https://ionos.de
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 LoadAction1.21g CO2 per viewFIX
CO2 Per Page Load
Action1.21g CO2 per view
1.21g CO2 per view
Warning::
1.21g CO2 per page view
This page transfers 5.1 MB, producing an estimated 1.21g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.25g, end-user device 0.93g.
Got: 1.21g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 145.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 145.1 kg of CO2 annually — equivalent to charging 18134 smartphones.
Info::
Green hosting reduces data center emissions
1.21g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 33% of websites
Sustainable Web Design model v4 · Page size: 5.1 MB
Your site
1.21g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.25g
End-user device
0.93g
At 10,000 monthly views: Monthly: 12.1 kg · Annual: 145.1 kg · ≈ 18134 smartphone charges
DCarbon BudgetAction67th percentileFIX
Carbon Budget
Action67th percentile
67th percentile
Warning::
1.21g CO2 — above the median website (0.60g)
Heavier than an estimated 33% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 67th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.21g
67th percentile
Cleaner than 33% of websites
✗ Above the median website
vs Median 101% more
vs Target 142% 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 Weight98% cachedPASS
Repeat Visit Weight
98% cached
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 88 KB (vs 5230 KB first visit). 81 of 82 resources are served from browser cache, saving 1.19g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.21g)
First visit
5230 KB
Repeat visit
88 KB
98% reduction on repeat visits
Saving 1.19g CO2 per returning visitor
81 resources served from cache · 1 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 137 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 137 KB (3% of page weight)
Unused JS 137 KB
0.03g unnecessary CO2 per visit
Actual transfer 5230 KB
Theoretical minimum 5093 KB
Potential savings 137 KB (0.03g 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.