0.075 g
cleaner than an estimated 90.6% of pages on the web
- A+
- A
- B
- C
- D
- E
- F
A+ is 0.04 g or less per view, F is more than 0.359 g CO₂e.
The numbers
- 0.098 g CO₂e
- 0.0048 g CO₂e
- verified green
- 316 ms
- n/a
- 97 ms
At 10,000 views a month this page emits about 8.9 kg CO₂e a year, roughly 37 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 5%, and world-average grid intensity. How we calculate this
What to fix
apply everything → ~0.050 g/visit, rating A
Reduce JavaScript payloadsave ~0.010 g/visit (111 kB)Medium impact · moderate effort
20 scripts total 443 kB on the wire (1.35 MB decoded). Bundles this size usually carry a lot of unused code.
Split bundles per route, tree-shake dependencies, and audit with a bundle analyzer or coverage profile. A 25% cut is a conservative target for bundles this size.
- js170 kB
- 0zrrx.7z4hkql.js73 kB
- 0gyhlsobr-.-~.js30 kB
- 0_49wcgubhcj3.js29 kB
- 0ty_._x51c73j.js22 kB
Optimize web fontssave ~0.0096 g/visit (104 kB)Advisory · quick fix
4 font files total 297 kB.
Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.
- b67966e0b83b2cd0-s.p.04y9-s23ppywx.woff2121 kB
- 1bffadaabf893a1e-s.16ipb6fqu393i.woff286 kB
- 83afe278b6a6bb3c-s.p.0q-301v4kxxnr.woff249 kB
- 70bc3e132a0a741e-s.p.1409xf.ylxg8g.woff241 kB
Upgrade compression beyond gzipsave ~0.0042 g/visit (46 kB)Advisory · quick fix
305 kB of text ships gzip-compressed; Brotli or Zstandard would cut roughly another 15-20%, and browsers without them fall back to gzip automatically.
Serve precompressed Brotli for static text assets (highest level, compressed at build time) and enable Brotli or zstd for dynamic responses; keep gzip only as the fallback.
- 0zrrx.7z4hkql.js73 kB
- 0gyhlsobr-.-~.js30 kB
- 0_49wcgubhcj3.js29 kB
- 0~-i1t~nps0~h.css23 kB
- 0ty_._x51c73j.js22 kB
Simplify the document structureAdvisory · larger effort
The page renders 2838 DOM elements, above the 1,500 guideline. Large trees cost memory and CPU on every visitor's device.
Flatten wrapper markup, render long lists virtually or paginate, and prefer semantic elements over nested divs.
Where the bytes are
- JavaScript443 kB · 20 req
- Fonts297 kB · 4 req
- HTML36 kB · 1 req
- CSS24 kB · 2 req
- Data (fetch)6.8 kB · 5 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| www.googletagmanager.com/gtag/js?id=G-20GZ8STEZY | script | 170 kB | private, max-age=900 |
| duckville.town/_next/static/media/b67966e0b83b2cd0-s.p.04y9-s23ppywx.woff2 | font | 121 kB | public, max-age=31536000, immutable |
| duckville.town/_next/static/media/1bffadaabf893a1e-s.16ipb6fqu393i.woff2 | font | 86 kB | public, max-age=31536000, immutable |
| duckville.town/_next/static/chunks/0zrrx.7z4hkql.js | script | 73 kB | public, max-age=31536000, immutable |
| duckville.town/_next/static/media/83afe278b6a6bb3c-s.p.0q-301v4kxxnr.woff2 | font | 49 kB | public, max-age=31536000, immutable |
| duckville.town/_next/static/media/70bc3e132a0a741e-s.p.1409xf.ylxg8g.woff2 | font | 41 kB | public, max-age=31536000, immutable |
| duckville.town/ | document | 36 kB | private, no-cache, no-store, max-age=0, must-revalidate |
| duckville.town/_next/static/chunks/0gyhlsobr-.-~.js | script | 30 kB | public, max-age=31536000, immutable |
| duckville.town/_next/static/chunks/0_49wcgubhcj3.js | script | 29 kB | public, max-age=31536000, immutable |
| duckville.town/_next/static/chunks/0~-i1t~nps0~h.css | stylesheet | 23 kB | public, max-age=31536000, immutable |
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<a href="https://carbonless.cc/report/duckville.town"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fduckville.town" alt="Carbon rating for this page" width="150" height="30" loading="lazy" /></a>The badge is a lightweight SVG (under 1 kB) served with long-lived caching, so a new scan can take up to a day to show through.