How much carbon does a web page cost?
CO2Stats loads a page in a real browser, weighs everything it downloads and turns that into an estimate of the carbon each visit causes, using a published method.
Coming soon
The website carbon checker
The checker is being rebuilt. When it opens, enter the address of any page and it will show you:
- the page’s total transfer size, and how it splits between images, scripts, fonts, video, CSS and HTML
- its heaviest files and how many requests it makes
- an estimate of the grams of CO2e each visit causes, and a grade from A+ to F
- whether its host is verified as running on green energy
- specific changes that would make it lighter, each with its own modelled saving
Every result will say what was measured and when. Results are estimates, and will say so.