We work towards a fossil-free internet by 2030
The Green Web Foundation is an independent non-profit that tracks how much of the internet runs on green energy. Manage the environmental impact of your digital products. Apply best practices in digital sustainability. Advocate for a more sustainable and just internet.
Get Verified
Are you a hosting provider using green energy? Get verified for free. Your services will be listed in our Green Web Dataset — accessed millions of times a day.
WHAT WE DO
Dataset
Check if a website runs on 100% green energy. View public evidence of claims. Download our open dataset or use our API.
CO2.js
Estimate the carbon emissions of apps, website and software with our open source Javascript library.
Training
We deliver training and workshop sessions to support organisations at any stage of their digital sustainability journey.
State of the Fossil-Free Internet
Our first annual report on the progress towards a fossil-free Internet by 2030.
This year’s focus: Dirty Data Centres
Carbon.txt
A single place on any domain – /carbon.txt – to discover and use public, machine-readable, sustainability data relating to that company.
Branch Magazine
A carbon-aware magazine written by and for people who dream of a sustainable and just internet for all. Recipient of the Ars Electronica Award for Digital Humanity.
Green Screen Coalition
Connecting digital rights and climate justice practitioners and funders.
SUPPORTED BY
ESTIMATING DIGITAL CARBON EMISSIONS WORKSHOP
Are you a developer and want to learn more about the tools you can use for digital carbon estimation? Do you work on sustainability reporting but don’t know how to include digital carbon emissions? Then come to our hands-on two-hour online workshop!
ENVIRONMENTAL IMPACTS OF AI BRIEFING
Do you want to understand the environmental impacts of artificial intelligence, and what can be done to manage the harms? This 90-minute online briefing explains the key environmental issues of AI to people with little time in their diaries and a need to make better informed decisions.
Blog
- Launching the first State of the Fossil-Free Internet Report today
Green Web Foundation’s first State of the Fossil-Free Internet report documents a transparency gap at the heart of technology companies’ green energy claims. 29 April… - What do cloud service companies disclose? Using the Cloud Region Metadata dataset to track transparency about fossil fuelsIn our recent report, State of the Fossil-Free Internet 2026, we show a transparency score based on four questions about company disclosures of how data…
- AI model cards in carbon.txt and an AI Sustainability DirectoryAs part of a recent workshop we held at the Green IO Singapore conference, we made updates to the carbon.txt syntax to allow AI model…
Get involveD
Our work is open-source by default and contributions and participation is welcome across all of our projects.
For our technical work, all our GitHub repos are open for comments and issues. Start on our tools page to navigate to the relevant repo.
For any of our other work, if you are interested in collaborating or contributing then drop us a line through our support form.
We also welcome financial contributions to help keep our work impactful and cutting edge. Find out more about how to donate as an commercial organisation, a grantmaker or an individual on our donate page.