Access wellcomelibrary.org. Wellcome Collection | A free museum and library exploring health and human experience

Report Summary

About Website

Click here to check amazing Wellcome Library content for United States. Otherwise, check out these important facts you probably never knew about wellcomelibrary.org

Visit our free museum and library in central London connecting science, medicine, life and art. Explore our exhibitions, live events, gallery tours and café. Fully accessible.

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name

value

score

weighting

FCP (First Contentful Paint)

Value5.8 s

4/100

10%

LCP (Largest Contentful Paint)

Value10.4 s

0/100

25%

SI (Speed Index)

Value6.5 s

38/100

10%

TBT (Total Blocking Time)

Value1,850 ms

9/100

30%

CLS (Cumulative Layout Shift)

Value0.043

99/100

15%

TTI (Time to Interactive)

Value10.9 s

21/100

10%

wellcomecollection.org

44 ms

gtm.js

68 ms

polyfills-c67a75d1b6f99dc8.js

95 ms

webpack-e653aa3faa3322e1.js

102 ms

framework-f29e48ae95cae5a3.js

176 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Wellcomelibrary.org, 38% (14 requests) were made to Images.prismic.io and 11% (4 requests) were made to I.wellcomecollection.org. The less responsive or slowest element that took the longest time to load (199 ms) relates to the external source Content.www.wellcomecollection.org.

Content Size

2.0 MB

After Optimization

1.9 MB

In fact, the total size of Wellcomelibrary.org main page is 2.0 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. 55% of websites need less resources to load. Images take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 158.3 kB

Original 202.3 kB
After minification 202.3 kB
After compression 44.0 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 158.3 kB or 78% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

Original 1.7 MB
After minification 1.7 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. Wellcome Library images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 12 B

Original 94.3 kB
After minification 94.3 kB
After compression 94.3 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.

Requests Now

After Optimization

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Wellcome Library. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and as a result speed up the page load time.

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

Search Engine Optimization Advices

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/).

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 Wellcomelibrary.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 Wellcomelibrary.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

wellcomelibrary.org

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Wellcome Collection | A free museum and library exploring health and human experience

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)