Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 96% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    65% of websites

  • 79

    SEO

    Google-friendlier than
    48% of websites

booktrust.org.uk

BookTrust: Getting children reading | BookTrust

Page Load Speed

5.2 sec in total

First Response

358 ms

Resources Loaded

4.5 sec

Page Rendered

305 ms

booktrust.org.uk screenshot

About Website

Visit booktrust.org.uk now to see the best up-to-date Book Trust content for United Kingdom and also check out these interesting facts you probably never knew about booktrust.org.uk

BookTrust is the UK’s largest children’s reading charity, dedicated to getting children reading. Each year we reach 3.4 million children across the UK with books and support.

Visit booktrust.org.uk

Key Findings

We analyzed Booktrust.org.uk page load time and found that the first response time was 358 ms and then it took 4.8 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

booktrust.org.uk performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

61/100

10%

LCP (Largest Contentful Paint)

Value7.7 s

3/100

25%

SI (Speed Index)

Value6.1 s

45/100

10%

TBT (Total Blocking Time)

Value470 ms

61/100

30%

CLS (Cumulative Layout Shift)

Value0.046

99/100

15%

TTI (Time to Interactive)

Value7.3 s

50/100

10%

Network Requests Diagram

booktrust.org.uk

358 ms

www.booktrust.org.uk

613 ms

archimedes-frontend-core.css

164 ms

archimedes-frontend-modules.css

177 ms

jquery.archimedes-frontend-core-plugins-0.1.css

180 ms

Our browser made a total of 132 requests to load all elements on the main page. We found that 70% of them (92 requests) were addressed to the original Booktrust.org.uk, 14% (18 requests) were made to Res.cloudinary.com and 10% (13 requests) were made to Fileserver.booktrust.org.uk. The less responsive or slowest element that took the longest time to load (2.4 sec) relates to the external source Fileserver.booktrust.org.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 2.0 MB (62%)

Content Size

3.2 MB

After Optimization

1.2 MB

In fact, the total size of Booktrust.org.uk main page is 3.2 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. 70% of websites need less resources to load. Javascripts take 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 125.2 kB

  • Original 150.6 kB
  • After minification 113.3 kB
  • After compression 25.4 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 37.2 kB, which is 25% 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 125.2 kB or 83% of the original size.

Image Optimization

-6%

Potential reduce by 52.0 kB

  • Original 867.4 kB
  • After minification 815.5 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. Book Trust images are well optimized though.

JavaScript Optimization

-80%

Potential reduce by 1.3 MB

  • Original 1.6 MB
  • After minification 1.2 MB
  • After compression 312.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 1.3 MB or 80% of the original size.

CSS Optimization

-89%

Potential reduce by 574.4 kB

  • Original 648.3 kB
  • After minification 390.8 kB
  • After compression 73.9 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. Booktrust.org.uk needs all CSS files to be minified and compressed as it can save up to 574.4 kB or 89% of the original size.

Requests Breakdown

Number of requests can be reduced by 82 (66%)

Requests Now

124

After Optimization

42

The browser has sent 124 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Book Trust. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 38 to 1 for JavaScripts and from 29 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

booktrust.org.uk accessibility score

98

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.

Best Practices

booktrust.org.uk best practices score

83

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

Page has valid source maps

SEO Factors

booktrust.org.uk SEO score

79

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

High

Document doesn't have a valid hreflang

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Booktrust.org.uk can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Booktrust.org.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 data is detected on the main page of Book Trust. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: