CO₂FoxCO₂Fox: Your Open AI Carbon Assistant
Updated July 2025
CO₂Fox is a free, transparent, and accessible AI assistant that helps you estimate the carbon footprint of your everyday actions. Whether you're buying groceries, booking a flight, or attending a conference, CO₂Fox gives you a quick, understandable estimate of your emissions.
Everyday decisions have a climate impact. CO₂Fox helps you understand and reduce yours.
Powered by official data
CO₂Fox uses open emission factor databases such as the ADEME Base Carbone and GHG Protocol. All estimates are linked to transparent sources and documented assumptions.
How it works
- Describe your action (e.g. "Paris to Marseille by train")
- Optionally add a cost or quantity (e.g. "€60" or "5kg")
- Get a fast, documented estimate of associated emissions (in kgCO₂e)
Why CO₂Fox?
- Accessible: No login or expertise required
- Transparent: Every estimate links to its source and method
- Open: CO₂Fox is free to use and open for collaboration
- Educational: Understand the footprint of real-life actions
Use cases
- Learn the carbon cost of flying vs. taking the train
- Estimate the emissions from a product purchase
- Compare delivery options or transportation modes
- Raise awareness in classrooms, teams, or communities
The vision
CO₂Fox was created to make carbon data open, actionable, and trustworthy. In a world where greenwashing and opaque calculators are everywhere, we believe that everyone deserves a simple, scientific, and transparent way to understand their impact.