Report Summary

  • 23

    Performance

    Renders faster than
    43% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 67% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

overloonzoo.nl

Ga mee op expeditie in ZooParc Overloon!

Page Load Speed

4.1 sec in total

First Response

1 sec

Resources Loaded

2.8 sec

Page Rendered

337 ms

overloonzoo.nl screenshot

About Website

Click here to check amazing Overloon Zoo content. Otherwise, check out these important facts you probably never knew about overloonzoo.nl

Als een echte ontdekkingsreiziger verken je in ZooParc Overloon de gebieden waar cheeta's, tijgers, apen en nog veel meer bijzondere diersoorten leven.

Visit overloonzoo.nl

Key Findings

We analyzed Overloonzoo.nl page load time and found that the first response time was 1 sec and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

overloonzoo.nl performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

40/100

10%

LCP (Largest Contentful Paint)

Value9.2 s

1/100

25%

SI (Speed Index)

Value8.8 s

15/100

10%

TBT (Total Blocking Time)

Value1,100 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.179

68/100

15%

TTI (Time to Interactive)

Value19.0 s

3/100

10%

Network Requests Diagram

overloonzoo.nl

1034 ms

jquery.min.js

256 ms

FW_Search_Form.min.js

171 ms

style.css

276 ms

BxSlider.min.js

274 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 86% of them (36 requests) were addressed to the original Overloonzoo.nl, 10% (4 requests) were made to Google-analytics.com and 2% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Overloonzoo.nl.

Page Optimization Overview & Recommendations

Page size can be reduced by 143.4 kB (19%)

Content Size

746.4 kB

After Optimization

603.0 kB

In fact, the total size of Overloonzoo.nl main page is 746.4 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. 25% of websites need less resources to load. Images take 563.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 12.3 kB

  • Original 16.0 kB
  • After minification 15.7 kB
  • After compression 3.7 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 12.3 kB or 77% of the original size.

Image Optimization

-5%

Potential reduce by 29.3 kB

  • Original 563.6 kB
  • After minification 534.3 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. Overloon Zoo images are well optimized though.

JavaScript Optimization

-56%

Potential reduce by 77.1 kB

  • Original 136.6 kB
  • After minification 136.0 kB
  • After compression 59.5 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 77.1 kB or 56% of the original size.

CSS Optimization

-82%

Potential reduce by 24.7 kB

  • Original 30.2 kB
  • After minification 24.2 kB
  • After compression 5.5 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. Overloonzoo.nl needs all CSS files to be minified and compressed as it can save up to 24.7 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (32%)

Requests Now

41

After Optimization

28

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Overloon 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 8 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

overloonzoo.nl accessibility score

87

Accessibility Issues

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

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

overloonzoo.nl 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

overloonzoo.nl SEO score

92

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

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    NL

  • Language Claimed

    NL

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Overloonzoo.nl can be misinterpreted by Google and other search engines. Our service has detected that Dutch is used on the page, and it matches the claimed language. Our system also found out that Overloonzoo.nl 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 description is not detected on the main page of Overloon Zoo. 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: