578 ms

rhein_boden_pegel_1.png

rhein_boden_pegel_1.png

170 ms

css_print.css

css_print.css

101 ms

Accessibility Review

steb-koeln.de accessibility score

78

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

Internationalization and localization

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

Impact

Issue

High

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

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

Form elements do not have associated labels

High

Links do not have a discernible name

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

steb-koeln.de best practices score

58

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

steb-koeln.de SEO score

82

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

High

Tap targets are not sized appropriately

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 Steb-koeln.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 Steb-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

steb-koeln.de

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