Report Summary

  • 61

    Performance

    Renders faster than
    77% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 54% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    82% of websites

  • 93

    SEO

    Google-friendlier than
    84% of websites

gz-zh.ch

Zürcher Gemeinschaftszentren

Page Load Speed

4.7 sec in total

First Response

379 ms

Resources Loaded

4 sec

Page Rendered

321 ms

gz-zh.ch screenshot

About Website

Visit gz-zh.ch now to see the best up-to-date Gz Zh content for Switzerland and also check out these interesting facts you probably never knew about gz-zh.ch

Die Stiftung Zürcher Gemeinschaftszentren führt im Auftrag der Stadt Zürich die 17 Gemeinschaftszentren. Die 17 Gemeinschaftszentren (GZ) bieten vielfältige Möglichkeiten: Nutzen Sie unsere zahlreiche...

Visit gz-zh.ch

Key Findings

We analyzed Gz-zh.ch page load time and found that the first response time was 379 ms and then it took 4.3 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

gz-zh.ch performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

41/100

10%

LCP (Largest Contentful Paint)

Value5.3 s

22/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value260 ms

83/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value5.4 s

72/100

10%

Network Requests Diagram

gz-zh.ch

379 ms

www.gz-zh.ch

1909 ms

stylesheet_0e0543cce0.css

102 ms

style-home.css

209 ms

layout-home.css

211 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 96% of them (25 requests) were addressed to the original Gz-zh.ch, 4% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Gz-zh.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 379.6 kB (34%)

Content Size

1.1 MB

After Optimization

736.7 kB

In fact, the total size of Gz-zh.ch main page is 1.1 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. 20% of websites need less resources to load. Images take 644.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 8.9 kB

  • Original 11.5 kB
  • After minification 10.4 kB
  • After compression 2.7 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 8.9 kB or 77% of the original size.

Image Optimization

-5%

Potential reduce by 30.6 kB

  • Original 644.6 kB
  • After minification 614.0 kB

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. Gz Zh images are well optimized though.

JavaScript Optimization

-72%

Potential reduce by 285.3 kB

  • Original 395.6 kB
  • After minification 372.8 kB
  • After compression 110.2 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 285.3 kB or 72% of the original size.

CSS Optimization

-85%

Potential reduce by 54.9 kB

  • Original 64.6 kB
  • After minification 47.9 kB
  • After compression 9.7 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. Gz-zh.ch needs all CSS files to be minified and compressed as it can save up to 54.9 kB or 85% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (58%)

Requests Now

24

After Optimization

10

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Gz Zh. 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 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

gz-zh.ch accessibility score

82

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

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

gz-zh.ch best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

gz-zh.ch SEO score

93

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

Language and Encoding

  • Language Detected

    DE

  • Language Claimed

    EN

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Gz-zh.ch can be misinterpreted by Google and other search engines. Our service has detected that German is used on the page, and it does not match the claimed English language. Our system also found out that Gz-zh.ch main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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