Tools & Wizards About Us
vbz.ch screenshot

Report Summary

  • 9

    Performance

    Renders faster than
    23% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 53% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

vbz.ch

Verkehrsbetriebe Zürich - Stadt Zürich

Page Load Speed

7.7 sec in total

First Response

402 ms

Resources Loaded

6.2 sec

Page Rendered

1.1 sec

vbz.ch screenshot

About Website

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

Die Verkehrsbetriebe Zürich gehören zu Zürich wie der See. In ihren Fahrzeugen begegnen sich täglich 800'000 Fahrgäste - eine Bühne für spannende Geschichten.

Visit vbz.ch

Key Findings

We analyzed Vbz.ch page load time and found that the first response time was 402 ms and then it took 7.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

vbz.ch performance score

9

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

31/100

10%

LCP (Largest Contentful Paint)

Value10.5 s

0/100

25%

SI (Speed Index)

Value18.9 s

0/100

10%

TBT (Total Blocking Time)

Value2,100 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0.407

24/100

15%

TTI (Time to Interactive)

Value16.1 s

6/100

10%

Network Requests Diagram

vbz.ch

402 ms

vbz

2027 ms

critical-oldcd.min.css

359 ms

stzh-components.css

372 ms

stzh-components.js

423 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Vbz.ch, 50% (23 requests) were made to Vbzonline.ch and 46% (21 requests) were made to Stadt-zuerich.ch. The less responsive or slowest element that took the longest time to load (2.2 sec) relates to the external source Fpcdn.zvv.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 125.0 kB (2%)

Content Size

5.1 MB

After Optimization

5.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Vbz.ch main page is 5.1 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. 40% of websites need less resources to load. Images take 4.0 MB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 103.9 kB

  • Original 117.1 kB
  • After minification 76.1 kB
  • After compression 13.2 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 41.0 kB, which is 35% 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 103.9 kB or 89% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 4.0 MB
  • After minification 4.0 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. Vbz images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 6.2 kB

  • Original 793.8 kB
  • After minification 793.8 kB
  • After compression 787.6 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

-7%

Potential reduce by 14.9 kB

  • Original 219.8 kB
  • After minification 219.5 kB
  • After compression 204.9 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. Vbz.ch has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 27 (66%)

Requests Now

41

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Vbz. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 11 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

vbz.ch

vbz.ch

402 ms

vbz

vbz

2027 ms

critical-oldcd.min.css

critical-oldcd.min.css

359 ms

stzh-components.css

stzh-components.css

372 ms

stzh-components.js

stzh-components.js

423 ms

head.min.js

head.min.js

319 ms

iframeResizer.min.js

iframeResizer.min.js

370 ms

launch-9189fcb507a0.min.js

launch-9189fcb507a0.min.js

833 ms

searchmask.min.js

searchmask.min.js

2181 ms

main.min.js

main.min.js

747 ms

ReadSpeaker.js

ReadSpeaker.js

365 ms

ReadSpeakerClassic.js

ReadSpeakerClassic.js

372 ms

customJs.min.js

customJs.min.js

370 ms

intersection-observer.min.js

intersection-observer.min.js

109 ms

vbz.svg

vbz.svg

111 ms

unternehmen_stadt_zuerich.svg

unternehmen_stadt_zuerich.svg

109 ms

vbz.min.css

vbz.min.css

226 ms

print.min.css

print.min.css

109 ms

fonts.css

fonts.css

110 ms

HelveticaNeueLTW01_55Roman.woff

HelveticaNeueLTW01_55Roman.woff

111 ms

HelveticaNeueLTW01_41488878.woff

HelveticaNeueLTW01_41488878.woff

214 ms

HelveticaNeueLTW01_71488914.woff

HelveticaNeueLTW01_71488914.woff

211 ms

sprite.svg

sprite.svg

113 ms

394 ms

style.min.css

style.min.css

111 ms

email-subscribers-public.css

email-subscribers-public.css

108 ms

style-script.css

style-script.css

106 ms

wpp.css

wpp.css

114 ms

style.css

style.css

124 ms

search-forms.css

search-forms.css

106 ms

wpp.min.js

wpp.min.js

240 ms

jquery.min.js

jquery.min.js

219 ms

email-subscribers-public.js

email-subscribers-public.js

205 ms

script.js

script.js

209 ms

runtime.js

runtime.js

209 ms

shortnews.js

shortnews.js

221 ms

navigation.js

navigation.js

303 ms

share.js

share.js

315 ms

logo-vbzonline.svg

logo-vbzonline.svg

102 ms

dzeniundalex-scaled.jpg

dzeniundalex-scaled.jpg

179 ms

323a5226-scaled.jpg

323a5226-scaled.jpg

172 ms

323a2165-kopie-scaled.jpg

323a2165-kopie-scaled.jpg

175 ms

vuebelle-illustration.jpg

vuebelle-illustration.jpg

458 ms

messmodul-version-1-scaled.jpg

messmodul-version-1-scaled.jpg

210 ms

neuzuzuger7-scaled.jpg

neuzuzuger7-scaled.jpg

486 ms

logo-vbz.svg

logo-vbz.svg

282 ms

Accessibility Review

vbz.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-*] attributes do not match their roles

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

<frame> or <iframe> elements do not have a title

High

Links do not have a discernible name

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

vbz.ch best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

vbz.ch SEO score

93

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 Vbz.ch 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 Vbz.ch 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

vbz.ch

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