Skip to content

Tools

All of our tools are open source and free to use. Please attribute us, and we welcome you tell us how you used them and what you’d like to see improved. To keep everything up-to-date and available to all, please consider making a donation and supporting a fossil-free internet.

Want to know how other organisations found green alternatives and managed their carbon emissions? Check out our case studies.

Our tools can help you

Check if a website is running on green energy

Find verified green hosting providers

Build carbon metrics into your own digital services

Disclose how your services are powered in an open, machine-readable way

Open Source and Open Data

All our tools are published under a Creative Commons ShareAlike Attribution License (CC BY-SA 4.0) unless otherwise noted. Check out our developer documentation and open source repositories on Github.

Check if a website is running on green energy

Green Web Check

Find out whether a website is hosted by a verified green provider.

Green Web Check form and successful green result screenshot

Green Web Dataset API

Integrate and automate real-time checks against the Green Web Dataset.

Green Web Browser Extension

Browse the internet and see in real-time if a website runs on green energy.

Find verified green hosting providers

Green Web Check - green result screenshot

Green Web Directory

Quickly find verified green hosting providers in a curated list. Our new Directory is in beta.

Build carbon metrics into your own digital services

CO2.js

Estimate the emissions related to your use of apps, websites and software with the help of this JavaScript library.

IP to CO2 Intensity API

Check the carbon intensity of an IP address based on its real-world location.

Grid Intensity CLI

Surface, monitor, and understand the carbon intensity of the code you run.

Disclose how your services are powered in an open, machine-readable way

Carbon.txt homepage screenshot

Carbon.txt

Show that a website runs on green energy in a simple, machine-readable way. Find out more about this pilot.