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    blurple labPAGE-WEIGHT · FREE TOOL

    Every byte becomes electricity.

    Weigh your page, see its CO₂ per view on the open CO2.js model, and wear the number as an embeddable badge. Lighter pages are faster, cheaper and kinder — to visitors and to the grid.

    no signup · nothing stored · open methodology

    WEIGH A PAGE
    01we fetch your page and sum every byte it transfers
    02CO2.js converts bytes to grams — same model as websitecarbon
    03you get a grade and a badge that keeps you honest
    AN HONEST NOTE

    The model is open. So are its limits.

    We use CO2.js, the open model maintained by the Green Web Foundation — the same maths behind most carbon calculators. It estimates; it doesn't meter your data center. The number is honest enough to compare, track and improve. That's what it's for.

    →The median page weighs ~2.5 MB. Ours weighs under 1.
    →Images are ~half of most pages' weight — and the easiest half to fix.
    →The badge re-weighs your page monthly. No gaming the number.
    →Low-impact design is part of our B Corp practice: Sustainability →