Carbon Karma / preview 1.1.0

Understand the weight of a page.

Inspect the page’s reported transfer sizes locally. Explore a carbon estimate using explicitly adjustable assumptions, rather than a measured emissions claim.

Firefox preview pending signing.Download Chrome preview

Self-distributed preview. Chrome requires unpacking; Firefox downloads are Mozilla-signed when available. No public store listing is claimed.

BUILT FOR YOUR BROWSER / BY TEampire

Local processingNo extension analytics

Your controlExplicit actions and readable results

Visible resultsReview what the tool changes

What stays with you

Useful access.
Honest privacy.

Page addresses and resource names are not saved or transmitted. Only your estimate factors are saved locally.

Read this tool’s privacy policy →

What to expect

Inspect the page’s reported transfer sizes locally. Explore a carbon estimate using explicitly adjustable assumptions, rather than a measured emissions claim.

This is a preview build. Some browser or website changes may affect features. Send feedback to dev@teampire.uk; include steps to reproduce and remove private information from screenshots.

Getting started

Install the preview.

Chrome / Edge

Download the Chrome ZIP and extract it. Open chrome://extensions or edge://extensions, enable Developer mode, choose Load unpacked, then select the extracted folder containing manifest.json.

Firefox

Download the signed XPI when available. Open about:addons → the gear menu → Install Add-on From File. Choose the XPI and review the requested permissions.

Stay in control

Pin the extension to your toolbar and open it. Previews have no automatic update feed yet; install a newer signed build manually. Existing saved settings remain tied to the extension’s ID.