Tools & Wizards About Us
zakk.de screenshot

Report Summary

  • 62

    Performance

    Renders faster than
    76% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 78% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

zakk.de

zakk - Zentrum für Aktion, Kultur und Kommunikation - startseite

Page Load Speed

4.1 sec in total

First Response

318 ms

Resources Loaded

3.3 sec

Page Rendered

506 ms

zakk.de screenshot

About Website

Visit zakk.de now to see the best up-to-date Zakk content for Germany and also check out these interesting facts you probably never knew about zakk.de

zakk ist ein soziokulturelles Zentrum in Düsseldorf mit einem vielfältigen und ambitionierten Kulturprogramm. Das Programm setzt sich zusammen aus den Schwerpunkten Wort & Bühne (Literatur, Kabarett),...

Visit zakk.de

Key Findings

We analyzed Zakk.de page load time and found that the first response time was 318 ms and then it took 3.8 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

zakk.de performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.8 s

91/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

41/100

25%

SI (Speed Index)

Value5.5 s

54/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value1.09

1/100

15%

TTI (Time to Interactive)

Value5.3 s

72/100

10%

Network Requests Diagram

zakk.de

318 ms

zakk.de

1103 ms

base.css

97 ms

jquery.bxslider.css

186 ms

meanmenu.css

273 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that all of those requests were addressed to Zakk.de and no external sources were called. The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Zakk.de.

Page Optimization Overview & Recommendations

Page size can be reduced by 297.0 kB (9%)

Content Size

3.4 MB

After Optimization

3.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zakk.de main page is 3.4 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. 40% of websites need less resources to load. Images take 3.3 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 38.8 kB

  • Original 45.7 kB
  • After minification 37.1 kB
  • After compression 6.9 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. This page needs HTML code to be minified as it can gain 8.6 kB, which is 19% 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 38.8 kB or 85% of the original size.

Image Optimization

-7%

Potential reduce by 240.9 kB

  • Original 3.3 MB
  • After minification 3.0 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. Zakk images are well optimized though.

JavaScript Optimization

-15%

Potential reduce by 13.8 kB

  • Original 92.1 kB
  • After minification 92.1 kB
  • After compression 78.4 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 13.8 kB or 15% of the original size.

CSS Optimization

-18%

Potential reduce by 3.5 kB

  • Original 20.1 kB
  • After minification 20.1 kB
  • After compression 16.6 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. Zakk.de needs all CSS files to be minified and compressed as it can save up to 3.5 kB or 18% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (29%)

Requests Now

38

After Optimization

27

  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zakk. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zakk.de

zakk.de

318 ms

zakk.de

zakk.de

1103 ms

base.css

base.css

97 ms

jquery.bxslider.css

jquery.bxslider.css

186 ms

meanmenu.css

meanmenu.css

273 ms

mediaqueries.css

mediaqueries.css

277 ms

alert.css

alert.css

273 ms

13702.jpg

13702.jpg

654 ms

13515.jpg

13515.jpg

656 ms

13930.jpg

13930.jpg

659 ms

13724.jpg

13724.jpg

900 ms

13904.jpg

13904.jpg

447 ms

keinaltfuernazis_q.jpg

keinaltfuernazis_q.jpg

1123 ms

13725.jpg

13725.jpg

970 ms

13726.jpg

13726.jpg

1126 ms

jquery-1.9.1.min.js

jquery-1.9.1.min.js

762 ms

jquery-ui.min.js

jquery-ui.min.js

755 ms

isotope.min.js

isotope.min.js

867 ms

jquery.meanmenu.min.js

jquery.meanmenu.min.js

857 ms

jquery.bxslider.min.js

jquery.bxslider.min.js

961 ms

functions.js

functions.js

963 ms

jstoken.js

jstoken.js

983 ms

alert.js

alert.js

1056 ms

13766.jpg

13766.jpg

1254 ms

13424.jpg

13424.jpg

1414 ms

13929.jpg

13929.jpg

1391 ms

13928.jpg

13928.jpg

1760 ms

13906.jpg

13906.jpg

1479 ms

13950.jpg

13950.jpg

1449 ms

14016.jpg

14016.jpg

1447 ms

14051.jpg

14051.jpg

1666 ms

13996.jpg

13996.jpg

1590 ms

13976.jpg

13976.jpg

1730 ms

13977.jpg

13977.jpg

1645 ms

zakk-logo.svg

zakk-logo.svg

1295 ms

button-sprite.svg

button-sprite.svg

1390 ms

image-mask.png

image-mask.png

1396 ms

duesseldorf-logo.png

duesseldorf-logo.png

1458 ms

Roboto-Light-webfont.woff

Roboto-Light-webfont.woff

1445 ms

robotocondensed-light-webfont.woff

robotocondensed-light-webfont.woff

1453 ms

bx_loader.gif

bx_loader.gif

675 ms

controls.png

controls.png

727 ms

Accessibility Review

zakk.de accessibility score

92

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-hidden="true"] elements contain focusable descendents

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.

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

Best Practices

zakk.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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

zakk.de SEO score

92

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

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 Zakk.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 Zakk.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

zakk.de

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