Home - Green Web Foundation Skip to content Tools Overview and contribute Green web check Hosting directory Green web dataset CO2.js carbon.txt Grid-aware websites Insights Blog / news Green Web Fellowship Publications Library Newsletter Services Green hosting verification AI briefing Emissions workshop Fiscal sponsorship Services overview About About us Our team Talks & appearances Funding Jobs Contact Donate Provider portal Navigation Menu Navigation Menu Tools Overview and contribute Green web check Hosting directory Green web dataset CO2.js carbon.txt Grid-aware websites Insights Blog / news Green Web Fellowship Publications Library Newsletter Services Green hosting verification AI briefing Emissions workshop Fiscal sponsorship Services overview About About us Our team Talks & appearances Funding Jobs Contact Donate Provider portal Does your website run on green energy? The internet is the world's largest coal-powered machine. Check if your website runs on green energy — and help make the internet fossil-free. Check 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. Learn More Support the Mission 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. More about verification 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. Dataset CO2.js Estimate the carbon emissions of apps, website and software with our open source Javascript library. CO2.js Training We deliver training and workshop sessions to support organisations at any stage of their digital sustainability journey. Training State of the Fossil-Free Internet Our first annual report on the progress towards a fossil-free Internet by 2030. This years 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. Project overview 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. Past cohorts Green Screen Coalition Connecting digital rights and climate justice practitioners and funders. COALITION SUPPORTED BY Who else supports our mission 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 dont know how to include digital carbon emissions? Then come to our hands-on two-hour online workshop! LEARN MORE 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. LEARN MORE Blog Automating sustainability disclosures for .eco domains with carbon.txt3rd August 2026In this post, we look at how .eco domains have used carbon.txt to streamline the process of adding disclosures to organisational profiles. The Case for a Moratorium on Large Data Centers in Europe30th July 2026The European Commission says expanding AI infrastructure is essential to Europe’s technological sovereignty. Yet, it has not shown why: There is no solid evidence for… A July SCI for Web update defining a new standard for carbon measurement in web applications24th July 2026Over the last twelve months, weve been posting about our work leading on the development of SCI for Web, a new standard for measuring the… VIEW ALL 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. To the top Contact us Help and FAQ Send us a message Papaverweg 34 - Unit B100 1032 KJ Amsterdam The Netherlands Naunynstrasse 40 10999 Berlin Germany Green your website Switch your website to a verified green provider to get this badge. This website is hosted by Cloudflare and 34SP.com Newsletter Timely and actionable news about greening the web and a sustainable digital transition. More info Social media LinkedIn RSS All posts | Just CO2.js FAQ Privacy Policy Contact Contact us Help and FAQ Send us a message Papaverweg 34 - Unit B100 1032 KJ Amsterdam The Netherlands Naunynstrasse 40 10999 Berlin Germany Green your website Switch your website to a verified green provider to get this badge. This website is hosted by Cloudflare and 34SP.com Newsletter Timely and actionable news about greening the web and a sustainable digital transition. More info Social media LinkedIn RSS All posts | Just CO2.js FAQ Privacy Policy Contact