Tools & Wizards About Us
sja.org.uk screenshot

Report Summary

  • 30

    Performance

    Renders faster than
    49% of other websites

  • 63

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

sja.org.uk

First Aid Courses, Advice & Volunteering | St John Ambulance

Page Load Speed

3 sec in total

First Response

245 ms

Resources Loaded

1.6 sec

Page Rendered

1.2 sec

sja.org.uk screenshot

About Website

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

As the nation's leading first aid charity, St John Ambulance offers training courses, advice, volunteering opportunities, event support, products and more.

Visit sja.org.uk

Key Findings

We analyzed Sja.org.uk page load time and found that the first response time was 245 ms and then it took 2.8 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

sja.org.uk performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.9 s

26/100

10%

LCP (Largest Contentful Paint)

Value10.5 s

0/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value1,110 ms

23/100

30%

CLS (Cumulative Layout Shift)

Value0.02

100/100

15%

TTI (Time to Interactive)

Value11.3 s

19/100

10%

Network Requests Diagram

www.sja.org.uk

245 ms

www.sja.org.uk

206 ms

41e39d15-caad-48c5-9d94-fb2b1961dfc1.css

34 ms

OtAutoBlock.js

83 ms

otSDKStub.js

106 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 87% of them (34 requests) were addressed to the original Sja.org.uk, 8% (3 requests) were made to Cookie-cdn.cookiepro.com and 3% (1 request) were made to Widget.trustpilot.com. The less responsive or slowest element that took the longest time to load (712 ms) belongs to the original domain Sja.org.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 135.1 kB (3%)

Content Size

4.5 MB

After Optimization

4.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sja.org.uk main page is 4.5 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. Only a small number of websites need less resources to load. Images take 4.3 MB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 77.5 kB

  • Original 94.5 kB
  • After minification 74.5 kB
  • After compression 17.1 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 20.0 kB, which is 21% 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 77.5 kB or 82% of the original size.

Image Optimization

-1%

Potential reduce by 56.8 kB

  • Original 4.3 MB
  • After minification 4.3 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. Sja images are well optimized though.

JavaScript Optimization

-2%

Potential reduce by 533 B

  • Original 22.3 kB
  • After minification 22.3 kB
  • After compression 21.8 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. This website has mostly compressed JavaScripts.

CSS Optimization

-49%

Potential reduce by 269 B

  • Original 549 B
  • After minification 549 B
  • After compression 280 B

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. Sja.org.uk needs all CSS files to be minified and compressed as it can save up to 269 B or 49% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (36%)

Requests Now

33

After Optimization

21

  • Images
  • JavaScript
  • CSS

The browser has sent 33 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sja. 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 as a result speed up the page load time.

Network Requests Diagram

www.sja.org.uk

www.sja.org.uk

245 ms

www.sja.org.uk

www.sja.org.uk

206 ms

41e39d15-caad-48c5-9d94-fb2b1961dfc1.css

41e39d15-caad-48c5-9d94-fb2b1961dfc1.css

34 ms

OtAutoBlock.js

OtAutoBlock.js

83 ms

otSDKStub.js

otSDKStub.js

106 ms

jquery.js

jquery.js

59 ms

tp.widget.bootstrap.min.js

tp.widget.bootstrap.min.js

66 ms

homepage.css

homepage.css

62 ms

homepage.js

homepage.js

195 ms

find.js

find.js

102 ms

11fa2619-6699-4f81-84a5-e8c4c89d2653.json

11fa2619-6699-4f81-84a5-e8c4c89d2653.json

123 ms

search--black-green.svg

search--black-green.svg

59 ms

search--black.svg

search--black.svg

56 ms

sja_logo_correct_sized1.png

sja_logo_correct_sized1.png

58 ms

2024-all-volunteer-image.png

2024-all-volunteer-image.png

152 ms

circle-pause-regular.svg

circle-pause-regular.svg

110 ms

Chevrons.svg

Chevrons.svg

121 ms

Chevrons_animation.png

Chevrons_animation.png

108 ms

cpr-hands_green.png

cpr-hands_green.png

108 ms

first-aid_green.png

first-aid_green.png

403 ms

green_pound-sign.png

green_pound-sign.png

112 ms

green_queuing-2.png

green_queuing-2.png

111 ms

green_running-shoes.png

green_running-shoes.png

146 ms

richard-mararton-2024.png

richard-mararton-2024.png

271 ms

anne-marie--george-parkinson_001-1.jpg

anne-marie--george-parkinson_001-1.jpg

157 ms

Chevrons-hero-image-block.svg

Chevrons-hero-image-block.svg

178 ms

LongArrow.svg

LongArrow.svg

152 ms

restart-a-heart-tower-wharf_11.jpg

restart-a-heart-tower-wharf_11.jpg

227 ms

bar.png

bar.png

170 ms

2024-marathon.jpg

2024-marathon.jpg

227 ms

block_headline.svg

block_headline.svg

227 ms

close.svg

close.svg

229 ms

social-sprite-sja.png

social-sprite-sja.png

231 ms

close--white.svg

close--white.svg

230 ms

WhitneyBook_normal_normal.woff

WhitneyBook_normal_normal.woff

228 ms

WhitneySemibold_normal_normal.woff

WhitneySemibold_normal_normal.woff

362 ms

WhitneyBold_normal_normal.woff

WhitneyBold_normal_normal.woff

410 ms

WhitneyBlack_normal_normal.woff

WhitneyBlack_normal_normal.woff

712 ms

shoppingcart--white.svg

shoppingcart--white.svg

262 ms

Accessibility Review

sja.org.uk accessibility score

63

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

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

High

[role] values are not valid

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

sja.org.uk best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

sja.org.uk SEO score

77

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

Image elements do not have [alt] attributes

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

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 Sja.org.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 Sja.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

sja.org.uk

Open Graph data is detected on the main page of Sja. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: