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carbonindependent.org screenshot

Report Summary

  • 97

    Performance

    Renders faster than
    94% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 80

    SEO

    Google-friendlier than
    42% of websites

carbonindependent.org

Carbon footprint calculator

Page Load Speed

2.3 sec in total

First Response

202 ms

Resources Loaded

1.6 sec

Page Rendered

477 ms

carbonindependent.org screenshot

About Website

Welcome to carbonindependent.org homepage info - get ready to check Carbon Independent best content for United Kingdom right away, or after learning these important things about carbonindependent.org

Get a rough estimate or an accurate calculation of your carbon dioxide and other emissions from electricity, gas, oil, car, bus, train, plane, food and miscellaneous spending

Visit carbonindependent.org

Key Findings

We analyzed Carbonindependent.org page load time and found that the first response time was 202 ms and then it took 2.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Performance Metrics

carbonindependent.org performance score

97

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

83/100

10%

LCP (Largest Contentful Paint)

Value2.0 s

97/100

25%

SI (Speed Index)

Value2.5 s

98/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value2.0 s

99/100

10%

Network Requests Diagram

carbonindependent.org

202 ms

carbonindependent.org

605 ms

screen2.css

196 ms

javascript2.js

284 ms

calculator.js

376 ms

Our browser made a total of 16 requests to load all elements on the main page. We found that all of those requests were addressed to Carbonindependent.org and no external sources were called. The less responsive or slowest element that took the longest time to load (605 ms) belongs to the original domain Carbonindependent.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 147.1 kB (43%)

Content Size

343.1 kB

After Optimization

195.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Carbonindependent.org main page is 343.1 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. 15% of websites need less resources to load. Images take 221.5 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 47.3 kB

  • Original 58.4 kB
  • After minification 53.6 kB
  • After compression 11.1 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 47.3 kB or 81% of the original size.

Image Optimization

-20%

Potential reduce by 44.7 kB

  • Original 221.5 kB
  • After minification 176.8 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, Carbon Independent needs image optimization as it can save up to 44.7 kB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-87%

Potential reduce by 20.1 kB

  • Original 23.2 kB
  • After minification 14.2 kB
  • After compression 3.1 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 20.1 kB or 87% of the original size.

CSS Optimization

-88%

Potential reduce by 35.0 kB

  • Original 40.0 kB
  • After minification 19.0 kB
  • After compression 5.0 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. Carbonindependent.org needs all CSS files to be minified and compressed as it can save up to 35.0 kB or 88% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

14

After Optimization

14

  • Images
  • JavaScript
  • CSS

The browser has sent 14 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Carbon Independent. According to our analytics all requests are already optimized.

Network Requests Diagram

carbonindependent.org

carbonindependent.org

202 ms

carbonindependent.org

carbonindependent.org

605 ms

screen2.css

screen2.css

196 ms

javascript2.js

javascript2.js

284 ms

calculator.js

calculator.js

376 ms

banner_lan.png

banner_lan.png

296 ms

logo.png

logo.png

282 ms

black_cross_32.gif

black_cross_32.gif

96 ms

co2_summary.png

co2_summary.png

196 ms

ele_icon.bmp

ele_icon.bmp

194 ms

gas_icon.bmp

gas_icon.bmp

284 ms

car_icon.bmp

car_icon.bmp

285 ms

bus_icon.bmp

bus_icon.bmp

287 ms

tra_icon.bmp

tra_icon.bmp

294 ms

pla_icon.bmp

pla_icon.bmp

378 ms

print2.css

print2.css

101 ms

Accessibility Review

carbonindependent.org accessibility score

59

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.

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Form elements do not have associated labels

Best Practices

carbonindependent.org best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

SEO Factors

carbonindependent.org SEO score

80

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

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

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Carbonindependent.org 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 Carbonindependent.org main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

carbonindependent.org

Open Graph description is not detected on the main page of Carbon Independent. 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: