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Weigh your website.

Every page has a physical footprint — energy in data centers, networks, and your visitors' hands. Enter a URL and we'll weigh one page, estimate its CO2e, and measure how much of it is mechanically fixable.

Takes about half a minute — Google's Lighthouse actually loads your page to weigh it. We analyze the page you enter, not your whole site.

requesting Lighthouse run…

Report

What your page weighs

checking host registry…

Today

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transferred per first-time view
Requests
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Est. CO2e / view
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Mechanically optimized

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projected, after the fixes below
Weight saved
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Est. CO2e / view
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— A conservative floor, not a ceiling. These are only the savings a machine can already see — image formats, lazy loading, unused code, compression. A real redesign usually beats it.
Already light. Lighthouse found nothing mechanical worth flagging — genuinely rare, and worth bragging about. There's usually still room in design and content choices, but this page passes the byte audit.
Today: — / year Optimized: — / year Difference ≈ — driven
Disclosure 01Carbon estimates are proxy indicators built on global averages (Sustainable Web Design Model v4, global grid intensity) — trend tools, not meters.
Disclosure 02We analyze the single page you entered, as Lighthouse loads it fresh — back-end compute and return-visitor caching are outside the estimate.
Disclosure 03Excludes embodied carbon (hardware manufacturing). Savings figures are Lighthouse's own machine estimates, grouped conservatively to avoid double-counting.

Want this as a full report?

We'll send the complete breakdown — every resource, every fix, what it would take. No drip campaign, just the report.