Curated picks
Tools
Open a card for a full guide and a browser-only tool — no uploads. Details and external picks are below.
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In-browser tools
Utilities that run locally in your browser — use the topic filter above to narrow the list.
No tools match this filter. Choose “All” or another topic.
Hand-picked from the web
Editorial bookmarks for audits and research — each opens in a new tab at the provider.
Editor’s pick
@cometweb/carbon-badgeLightweight website carbon footprint badge for your pages — npm package for teams and static sites.
EcologyExternal- Ecograder
Sustainability score with actionable recommendations.
EcologyExternal - Green Web Foundation
Directory and APIs for green hosting verification.
EcologyExternal - Website Carbon Calculator
Rough CO₂ estimate per page view and hosting context.
EcologyExternal
Further down you will find hand-picked third-party tools we use in audits (each opens in a new tab), plus links to our topic hubs and the rest of the site.
For deeper reading, jump into our topic hubs. Everything here opens in a new tab on the provider’s site.
Explore our Performance, Ecology, Accessibility, Security, and SEO hubs for deeper reading.