Tools & Wizards About Us
zooniverse.org screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 85

    Best Practices

    More advanced features
    available than in
    81% of websites

  • 88

    SEO

    Google-friendlier than
    66% of websites

zooniverse.org

Page Load Speed

825 ms in total

First Response

14 ms

Resources Loaded

691 ms

Page Rendered

120 ms

zooniverse.org screenshot

About Website

Visit zooniverse.org now to see the best up-to-date Zooniverse content for India and also check out these interesting facts you probably never knew about zooniverse.org

Visit zooniverse.org

Key Findings

We analyzed Zooniverse.org page load time and found that the first response time was 14 ms and then it took 811 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

zooniverse.org performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value13.5 s

0/100

10%

LCP (Largest Contentful Paint)

Value19.8 s

0/100

25%

SI (Speed Index)

Value13.5 s

2/100

10%

TBT (Total Blocking Time)

Value1,510 ms

14/100

30%

CLS (Cumulative Layout Shift)

Value0.078

95/100

15%

TTI (Time to Interactive)

Value19.1 s

3/100

10%

Network Requests Diagram

zooniverse.org

14 ms

www.zooniverse.org

119 ms

font-awesome.min.css

48 ms

css

78 ms

css

94 ms

Our browser made a total of 14 requests to load all elements on the main page. We found that 50% of them (7 requests) were addressed to the original Zooniverse.org, 14% (2 requests) were made to Fonts.googleapis.com and 14% (2 requests) were made to Cdn.polyfill.io. The less responsive or slowest element that took the longest time to load (129 ms) belongs to the original domain Zooniverse.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.7 MB (73%)

Content Size

2.4 MB

After Optimization

645.3 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Zooniverse.org main page is 2.4 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. 15% of websites need less resources to load. Javascripts take 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-66%

Potential reduce by 7.6 kB

  • Original 11.5 kB
  • After minification 10.9 kB
  • After compression 3.9 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 7.6 kB or 66% of the original size.

JavaScript Optimization

-72%

Potential reduce by 1.6 MB

  • Original 2.2 MB
  • After minification 2.2 MB
  • After compression 615.2 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 1.6 MB or 72% of the original size.

CSS Optimization

-84%

Potential reduce by 140.9 kB

  • Original 167.2 kB
  • After minification 166.1 kB
  • After compression 26.3 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. Zooniverse.org needs all CSS files to be minified and compressed as it can save up to 140.9 kB or 84% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (82%)

Requests Now

11

After Optimization

2

  • JavaScript
  • CSS

The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zooniverse. 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 from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

zooniverse.org

zooniverse.org

14 ms

www.zooniverse.org

www.zooniverse.org

119 ms

font-awesome.min.css

font-awesome.min.css

48 ms

css

css

78 ms

css

css

94 ms

main.f8d4a6abc5e5471c50c6f6b001bf6162.css

main.f8d4a6abc5e5471c50c6f6b001bf6162.css

29 ms

polyfill.min.js

polyfill.min.js

105 ms

jsPlumb.min.js

jsPlumb.min.js

56 ms

vendor.725151a6ea4073404a0b64953e91ac06.js

vendor.725151a6ea4073404a0b64953e91ac06.js

77 ms

main.5ecfeb8ff3a75ad0faeef4990365748d.js

main.5ecfeb8ff3a75ad0faeef4990365748d.js

89 ms

gtm.js

gtm.js

82 ms

polyfill.min.js

polyfill.min.js

92 ms

fallback-polyfills.js

fallback-polyfills.js

129 ms

analytics.js

analytics.js

68 ms

Accessibility Review

zooniverse.org accessibility score

92

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

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Links do not have a discernible name

Best Practices

zooniverse.org best practices score

85

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

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

zooniverse.org SEO score

88

Search Engine Optimization Advices

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

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Zooniverse.org can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Zooniverse.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

zooniverse.org

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