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Report Summary

  • 73

    Performance

    Renders faster than
    83% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

style.ons.gov.uk

Content style guide – Service manual – Office for National Statistics

Page Load Speed

2.9 sec in total

First Response

935 ms

Resources Loaded

1.8 sec

Page Rendered

130 ms

style.ons.gov.uk screenshot

About Website

Welcome to style.ons.gov.uk homepage info - get ready to check Style Ons best content for United Kingdom right away, or after learning these important things about style.ons.gov.uk

Learn about our house style, tone of voice and our spelling and grammar conventions.

Visit style.ons.gov.uk

Key Findings

We analyzed Style.ons.gov.uk page load time and found that the first response time was 935 ms and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

style.ons.gov.uk performance score

73

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

37/100

10%

LCP (Largest Contentful Paint)

Value3.8 s

55/100

25%

SI (Speed Index)

Value5.3 s

58/100

10%

TBT (Total Blocking Time)

Value250 ms

85/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.7 s

90/100

10%

Network Requests Diagram

style.ons.gov.uk

935 ms

wp-emoji-release.min.js

91 ms

style.css

253 ms

jquery.js

268 ms

jquery-migrate.min.js

176 ms

Our browser made a total of 19 requests to load all elements on the main page. We found that 79% of them (15 requests) were addressed to the original Style.ons.gov.uk, 11% (2 requests) were made to Google-analytics.com and 5% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (935 ms) belongs to the original domain Style.ons.gov.uk.

Page Optimization Overview & Recommendations

Page size can be reduced by 298.3 kB (73%)

Content Size

406.9 kB

After Optimization

108.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Style.ons.gov.uk main page is 406.9 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Javascripts take 207.5 kB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 31.3 kB

  • Original 40.3 kB
  • After minification 39.0 kB
  • After compression 9.0 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 31.3 kB or 78% of the original size.

Image Optimization

-43%

Potential reduce by 3.0 kB

  • Original 7.1 kB
  • After minification 4.0 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. Obviously, Style Ons needs image optimization as it can save up to 3.0 kB or 43% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-64%

Potential reduce by 133.2 kB

  • Original 207.5 kB
  • After minification 207.5 kB
  • After compression 74.3 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 133.2 kB or 64% of the original size.

CSS Optimization

-86%

Potential reduce by 130.7 kB

  • Original 152.0 kB
  • After minification 117.3 kB
  • After compression 21.3 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. Style.ons.gov.uk needs all CSS files to be minified and compressed as it can save up to 130.7 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 11 (65%)

Requests Now

17

After Optimization

6

  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Style Ons. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

style.ons.gov.uk

style.ons.gov.uk

935 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

91 ms

style.css

style.css

253 ms

jquery.js

jquery.js

268 ms

jquery-migrate.min.js

jquery-migrate.min.js

176 ms

third-party.min.js

third-party.min.js

183 ms

modernizr.min.js

modernizr.min.js

174 ms

jquery.flexslider.min.js

jquery.flexslider.min.js

182 ms

general.min.js

general.min.js

263 ms

shortcodes.css

shortcodes.css

263 ms

custom.css

custom.css

292 ms

css

css

25 ms

comment-reply.min.js

comment-reply.min.js

289 ms

woothemes.png

woothemes.png

90 ms

ogl-logo.png

ogl-logo.png

86 ms

icon_top.png

icon_top.png

112 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

328 ms

analytics.js

analytics.js

33 ms

collect

collect

25 ms

Accessibility Review

style.ons.gov.uk accessibility score

100

Accessibility Issues

Best Practices

style.ons.gov.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

style.ons.gov.uk SEO score

92

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

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 Style.ons.gov.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 Style.ons.gov.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

style.ons.gov.uk

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