Tools & Wizards About Us

Report Summary

  • 22

    Performance

    Renders faster than
    40% of other websites

  • 88

    Accessibility

    Visual factors better than
    that of 68% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 84

    SEO

    Google-friendlier than
    52% of websites

chesterzoo.org

Chester Zoo | UK's best zoo

Page Load Speed

4.2 sec in total

First Response

174 ms

Resources Loaded

2.6 sec

Page Rendered

1.5 sec

About Website

Click here to check amazing Chester Zoo content for United Kingdom. Otherwise, check out these important facts you probably never knew about chesterzoo.org

Conservation starts with you. Buy your tickets and plan your visit to the UK’s best zoo, and discover more about the vital conservation and pioneering science that starts here at Chester Zoo.

Visit chesterzoo.org

Key Findings

We analyzed Chesterzoo.org page load time and found that the first response time was 174 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

chesterzoo.org performance score

22

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value15.9 s

0/100

25%

SI (Speed Index)

Value7.6 s

26/100

10%

TBT (Total Blocking Time)

Value1,050 ms

25/100

30%

CLS (Cumulative Layout Shift)

Value0.277

44/100

15%

TTI (Time to Interactive)

Value9.1 s

33/100

10%

Network Requests Diagram

chesterzoo.org

174 ms

chesterzoo.org

306 ms

www.chesterzoo.org

1048 ms

_dmptv4.js

55 ms

main.css

142 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 82% of them (37 requests) were addressed to the original Chesterzoo.org, 7% (3 requests) were made to Cdn-ukwest.onetrust.com and 4% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Chesterzoo.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.1 MB (32%)

Content Size

3.5 MB

After Optimization

2.4 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Chesterzoo.org main page is 3.5 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. 60% of websites need less resources to load. Images take 2.0 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 79.3 kB

  • Original 98.5 kB
  • After minification 80.6 kB
  • After compression 19.2 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 17.9 kB, which is 18% 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 79.3 kB or 81% of the original size.

Image Optimization

-0%

Potential reduce by 940 B

  • Original 2.0 MB
  • After minification 2.0 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. Chester Zoo images are well optimized though.

JavaScript Optimization

-10%

Potential reduce by 31.7 kB

  • Original 314.6 kB
  • After minification 314.6 kB
  • After compression 282.8 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

-90%

Potential reduce by 1.0 MB

  • Original 1.1 MB
  • After minification 1.1 MB
  • After compression 113.4 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. Chesterzoo.org needs all CSS files to be minified and compressed as it can save up to 1.0 MB or 90% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (30%)

Requests Now

37

After Optimization

26

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chester Zoo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

chesterzoo.org accessibility score

88

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

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

chesterzoo.org best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

chesterzoo.org SEO score

84

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

Links do not have descriptive text

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chesterzoo.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Chesterzoo.org 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

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