Measure website impact in seconds
Paste a URL to estimate total transfer size, CO₂ per 1,000 views, and bandwidth cost. View trends on the dashboard and receive prioritized optimization guidance.
- Deterministic metrics
- Interactive charts
- Actionable recommendations
Dashboard
Asset mix (latest audit)
Distribution of bytes by file type for the most recent audit.Key metrics (latest audit)
Totals for page weight, CO₂ per 1k views, and cost per 1k views.CO₂ trend (last 10 audits)
Stored locally in your browser. Clear with the button below.Recent audits
| Date | URL | Bytes | CO₂ /1k | Cost /1k |
|---|
How it works
Pricing
FAQ
How accurate are the estimates?
Estimates are based on total transferred bytes combined with configurable intensity factors (kWh/GB, gCO₂/kWh, and bandwidth cost/GB). Actual emissions can vary by data center region, CDN configuration, and caching. For compliance reporting, you can supply region-specific factors to improve precision.
What types of pages work best?
Public pages without authentication. Some sites block automated requests; when that happens, we return a best-effort result based on accessible assets. You’ll still receive optimization recommendations derived from the assets we can analyze.
Do you store my data?
By default, audits on this demo are stored locally in your browser (no server storage). Pro/Business plans will support private cloud storage, team access, and exportable audit history.
How should I interpret CO₂ per 1,000 views?
It approximates emissions for a thousand page views of the audited page. Use it to compare pages, track improvements over time, and estimate impact at your traffic volumes (e.g., 50k views ≈ 50 × the 1k figure).
How can I reduce my numbers quickly?
Compress large images, use modern formats (WebP/AVIF), defer or remove non-critical scripts, enable Brotli/gzip compression, and leverage a CDN with caching. Our recommendations list flags the largest opportunities by asset type.