https://fitbit.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
68
GRADE
D
FIX
2
REVIEW
2
PASS
2
INFO
0
Checks
62 PASS 2 REVIEW 2 FIX
DCO2 Per Page LoadAction1.10g CO2 per viewFIX
CO2 Per Page Load
Action1.10g CO2 per view
1.10g CO2 per view
Warning::
1.10g CO2 per page view
This page transfers 4.7 MB, producing an estimated 1.10g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.23g, end-user device 0.85g.
Got: 1.10g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 132.3 kg CO2/year
With 10,000 page views per month, this page would generate approximately 132.3 kg of CO2 annually — equivalent to charging 16532 smartphones.
Info::
Green hosting reduces data center emissions
1.10g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 36% of websites
Sustainable Web Design model v4 · Page size: 4.7 MB
Your site
1.10g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.23g
End-user device
0.85g
At 10,000 monthly views: Monthly: 11.0 kg · Annual: 132.3 kg · ≈ 16532 smartphone charges
DCarbon BudgetAction64th percentileFIX
Carbon Budget
Action64th percentile
64th percentile
Warning::
1.10g CO2 — above the median website (0.60g)
Heavier than an estimated 36% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 64th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.10g
64th percentile
Cleaner than 36% of websites
✗ Above the median website
vs Median 84% more
vs Target 120% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Google Cloud uses renewable energy
Info::
Google Cloud: Verified by the Green Web Foundation
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 Google Cloud✓CDN Not identified✗
Google Cloud: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency76% efficientREVIEW
Transfer Efficiency
76% efficient
76% efficient
Info::
Transfer efficiency: 76%
An estimated 1121 KB (24%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1121 KB of unused JavaScript. This wasted data produces 0.26g of unnecessary CO2 per page view.
Total waste: 1121 KB (24% of page weight)
Unused JS 1121 KB
0.26g unnecessary CO2 per visit
Actual transfer 4768 KB
Theoretical minimum 3647 KB
Potential savings 1121 KB (0.26g CO2)
See Deep Analysis sections above for specific optimizations.
A+Repeat Visit Weight93% cachedPASS
Repeat Visit Weight
93% cached
93% cached
Info::
93% reduction on repeat visits
Returning visitors download only 316 KB (vs 4768 KB first visit). 199 of 201 resources are served from browser cache, saving 1.03g CO2 per repeat visit.
Info::
Repeat visit: 0.07g CO2 (first visit: 1.10g)
First visit
4768 KB
Repeat visit
316 KB
93% reduction on repeat visits
Saving 1.03g CO2 per returning visitor
199 resources served from cache · 2 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: Google Cloud
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.