Tools & Wizards About Us
jdbk.de screenshot

Report Summary

  • 89

    Performance

    Renders faster than
    90% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 86% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

jdbk.de

Joseph-DuMont-Berufskolleg - selbstorganisiert und mediengestützt lernen an einer guten, gesunden Schule

Page Load Speed

5.1 sec in total

First Response

304 ms

Resources Loaded

3.5 sec

Page Rendered

1.4 sec

jdbk.de screenshot

About Website

Click here to check amazing Jdbk content for Germany. Otherwise, check out these important facts you probably never knew about jdbk.de

Joseph-DuMont-Berufskolleg Köln - selbstorganisiert und mediengestützt lernen an einer guten, gesunden Schule

Visit jdbk.de

Key Findings

We analyzed Jdbk.de page load time and found that the first response time was 304 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

jdbk.de performance score

89

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

76/100

10%

LCP (Largest Contentful Paint)

Value3.1 s

74/100

25%

SI (Speed Index)

Value4.2 s

77/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value2.2 s

99/100

10%

Network Requests Diagram

jdbk.de

304 ms

jdbk.de

421 ms

www.jdbk.de

736 ms

template.min.js

200 ms

core.min.js

290 ms

Our browser made a total of 48 requests to load all elements on the main page. We found that all of those requests were addressed to Jdbk.de and no external sources were called. The less responsive or slowest element that took the longest time to load (1.7 sec) belongs to the original domain Jdbk.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 114.0 kB (1%)

Content Size

12.4 MB

After Optimization

12.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Jdbk.de main page is 12.4 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. 35% of websites need less resources to load. Images take 12.2 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 101.1 kB

  • Original 121.5 kB
  • After minification 117.3 kB
  • After compression 20.4 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. 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 101.1 kB or 83% of the original size.

Image Optimization

-0%

Potential reduce by 12.2 kB

  • Original 12.2 MB
  • After minification 12.2 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. Jdbk images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 416 B

  • Original 40.0 kB
  • After minification 40.0 kB
  • After compression 39.6 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

-3%

Potential reduce by 291 B

  • Original 9.6 kB
  • After minification 9.6 kB
  • After compression 9.3 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. Jdbk.de has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 18 (40%)

Requests Now

45

After Optimization

27

  • Images
  • JavaScript
  • CSS

The browser has sent 45 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jdbk. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jdbk.de

jdbk.de

304 ms

jdbk.de

jdbk.de

421 ms

www.jdbk.de

www.jdbk.de

736 ms

template.min.js

template.min.js

200 ms

core.min.js

core.min.js

290 ms

finder-es5.min.js

finder-es5.min.js

288 ms

messages-es5.min.js

messages-es5.min.js

287 ms

awesomplete.min.js

awesomplete.min.js

290 ms

finder.min.js

finder.min.js

287 ms

menu-es5.min.js

menu-es5.min.js

298 ms

tiny-slider.js

tiny-slider.js

424 ms

messages.min.js

messages.min.js

383 ms

kcm.1.2.0.min.js

kcm.1.2.0.min.js

383 ms

template.css

template.css

329 ms

awesomplete.css

awesomplete.css

328 ms

joomla-alert.min.css

joomla-alert.min.css

347 ms

content.min.css

content.min.css

389 ms

kcm.1.2.0.min.css

kcm.1.2.0.min.css

391 ms

logomark_jdbk.png

logomark_jdbk.png

113 ms

2.2.jpg

2.2.jpg

662 ms

jp_berufskolleg_006.jpg

jp_berufskolleg_006.jpg

664 ms

1.2%20SuS.jpg

1.2%20SuS.jpg

1694 ms

2.%20jp_berufskolleg_004.jpg

2.%20jp_berufskolleg_004.jpg

929 ms

3.2.jpg

3.2.jpg

830 ms

Alter5.jpg

Alter5.jpg

683 ms

anmeldung_blau.png

anmeldung_blau.png

762 ms

calendar.png

calendar.png

758 ms

bildungsgaenge.png

bildungsgaenge.png

782 ms

Wurde_des_Menschen.jpg

Wurde_des_Menschen.jpg

1325 ms

Deutscher_Schulpreis_2024.jpg

Deutscher_Schulpreis_2024.jpg

860 ms

Fashion.jpg

Fashion.jpg

881 ms

PiekII.jpg

PiekII.jpg

927 ms

school-building.png

school-building.png

958 ms

anmeldung-secondary.png

anmeldung-secondary.png

980 ms

messages-people-person-bubble-circle-1.png

messages-people-person-bubble-circle-1.png

1024 ms

Instagram.jpg

Instagram.jpg

1025 ms

Facebook.png

Facebook.png

1054 ms

NRW%20Bildung%20und%20Gesundheit.jpg

NRW%20Bildung%20und%20Gesundheit.jpg

1078 ms

Nutzungsordnung.jpg

Nutzungsordnung.jpg

1119 ms

chevron-right-blue.svg

chevron-right-blue.svg

1034 ms

leadingintro_top-desktop.svg

leadingintro_top-desktop.svg

1065 ms

leadingintro_bottom-desktop.svg

leadingintro_bottom-desktop.svg

1092 ms

quotecontainer_top.svg

quotecontainer_top.svg

1129 ms

quotecontainer_bottom.svg

quotecontainer_bottom.svg

1132 ms

grunge_footer.svg

grunge_footer.svg

1165 ms

chevron-right-white.svg

chevron-right-white.svg

1191 ms

mailicon.svg

mailicon.svg

1229 ms

mapicon.svg

mapicon.svg

1227 ms

Accessibility Review

jdbk.de accessibility score

95

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 input fields do not have accessible names

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

Best Practices

jdbk.de best practices score

67

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

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

Page has valid source maps

SEO Factors

jdbk.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

    DE

  • Language Claimed

    DE

  • Encoding

    UTF-8

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

jdbk.de

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