Measure the ecological impact of any website via the Website Carbon API.
The internet consumes about 4% of global electricity. Every page load generates CO₂. Understanding carbon footprint is the first step toward building a greener and faster website.
Carbon emission estimation based on page size and data center energy consumption model.
Hosting verification through The Green Web Foundation database.
Comparison with the median website and sustainability rating.
Every website visit consumes energy — in data centres, networks, and end-user devices. This energy produces CO₂ emissions. The carbon footprint depends on page weight, hosting energy source, and visitor volume. Lighter pages, efficient code, and green hosting providers reduce environmental impact. Grades range from A+ (cleanest) to F (heaviest footprint).
The volume of data transferred when loading a page is calculated and multiplied by the average CO₂ emission factor of the power grid. Factors include: page size, green hosting status, and number of views.
Key factors: total page weight (HTML, CSS, JS, images, fonts), CDN usage, green hosting (renewable energy), and client-side caching.
Green hosting is a hosting provider that uses renewable energy sources (solar, wind) or purchases carbon offset credits. Verified through The Green Web Foundation database.
Optimize images (WebP/AVIF), minify CSS/JS, use a CDN, enable caching, choose green hosting, and remove unused scripts and fonts.