Understand the environmental impact of your internet usage with real-time CO₂ tracking
Automatically measures data transfer on every page load using the Performance API
Uses industry-standard Sustainable Web Design Model v4 from The Green Web Foundation
Relatable comparisons like driving, streaming, and charging devices to understand your impact
Track which websites contribute most to your carbon footprint with detailed analytics
Your data persists across browser sessions, giving you long-term tracking insights
Less than 50ms performance overhead per page load - you won't even notice it's there
Download and load the extension in Chrome, Edge, Brave, or Firefox
The extension silently measures data transfer as you visit websites
Click the extension icon to see your total emissions and per-site breakdown
Use the insights to reduce your digital carbon footprint
All data stays completely local on your device. No analytics, no telemetry, no external network requests. Your browsing history never leaves your computer.
Type-safe, component-based UI for the extension popup
Modern extension platform with service workers for background processing
Carbon calculations powered by The Green Web Foundation's industry-standard library
Optimized build tooling with hot module replacement for development
This extension is currently in beta testing. Download and install it manually to start tracking your carbon footprint.
Chrome Web Store version coming soon
chrome://extensions/ in your browserdist folder