0.143 g
cleaner than an estimated 80.3% 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
- 0.189 g CO₂e
- 0.0057 g CO₂e
- unknown
- 368 ms
- n/a
- 7 ms
At 10,000 views a month this page emits about 17.2 kg CO₂e a year, roughly 70 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 3%, and world-average grid intensity. How we calculate this
What to fix
apply everything → ~0.126 g/visit, rating B
Reduce JavaScript payloadsave ~0.017 g/visit (153 kB)Medium impact · moderate effort
37 scripts total 613 kB on the wire (1.85 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.
- 0soca707a_xdu.js74 kB
- fides.js51 kB
- 0n7lgc0ejk7eq.js39 kB
- 3vwykanpyal6m.js37 kB
- 1zdxk5p6j_v4b.js36 kB
Verify your hosting energyMedium impact · moderate effort
This host has not published renewable energy evidence with the Green Web Foundation, so its energy source is unknown.
Choose a provider listed in the Green Web Directory, or ask your current provider to publish evidence (and a carbon.txt). This cuts the data-center share of every single page view.
Remove references to broken resourcessave ~<0.001 g/visit (139 B)Advisory · quick fix
1 request answered 4xx/5xx on load: transfer and connections spent on nothing, on every single visit.
Delete or fix the references (stale asset URLs, dead third-party tags). Each one is a request the page provably does not need.
- get-sessionHTTP 401 · 139 B
Simplify the document structureAdvisory · larger effort
The page renders 2382 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
- JavaScript613 kB · 37 req
- Images352 kB · 37 req
- Fonts96 kB · 2 req
- CSS94 kB · 6 req
- Data (fetch)83 kB · 16 req
- HTML36 kB · 1 req
- Other218 B · 1 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| nextjs.org/_next/image?url=https%3A%2F%2Fh8DxKfmAPhn8O0p3.public.blob.vercel-storage.com%2Fnextjs%2Fshowcase%2Ftemplate-next-gallery.jpg&w=1920&q=75 | image | 124 kB | public, max-age=2592000, must-revalidate |
| nextjs.org/_next/static/immutable/chunks/0soca707a_xdu.js | script | 74 kB | public,max-age=31536000,immutable |
| nextjs.org/_next/static/immutable/media/Geist_Variable-s.p.2v-cf9syxr5ni.woff2 | font | 72 kB | public,max-age=31536000,immutable |
| nextjs.org/_next/static/immutable/chunks/33qz44j5-yezh.css | stylesheet | 69 kB | public,max-age=31536000,immutable |
| nextjs.org/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fpreview-dice.08i49o1fp-1xa.png&w=640&q=75 | image | 63 kB | public,max-age=31536000,immutable |
| nextjs.org/_stream/external/vercel.fides-cdn.ethyca.com/fides.js?geolocation=EEA | script | 51 kB | max-age=3600, stale-while-revalidate=86400, stale-if-error=86400, public |
| nextjs.org/_next/static/immutable/chunks/0n7lgc0ejk7eq.js | script | 39 kB | public,max-age=31536000,immutable |
| nextjs.org/_next/static/immutable/chunks/3vwykanpyal6m.js | script | 37 kB | public,max-age=31536000,immutable |
| nextjs.org/ | document | 36 kB | public, max-age=0, must-revalidate |
| nextjs.org/_next/static/immutable/chunks/1zdxk5p6j_v4b.js | script | 36 kB | public,max-age=31536000,immutable |
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<a href="https://carbonless.cc/report/nextjs.org"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fnextjs.org" 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.