https://ionos.com
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
76
GRADE
C
FIX
2
REVIEW
1
PASS
3
INFO
0
Checks
63 PASS 1 REVIEW 2 FIX
DCO2 Per Page LoadAction1.28g CO2 per viewFIX
CO2 Per Page Load
Action1.28g CO2 per view
1.28g CO2 per view
Warning::
1.28g CO2 per page view
This page transfers 5.4 MB, producing an estimated 1.28g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.27g, end-user device 0.99g.
Got: 1.28g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 154.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 154.2 kg of CO2 annually — equivalent to charging 19274 smartphones.
Info::
Green hosting reduces data center emissions
1.28g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 31% of websites
Sustainable Web Design model v4 · Page size: 5.4 MB
Your site
1.28g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.27g
End-user device
0.99g
At 10,000 monthly views: Monthly: 12.8 kg · Annual: 154.2 kg · ≈ 19274 smartphone charges
DCarbon BudgetAction69th percentileFIX
Carbon Budget
Action69th percentile
69th percentile
Warning::
1.28g CO2 — above the median website (0.60g)
Heavier than an estimated 31% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 69th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.28g
69th percentile
Cleaner than 31% of websites
✗ Above the median website
vs Median 114% more
vs Target 157% more
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Apache HTTP Server uses renewable energy
Info::
Apache HTTP Server: 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 Apache HTTP Server✓CDN Not identified✗
Apache HTTP Server: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 72 KB (vs 5559 KB first visit). 211 of 214 resources are served from browser cache, saving 1.27g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.28g)
First visit
5559 KB
Repeat visit
72 KB
99% reduction on repeat visits
Saving 1.27g CO2 per returning visitor
211 resources served from cache · 3 resources re-downloaded
A+Transfer Efficiency91% efficientPASS
Transfer Efficiency
91% efficient
91% efficient
Info::
Transfer efficiency: 91%
Only 500 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 500 KB (9% of page weight)
Unused JS 500 KB
0.12g unnecessary CO2 per visit
Actual transfer 5559 KB
Theoretical minimum 5058 KB
Potential savings 500 KB (0.12g CO2)
See Deep Analysis sections above for specific optimizations.
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: IONOS SE
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.