FAST | CLEAN | SECURE | SEEN™
A clearer view of
your page’s carbon.
Measure the data a page transfers. Explore its estimated carbon impact. Start with one page.
Scan a website page
A fresh browser visit · Desktop viewport · Bounded page load
The final page hostname is shared with the Green Web Foundation to check hosting evidence. No page path or query is sent
YOUR PAGE’S CARBON SNAPSHOT
Page:
Your page result
- Estimated emissions per page view
- g CO₂e
- Page data transferred
- MB
- Completed requests
How this result is calculated
What affected this scan
Emissions are estimated from observed encoded response transfer using Sustainable Web Design Model v4 and CO2.js. Page data includes response headers and received download bytes, including interrupted responses where observed. Uploads and TLS overhead are excluded. This protocol differs from the earlier completed-body-only implementation; compare results within the same scanner version.
A complete scan means our bounded observation finished. It does not include every possible interaction, consent choice or later download. This is not a whole-website footprint or a measurement of electricity consumption.
The A+–F grade uses the published Digital Carbon Ratings. Thresholds in g CO₂e: A+ ≤0.040; A ≤0.079; B ≤0.145; C ≤0.209; D ≤0.278; E ≤0.359; F above 0.359. We compare unrounded estimates. The underlying benchmark uses a June 2023 dataset; we make no current global percentile claim.
Small pages. Meaningful information.
Page weight is one useful signal. Results include the measurement conditions and limitations, so you can understand what was captured and compare future scans responsibly.