Tools & Wizards About Us
zoobasel.ch screenshot

Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

zoobasel.ch

Zoo Basel

Page Load Speed

4.6 sec in total

First Response

436 ms

Resources Loaded

3.8 sec

Page Rendered

284 ms

zoobasel.ch screenshot

About Website

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

Der Zoo Basel fasziniert seit seiner Eröffnung 1874 seine BesucherInnen. Erfahren Sie alles rund um den Zolli.

Visit zoobasel.ch

Key Findings

We analyzed Zoobasel.ch page load time and found that the first response time was 436 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

zoobasel.ch performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value9.7 s

0/100

10%

LCP (Largest Contentful Paint)

Value12.2 s

0/100

25%

SI (Speed Index)

Value15.8 s

0/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value1.244

1/100

15%

TTI (Time to Interactive)

Value17.6 s

4/100

10%

Network Requests Diagram

zoobasel.ch

436 ms

zoobasel.ch

411 ms

www.zoobasel.ch

405 ms

167 ms

all.min.css

328 ms

Our browser made a total of 50 requests to load all elements on the main page. We found that all of those requests were addressed to Zoobasel.ch and no external sources were called. The less responsive or slowest element that took the longest time to load (882 ms) belongs to the original domain Zoobasel.ch.

Page Optimization Overview & Recommendations

Page size can be reduced by 167.0 kB (35%)

Content Size

482.9 kB

After Optimization

315.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Zoobasel.ch main page is 482.9 kB. 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. CSS take 223.7 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 50.3 kB

  • Original 60.0 kB
  • After minification 50.5 kB
  • After compression 9.7 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. This page needs HTML code to be minified as it can gain 9.5 kB, which is 16% 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 50.3 kB or 84% of the original size.

Image Optimization

-14%

Potential reduce by 2.3 kB

  • Original 16.6 kB
  • After minification 14.3 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. Obviously, Zoo Basel needs image optimization as it can save up to 2.3 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-23%

Potential reduce by 41.7 kB

  • Original 182.6 kB
  • After minification 182.6 kB
  • After compression 140.9 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 41.7 kB or 23% of the original size.

CSS Optimization

-33%

Potential reduce by 72.7 kB

  • Original 223.7 kB
  • After minification 223.4 kB
  • After compression 151.0 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. Zoobasel.ch needs all CSS files to be minified and compressed as it can save up to 72.7 kB or 33% of the original size.

Requests Breakdown

Number of requests can be reduced by 34 (89%)

Requests Now

38

After Optimization

4

  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zoo Basel. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 17 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zoobasel.ch

zoobasel.ch

436 ms

zoobasel.ch

zoobasel.ch

411 ms

www.zoobasel.ch

www.zoobasel.ch

405 ms

167 ms

all.min.css

all.min.css

328 ms

bootstrap.min.css

bootstrap.min.css

532 ms

swf_stylesheets.css

swf_stylesheets.css

424 ms

dmxAppConnect.js

dmxAppConnect.js

527 ms

jquery-3.4.1.slim.min.js

jquery-3.4.1.slim.min.js

521 ms

dmxSwiper.js

dmxSwiper.js

428 ms

swiper.min.js

swiper.min.js

453 ms

dmxLazyLoad.js

dmxLazyLoad.js

553 ms

lazysizes.min.js

lazysizes.min.js

560 ms

dmxSmoothScroll.js

dmxSmoothScroll.js

572 ms

dmxBootstrap4Collapse.js

dmxBootstrap4Collapse.js

640 ms

dmxFormatter.js

dmxFormatter.js

649 ms

dmxBrowser.js

dmxBrowser.js

648 ms

dmxBootstrap4Modal.js

dmxBootstrap4Modal.js

673 ms

trackingController.js

trackingController.js

674 ms

dmxStateManagement.js

dmxStateManagement.js

692 ms

swiper.min.css

swiper.min.css

758 ms

animate.min.css

animate.min.css

770 ms

dmxAnimateCSS.js

dmxAnimateCSS.js

767 ms

dmxBootstrap4Navigation.js

dmxBootstrap4Navigation.js

791 ms

dmxBootstrap4Alert.js

dmxBootstrap4Alert.js

789 ms

popper.min.js

popper.min.js

810 ms

bootstrap.min.js

bootstrap.min.js

876 ms

swf_scripts.js

swf_scripts.js

882 ms

swf_basics.css

swf_basics.css

483 ms

swf_forms.css

swf_forms.css

501 ms

swf_layout.css

swf_layout.css

492 ms

swf_colors.css

swf_colors.css

511 ms

swf_header.css

swf_header.css

575 ms

swf_navbar.css

swf_navbar.css

581 ms

swf_cards.css

swf_cards.css

605 ms

swf_nav.css

swf_nav.css

614 ms

swf_tables.css

swf_tables.css

618 ms

swf_grids.css

swf_grids.css

626 ms

swf_responsive.css

swf_responsive.css

694 ms

stylesheet.css

stylesheet.css

697 ms

zoo-logo-white-de.png

zoo-logo-white-de.png

121 ms

logo-kultur.png

logo-kultur.png

121 ms

CircularXXWeb-Regular.woff

CircularXXWeb-Regular.woff

316 ms

zoobold-webfont.woff

zoobold-webfont.woff

122 ms

fa-regular-400.ttf

fa-regular-400.ttf

707 ms

fa-light-300.ttf

fa-light-300.ttf

715 ms

fa-thin-100.ttf

fa-thin-100.ttf

714 ms

fa-solid-900.ttf

fa-solid-900.ttf

416 ms

CircularXXWeb-Medium.woff

CircularXXWeb-Medium.woff

289 ms

fa-brands-400.ttf

fa-brands-400.ttf

486 ms

Accessibility Review

zoobasel.ch accessibility score

73

Accessibility Issues

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

High

Form elements do not have associated labels

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

[id] attributes on active, focusable elements are not unique

Best Practices

zoobasel.ch best practices score

67

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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

zoobasel.ch SEO score

85

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

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

    DE

  • Encoding

    UTF-8

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

zoobasel.ch

Open Graph data is detected on the main page of Zoo Basel. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: