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Prelumen Analytics

Scope 3 carbon estimates. Page by page.

Detailed digital emissions estimates per site and page, ready for reporting — with Quick Offset if you want to act today.

Is this your website?
  • Break emissions down into data centre, network and end-user device
  • Rank your pages by footprint and start with the worst
  • Take the figures into a report, or offset them directly

Estimate a page in detail

Enter a URL for a page-level emissions estimate with Lighthouse data and green-hosting status behind it.

PageSpeed Insights data

Calls the Google PageSpeed Insights v5 API for the page and uses its Lighthouse audit data — lab metrics, opportunities and diagnostics.

Green hosting lookup

Queries the Green Web Foundation for the host, so renewable-powered infrastructure is reflected in the estimate.

Site rollup

Page measurements feed the carbon dashboard, which weights them by traffic and ranks your pages by footprint.

Quick Offset

Turn a measured footprint into an offset purchase from the result, if you decide to compensate.

What makes this Scope 3?
The estimate counts emissions caused by someone else running your page: data centre energy, network transfer and the visitor’s device. Those sit in your value chain, not on your own meter.
What happens if PageSpeed Insights is unavailable?
The check falls back to fetching the page and its assets itself. You still get an emissions estimate, but the Lighthouse panel — score, lab metrics, opportunities, diagnostics — is missing from the result.
Does one check cover my whole site?
A run measures one URL. Site-level figures build up from the pages already known to your account and are shown on the carbon dashboard.
How does this differ from the quick carbon check?
The quick check estimates from transfer size alone. This one adds Lighthouse performance data and a green-hosting lookup, and costs more per run.

Every check runs on our servers: you provide a public URL, there is nothing to install, and pages are rendered with JavaScript first so single-page apps are read the same way a browser reads them. Each result gets a permanent link you can share. On a website you have claimed, findings become tracked issues, and result pages offer AI summaries and developer guidance on plans that include them.