Tools & Wizards About Us
bkb-duesseldorf.de screenshot

Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

bkb-duesseldorf.de

Berufskolleg Bachstraße 8 in 40233 Düsseldorf - Tel: 0211 8922-411

Page Load Speed

4.5 sec in total

First Response

402 ms

Resources Loaded

3.8 sec

Page Rendered

310 ms

bkb-duesseldorf.de screenshot

About Website

Click here to check amazing Bkb Duesseldorf content for Germany. Otherwise, check out these important facts you probably never knew about bkb-duesseldorf.de

Das Berufskolleg Bachstraße zählt zu den größten beruflichen Schulen kaufmännischer Bildung in der Landeshauptstadt Düsseldorf.

Visit bkb-duesseldorf.de

Key Findings

We analyzed Bkb-duesseldorf.de page load time and found that the first response time was 402 ms and then it took 4.1 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

bkb-duesseldorf.de performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.1 s

3/100

10%

LCP (Largest Contentful Paint)

Value22.3 s

0/100

25%

SI (Speed Index)

Value16.9 s

0/100

10%

TBT (Total Blocking Time)

Value290 ms

80/100

30%

CLS (Cumulative Layout Shift)

Value0.313

37/100

15%

TTI (Time to Interactive)

Value17.0 s

4/100

10%

Network Requests Diagram

bkb-duesseldorf.de

402 ms

www.bkb-duesseldorf.de

335 ms

www.bkb-duesseldorf.de

603 ms

bootstrap.min.css

330 ms

font-awesome.min.css

442 ms

Our browser made a total of 69 requests to load all elements on the main page. We found that all of those requests were addressed to Bkb-duesseldorf.de and no external sources were called. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Bkb-duesseldorf.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.5 MB (24%)

Content Size

6.2 MB

After Optimization

4.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Bkb-duesseldorf.de main page is 6.2 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. 65% of websites need less resources to load. Images take 4.6 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 52.8 kB

  • Original 61.8 kB
  • After minification 46.2 kB
  • After compression 9.0 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 15.6 kB, which is 25% 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 52.8 kB or 85% of the original size.

Image Optimization

-4%

Potential reduce by 192.9 kB

  • Original 4.6 MB
  • After minification 4.4 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. Bkb Duesseldorf images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 528.6 kB

  • Original 730.8 kB
  • After minification 692.7 kB
  • After compression 202.2 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 528.6 kB or 72% of the original size.

CSS Optimization

-87%

Potential reduce by 727.0 kB

  • Original 831.2 kB
  • After minification 742.4 kB
  • After compression 104.1 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. Bkb-duesseldorf.de needs all CSS files to be minified and compressed as it can save up to 727.0 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 36 (56%)

Requests Now

64

After Optimization

28

  • Images
  • JavaScript
  • CSS

The browser has sent 64 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Bkb Duesseldorf. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 16 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

bkb-duesseldorf.de

bkb-duesseldorf.de

402 ms

www.bkb-duesseldorf.de

www.bkb-duesseldorf.de

335 ms

www.bkb-duesseldorf.de

www.bkb-duesseldorf.de

603 ms

bootstrap.min.css

bootstrap.min.css

330 ms

font-awesome.min.css

font-awesome.min.css

442 ms

animate.min.css

animate.min.css

551 ms

simple-line-icons.min.css

simple-line-icons.min.css

338 ms

owl.carousel.min.css

owl.carousel.min.css

339 ms

owl.theme.default.min.css

owl.theme.default.min.css

338 ms

magnific-popup.min.css

magnific-popup.min.css

440 ms

theme.css

theme.css

663 ms

theme-elements.css

theme-elements.css

777 ms

theme-blog.css

theme-blog.css

442 ms

settings.css

settings.css

552 ms

layers.css

layers.css

771 ms

navigation.css

navigation.css

784 ms

component.css

component.css

659 ms

default.css

default.css

878 ms

custom.css

custom.css

770 ms

modernizr.min.js

modernizr.min.js

785 ms

jquery.min.js

jquery.min.js

989 ms

jquery.appear.min.js

jquery.appear.min.js

963 ms

jquery.easing.min.js

jquery.easing.min.js

964 ms

jquery-cookie.min.js

jquery-cookie.min.js

963 ms

bootstrap.min.js

bootstrap.min.js

964 ms

common.min.js

common.min.js

987 ms

jquery.validation.min.js

jquery.validation.min.js

1016 ms

jquery.easy-pie-chart.min.js

jquery.easy-pie-chart.min.js

1017 ms

jquery.gmap.min.js

jquery.gmap.min.js

1018 ms

jquery.lazyload.min.js

jquery.lazyload.min.js

1017 ms

jquery.isotope.min.js

jquery.isotope.min.js

1097 ms

owl.carousel.min.js

owl.carousel.min.js

1101 ms

jquery.magnific-popup.js

jquery.magnific-popup.js

1103 ms

vide.min.js

vide.min.js

1106 ms

theme.js

theme.js

1208 ms

jquery.themepunch.tools.min.js

jquery.themepunch.tools.min.js

1212 ms

jquery.themepunch.revolution.min.js

jquery.themepunch.revolution.min.js

1426 ms

jquery.flipshow.min.js

jquery.flipshow.min.js

1207 ms

view.home.js

view.home.js

1207 ms

custom.js

custom.js

881 ms

theme.init.js

theme.init.js

986 ms

logo-berufskolleg-80.jpg

logo-berufskolleg-80.jpg

406 ms

webuntis-icon.png

webuntis-icon.png

407 ms

start05.jpg

start05.jpg

662 ms

start04.jpg

start04.jpg

659 ms

berufskolleg_bachstrasse_weiterbildung(1).jpg

berufskolleg_bachstrasse_weiterbildung(1).jpg

1505 ms

img_5977be.jpg

img_5977be.jpg

1392 ms

start01.jpg

start01.jpg

1074 ms

flaggen.jpg

flaggen.jpg

734 ms

grafik-europatag.jpg

grafik-europatag.jpg

662 ms

fama-fahm-news.jpg

fama-fahm-news.jpg

740 ms

work-hard-news.png

work-hard-news.png

858 ms

frontpage.jpg

frontpage.jpg

846 ms

logo01.jpg

logo01.jpg

850 ms

schulische_ausbildung_berufskolleg_bachstrasse.jpg

schulische_ausbildung_berufskolleg_bachstrasse.jpg

955 ms

berufskolleg_bachstrasse_ausbildung.png

berufskolleg_bachstrasse_ausbildung.png

917 ms

berufskolleg_bachstrasse_weiterbildung2.jpg

berufskolleg_bachstrasse_weiterbildung2.jpg

921 ms

logo-berufswahlsiegel.png

logo-berufswahlsiegel.png

1027 ms

ziele-ne-100x60.jpg

ziele-ne-100x60.jpg

1028 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

1031 ms

logo03.jpg

logo03.jpg

1106 ms

logo04.jpg

logo04.jpg

1077 ms

logo05.jpg

logo05.jpg

1083 ms

protandem2.png

protandem2.png

1089 ms

msm-logo-klein.png

msm-logo-klein.png

1184 ms

pacemaker.jpg

pacemaker.jpg

1182 ms

aubi-plus2.png

aubi-plus2.png

1109 ms

erasmus_partnerlabel_2.jpg

erasmus_partnerlabel_2.jpg

1111 ms

revicons.woff

revicons.woff

713 ms

Accessibility Review

bkb-duesseldorf.de accessibility score

65

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

[role]s are not contained by their required parent element

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

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

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

bkb-duesseldorf.de best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

bkb-duesseldorf.de SEO score

88

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

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 Bkb-duesseldorf.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 Bkb-duesseldorf.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

bkb-duesseldorf.de

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