0.281 g
cleaner than an estimated 59.7% 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
- 0.350 g CO₂e
- 0.074 g CO₂e
- unknown
- 364 ms
- n/a
- 7 ms
At 10,000 views a month this page emits about 33.7 kg CO₂e a year, roughly 138 km in an average petrol car. The estimate assumes 75% new and 25% returning visitors, a measured cache reload ratio of 21%, and world-average grid intensity. How we calculate this
What to fix
apply everything → ~0.231 g/visit, rating D
Reduce JavaScript payloadsave ~0.040 g/visit (333 kB)High impact · moderate effort
78 scripts total 1.33 MB on the wire (4.19 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.
- 0342-l_jkqj0e.js104 kB
- 3arx86bykke0f.js71 kB
- 1tn68il3dsajn.js67 kB
- 2tdbmhq3xxja5.js63 kB
- 01dcvdfkxxit5.js52 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.
- carbon.txtThe host publishes a carbon.txt; its evidence has not reached the Green Web Foundation dataset yet.
Optimize web fontssave ~0.0095 g/visit (80 kB)Advisory · quick fix
7 font files total 228 kB.
Subset fonts to used glyphs, prefer one variable font over multiple weights, serve WOFF2 only, and consider system fonts for UI text.
- Geist_Variable-s.p.2v-cf9syxr5ni.woff270 kB
- GeistPixel_Triangle.p.0s2yyo-clipe_.woff229 kB
- GeistPixel_Square.p.3ig4wtfmw09gh.woff229 kB
- GeistPixel_Grid.p.0c5uz3kz61pux.woff229 kB
- GeistPixel_Circle.p.2p5mi6n8co77s.woff229 kB
Remove references to broken resourcessave ~<0.001 g/visit (2.0 kB)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.
- jwtHTTP 403 · 2.0 kB
Set a page-weight budgetAdvisory · moderate effort
At 2.36 MB per view this page rates E. The findings above list where the weight is.
Agree a transfer budget (e.g. under 975 kB reaches a B), enforce it in CI, and re-scan after each change to hold the line.
Remove the entry redirectAdvisory · quick fix
The address that was scanned goes through 1 redirect before the document is served. Every hop is a full round trip on a connection that has not warmed up yet.
Point links, sitemaps and canonical tags at the final address, and make the host redirect in one hop rather than chaining http to https to www.
Where the bytes are
- JavaScript1.33 MB · 78 req
- Other364 kB · 8 req
- Fonts228 kB · 7 req
- CSS152 kB · 4 req
- Data (fetch)140 kB · 10 req
- Images86 kB · 8 req
- HTML58 kB · 1 req
Ten heaviest requests
| Resource | Type | Wire size | Cache-Control |
|---|---|---|---|
| vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/25152x7tkd-xq.css | stylesheet | 114 kB | public,max-age=31536000,immutable |
| vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/0342-l_jkqj0e.js | script | 104 kB | public,max-age=31536000,immutable |
| vercel.com/marketplace | prefetch | 92 kB | public, max-age=0, must-revalidate |
| vercel.com/docs | prefetch | 83 kB | public, max-age=0, must-revalidate |
| vercel.com/new | prefetch | 76 kB | public, max-age=0, must-revalidate |
| vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/3arx86bykke0f.js | script | 71 kB | public,max-age=31536000,immutable |
| vercel.com/vc-ap-vercel-marketing/_next/static/immutable/media/Geist_Variable-s.p.2v-cf9syxr5ni.woff2 | font | 70 kB | public,max-age=31536000,immutable |
| vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/1tn68il3dsajn.js | script | 67 kB | public,max-age=31536000,immutable |
| vercel.com/vc-ap-vercel-marketing/_next/static/immutable/chunks/2tdbmhq3xxja5.js | script | 63 kB | public,max-age=31536000,immutable |
| vercel.com/ | document | 58 kB | public, max-age=0, must-revalidate |
Share this report
<a href="https://carbonless.cc/report/vercel.com"><img src="https://carbonless.cc/api/badge?url=https%3A%2F%2Fvercel.com" 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.