Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

nationalgallery.co.uk

The National Gallery Online Shop | National Gallery Shop

Page Load Speed

3.2 sec in total

First Response

320 ms

Resources Loaded

2 sec

Page Rendered

898 ms

nationalgallery.co.uk screenshot

About Website

Welcome to nationalgallery.co.uk homepage info - get ready to check National Gallery best content for United Kingdom right away, or after learning these important things about nationalgallery.co.uk

Find gifts inspired by our collection. From art books, art posters and custom prints. Every purchase supports the National Gallery. Shop online today.

Visit nationalgallery.co.uk

Key Findings

We analyzed Nationalgallery.co.uk page load time and found that the first response time was 320 ms and then it took 2.9 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

nationalgallery.co.uk performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

20/100

10%

LCP (Largest Contentful Paint)

Value15.3 s

0/100

25%

SI (Speed Index)

Value9.8 s

10/100

10%

TBT (Total Blocking Time)

Value3,890 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value23.1 s

1/100

10%

Network Requests Diagram

nationalgallery.co.uk

320 ms

shop.nationalgallery.org.uk

32 ms

calendar.css

9 ms

styles-m.css

14 ms

quickview.css

40 ms

Our browser made a total of 209 requests to load all elements on the main page. We found that 0% of them (1 request) were addressed to the original Nationalgallery.co.uk, 95% (198 requests) were made to Shop.nationalgallery.org.uk and 1% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (969 ms) relates to the external source Shop.nationalgallery.org.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 693.3 kB (32%)

Content Size

2.2 MB

After Optimization

1.5 MB

In fact, the total size of Nationalgallery.co.uk main page is 2.2 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 932.7 kB which makes up the majority of the site volume.

HTML Optimization

-89%

Potential reduce by 508.8 kB

  • Original 570.7 kB
  • After minification 478.8 kB
  • After compression 61.9 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. This page needs HTML code to be minified as it can gain 91.9 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 508.8 kB or 89% of the original size.

Image Optimization

-0%

Potential reduce by 129 B

  • Original 932.7 kB
  • After minification 932.6 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. National Gallery images are well optimized though.

JavaScript Optimization

-32%

Potential reduce by 170.5 kB

  • Original 537.0 kB
  • After minification 480.6 kB
  • After compression 366.4 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 170.5 kB or 32% of the original size.

CSS Optimization

-10%

Potential reduce by 13.9 kB

  • Original 142.6 kB
  • After minification 142.3 kB
  • After compression 128.7 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. Nationalgallery.co.uk has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 127 (64%)

Requests Now

200

After Optimization

73

The browser has sent 200 CSS, Javascripts, AJAX and image requests in order to completely render the main page of National Gallery. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 121 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

nationalgallery.co.uk accessibility score

98

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-hidden="true"] elements contain focusable descendents

Best Practices

nationalgallery.co.uk 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

nationalgallery.co.uk SEO score

92

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

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Nationalgallery.co.uk 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 Nationalgallery.co.uk 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 National Gallery. 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: