https://vimeo.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
62
GRADE
D
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
FCO2 Per Page LoadAction3.90g CO2 per viewFIX
CO2 Per Page Load
Action3.90g CO2 per view
3.90g CO2 per view
Critical::
3.90g CO2 per page view
This page transfers 16.5 MB, producing an estimated 3.90g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.10g, network 0.81g, end-user device 3.00g.
Got: 3.90g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 468.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 468.5 kg of CO2 annually — equivalent to charging 58558 smartphones.
Info::
Green hosting reduces data center emissions
3.90g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 5% of websites
Sustainable Web Design model v4 · Page size: 16.5 MB
Your site
3.90g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.10g
Network
0.81g
End-user device
3.00g
At 10,000 monthly views: Monthly: 39.0 kg · Annual: 468.5 kg · ≈ 58558 smartphone charges
FCarbon BudgetAction95th percentileFIX
Carbon Budget
Action95th percentile
95th percentile
Warning::
3.90g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
3.90g
95th percentile
Cleaner than 5% of websites
✗ Above the median website
vs Median 551% more
vs Target 681% more
BTransfer Efficiency85% efficientREVIEW
Transfer Efficiency
85% efficient
85% efficient
Info::
Transfer efficiency: 85%
An estimated 2456 KB (15%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 2456 KB of unused JavaScript. This wasted data produces 0.57g of unnecessary CO2 per page view.
Total waste: 2456 KB (15% of page weight)
Unused JS 2456 KB
0.57g unnecessary CO2 per visit
Actual transfer 16889 KB
Theoretical minimum 14433 KB
Potential savings 2456 KB (0.57g CO2)
See Deep Analysis sections above for specific optimizations.
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Next.js, CDN: Cloudflare
Info::
Next.js: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
Info::
Green hosting status based on known provider commitments
Green hosting detection uses a curated database of provider renewable energy commitments. This is not a real-time verification. For authoritative checks, visit thegreenwebfoundation.org.
Green Hosting✓ Green Hosted
Hosting Next.js✓CDN Cloudflare✓
Next.js: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 327 KB (vs 16889 KB first visit). 185 of 188 resources are served from browser cache, saving 3.83g CO2 per repeat visit.
Info::
Repeat visit: 0.08g CO2 (first visit: 3.90g)
First visit
16889 KB
Repeat visit
327 KB
98% reduction on repeat visits
Saving 3.83g CO2 per returning visitor
185 resources served from cache · 3 resources re-downloaded
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.