Tools & Wizards About Us
certasenergy.co.uk screenshot

Report Summary

  • 35

    Performance

    Renders faster than
    55% of other websites

  • 85

    Accessibility

    Visual factors better than
    that of 58% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 96

    SEO

    Google-friendlier than
    90% of websites

certasenergy.co.uk

Oil Suppliers & Fuel Management Solutions - Certas Energy

Page Load Speed

16.2 sec in total

First Response

643 ms

Resources Loaded

15.2 sec

Page Rendered

272 ms

certasenergy.co.uk screenshot

About Website

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

Certas Energy is the largest distributor of fuel and lubricants in the UK. Visit our website to read more about the extensive list of products and services we offer.

Visit certasenergy.co.uk

Key Findings

We analyzed Certasenergy.co.uk page load time and found that the first response time was 643 ms and then it took 15.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

certasenergy.co.uk performance score

35

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value5.6 s

18/100

25%

SI (Speed Index)

Value3.9 s

82/100

10%

TBT (Total Blocking Time)

Value3,450 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.012

100/100

15%

TTI (Time to Interactive)

Value28.6 s

0/100

10%

Network Requests Diagram

certasenergy.co.uk

643 ms

www.certasenergy.co.uk

1306 ms

style.css

283 ms

jquery-1.9.1.min.js

4 ms

jquery.flexslider.js

306 ms

Our browser made a total of 109 requests to load all elements on the main page. We found that 73% of them (80 requests) were addressed to the original Certasenergy.co.uk, 4% (4 requests) were made to W.sharethis.com and 2% (2 requests) were made to T.wowanalytics.co.uk. The less responsive or slowest element that took the longest time to load (12.3 sec) relates to the external source Tags.bluekai.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 723.3 kB (47%)

Content Size

1.5 MB

After Optimization

807.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Certasenergy.co.uk main page is 1.5 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. 50% of websites need less resources to load. Images take 729.9 kB which makes up the majority of the site volume.

HTML Optimization

-92%

Potential reduce by 108.7 kB

  • Original 117.7 kB
  • After minification 106.8 kB
  • After compression 9.1 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. 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 108.7 kB or 92% of the original size.

Image Optimization

-15%

Potential reduce by 107.1 kB

  • Original 729.9 kB
  • After minification 622.9 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, Certas Energy needs image optimization as it can save up to 107.1 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-73%

Potential reduce by 424.4 kB

  • Original 583.3 kB
  • After minification 540.6 kB
  • After compression 158.8 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 424.4 kB or 73% of the original size.

CSS Optimization

-83%

Potential reduce by 83.2 kB

  • Original 99.7 kB
  • After minification 88.3 kB
  • After compression 16.5 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. Certasenergy.co.uk needs all CSS files to be minified and compressed as it can save up to 83.2 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 41 (40%)

Requests Now

102

After Optimization

61

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 102 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Certas Energy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

certasenergy.co.uk

certasenergy.co.uk

643 ms

www.certasenergy.co.uk

www.certasenergy.co.uk

1306 ms

style.css

style.css

283 ms

jquery-1.9.1.min.js

jquery-1.9.1.min.js

4 ms

jquery.flexslider.js

jquery.flexslider.js

306 ms

jquery.cycle2.min.js

jquery.cycle2.min.js

307 ms

jquery.cycle2.carousel.js

jquery.cycle2.carousel.js

199 ms

jquery.validate.js

jquery.validate.js

208 ms

jquery.fancybox.js

jquery.fancybox.js

397 ms

jquery.fancybox-media.js

jquery.fancybox-media.js

311 ms

clicky_cookies.js

clicky_cookies.js

312 ms

main.js

main.js

382 ms

buttons.js

buttons.js

11 ms

pagenavi-css.css

pagenavi-css.css

423 ms

wp-embed.min.js

wp-embed.min.js

356 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

252 ms

tracker.js

tracker.js

256 ms

w.js

w.js

245 ms

logo.png

logo.png

232 ms

search-button.png

search-button.png

234 ms

flowerpattern.png

flowerpattern.png

231 ms

oilrig.jpg

oilrig.jpg

235 ms

overlay2.png

overlay2.png

234 ms

flowercolour.png

flowercolour.png

235 ms

slider-bg.png

slider-bg.png

236 ms

certas_yourfuelpartner.jpg

certas_yourfuelpartner.jpg

608 ms

truck.png

truck.png

236 ms

map.png

map.png

461 ms

domestic.png

domestic.png

463 ms

retail.png

retail.png

460 ms

agricultural.png

agricultural.png

461 ms

ship.png

ship.png

463 ms

aviation.png

aviation.png

465 ms

icon-fuelcards.png

icon-fuelcards.png

465 ms

bg_direction_nav.png

bg_direction_nav.png

466 ms

home-box.png

home-box.png

468 ms

findoutmore.png

findoutmore.png

468 ms

tv-head.png

tv-head.png

484 ms

video-img.jpg

video-img.jpg

705 ms

certas-tv.png

certas-tv.png

509 ms

findoutmore2.png

findoutmore2.png

511 ms

our_partners2.jpg

our_partners2.jpg

714 ms

homeboxBlue.png

homeboxBlue.png

575 ms

csr.jpg

csr.jpg

787 ms

homeboxGreen.png

homeboxGreen.png

620 ms

careers.jpg

careers.jpg

863 ms

homeboxOrange.png

homeboxOrange.png

699 ms

carousel-bg.png

carousel-bg.png

721 ms

Vectis_Oils1-184x50.png

Vectis_Oils1-184x50.png

797 ms

TownCountry1-184x32.png

TownCountry1-184x32.png

803 ms

Team_Flitwick-184x41.png

Team_Flitwick-184x41.png

814 ms

Southern_Counties_Fuels-184x28.png

Southern_Counties_Fuels-184x28.png

820 ms

analytics.js

analytics.js

182 ms

getAllAppDefault.esi

getAllAppDefault.esi

241 ms

Severn_Fuels-147x100.png

Severn_Fuels-147x100.png

660 ms

Scottish_Fuels-110x100.png

Scottish_Fuels-110x100.png

679 ms

Owen_Fuels-184x20.png

Owen_Fuels-184x20.png

683 ms

OJ_Williams-184x54.png

OJ_Williams-184x54.png

698 ms

Lyn_Valley_Fuels-184x42.png

Lyn_Valley_Fuels-184x42.png

695 ms

Jackson_Fuels-184x22.png

Jackson_Fuels-184x22.png

728 ms

Grampian_Fuels-184x43.png

Grampian_Fuels-184x43.png

757 ms

GE_Stevens-184x20.png

GE_Stevens-184x20.png

774 ms

F_PeartCo1-118x100.png

F_PeartCo1-118x100.png

785 ms

Emo2-136x100.png

Emo2-136x100.png

794 ms

clickstream.min.js

clickstream.min.js

213 ms

collect

collect

199 ms

186 ms

helveticaneueltstd-roman-webfont.woff

helveticaneueltstd-roman-webfont.woff

576 ms

helveticaneueltstd-bd-webfont.woff

helveticaneueltstd-bd-webfont.woff

597 ms

helveticaneueltstd-lt-webfont.woff

helveticaneueltstd-lt-webfont.woff

632 ms

evf-1-161x100.png

evf-1-161x100.png

656 ms

Channel_Island_Fuels-105x100.png

Channel_Island_Fuels-105x100.png

665 ms

Central_Fuel_Oils.png

Central_Fuel_Oils.png

676 ms

Cambria-184x60.png

Cambria-184x60.png

678 ms

Caledonian_Oil_Logo-184x52.jpg

Caledonian_Oil_Logo-184x52.jpg

693 ms

Butler_Fuels-184x26.png

Butler_Fuels-184x26.png

727 ms

getSegment.php

getSegment.php

26 ms

checkOAuth.esi

checkOAuth.esi

6 ms

Brogan_Fuels-184x16.png

Brogan_Fuels-184x16.png

738 ms

storage.luckyorange.net

storage.luckyorange.net

71 ms

Bayford_Oil-184x37.png

Bayford_Oil-184x37.png

748 ms

t.dhj

t.dhj

60 ms

Baxter_Johnston_Oils-184x55.png

Baxter_Johnston_Oils-184x55.png

747 ms

BatesHunt_Petroleum-184x9.png

BatesHunt_Petroleum-184x9.png

747 ms

settings.luckyorange.net

settings.luckyorange.net

18 ms

t.dhj

t.dhj

35 ms

Amoil_Supplies-184x59.png

Amoil_Supplies-184x59.png

686 ms

cm

cm

6 ms

x35248

x35248

102 ms

Advance-Fuels-Logo-184x63.jpg

Advance-Fuels-Logo-184x63.jpg

685 ms

s-3271.xgi

s-3271.xgi

10 ms

hbpix

hbpix

40 ms

news-ticker.png

news-ticker.png

699 ms

7 ms

pixel

pixel

16 ms

xrefid.xgi

xrefid.xgi

5 ms

8 ms

pixel

pixel

16 ms

2981

2981

12270 ms

arrow-single.png

arrow-single.png

645 ms

patt-left.png

patt-left.png

661 ms

patt-right.png

patt-right.png

654 ms

footer-bar.png

footer-bar.png

641 ms

clicky_cookies.png

clicky_cookies.png

598 ms

print.css

print.css

117 ms

index.2d85e55d89f85ae69e4f2ca5ab9438b7.html

index.2d85e55d89f85ae69e4f2ca5ab9438b7.html

19 ms

buttons.ab966a004186897711de4a5ed256c924.css

buttons.ab966a004186897711de4a5ed256c924.css

10 ms

stcommon.2b05accc08f1ee42fe1983647ab923ea.js

stcommon.2b05accc08f1ee42fe1983647ab923ea.js

32 ms

st.1188278743c14064d5e8ae56c8ada29c.js

st.1188278743c14064d5e8ae56c8ada29c.js

11 ms

Accessibility Review

certasenergy.co.uk accessibility score

85

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.

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 IDs are not unique

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

Links do not have a discernible name

Best Practices

certasenergy.co.uk best practices score

92

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

Page has valid source maps

SEO Factors

certasenergy.co.uk SEO score

96

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

High

Tap targets are not sized appropriately

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 Certasenergy.co.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 Certasenergy.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

certasenergy.co.uk

Open Graph description is not detected on the main page of Certas Energy. 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: