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
FCO2 Per Page LoadAction1.51g CO2 per viewFIX
CO2 Per Page Load
Action1.51g CO2 per view
1.51g CO2 per view
Warning::
1.51g CO2 per page view
This page transfers 6.4 MB, producing an estimated 1.51g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.04g, network 0.31g, end-user device 1.16g.
Got: 1.51g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 181.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 181.8 kg of CO2 annually — equivalent to charging 22720 smartphones.
Info::
Green hosting reduces data center emissions
1.51g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 24% of websites
Sustainable Web Design model v4 · Page size: 6.4 MB
Your site
1.51g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.04g
Network
0.31g
End-user device
1.16g
At 10,000 monthly views: Monthly: 15.1 kg · Annual: 181.8 kg · ≈ 22720 smartphone charges
FCarbon BudgetAction76th percentileFIX
Carbon Budget
Action76th percentile
76th percentile
Warning::
1.51g CO2 — above the median website (0.60g)
Heavier than an estimated 24% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 76th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.51g
76th percentile
Cleaner than 24% of websites
✗ Above the median website
vs Median 152% more
vs Target 203% 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 92 KB (vs 6553 KB first visit). 171 of 176 resources are served from browser cache, saving 1.49g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 1.51g)
First visit
6553 KB
Repeat visit
92 KB
99% reduction on repeat visits
Saving 1.49g CO2 per returning visitor
171 resources served from cache · 5 resources re-downloaded
A+Transfer Efficiency97% efficientPASS
Transfer Efficiency
97% efficient
97% efficient
Info::
Transfer efficiency: 97%
Only 211 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 211 KB (3% of page weight)
Unused JS 211 KB
0.05g unnecessary CO2 per visit
Actual transfer 6553 KB
Theoretical minimum 6341 KB
Potential savings 211 KB (0.05g 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.