https://redmine.org
Sustainability
· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
84
GRADE
B
FIX
1
REVIEW
1
PASS
4
INFO
0
Checks
64 PASS 1 REVIEW 1 FIX
DTransfer EfficiencyAction59% efficientFIX
Transfer Efficiency
Action59% efficient
59% efficient
Warning::
Transfer efficiency: 59%
An estimated 229 KB (41%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 229 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.
Total waste: 229 KB (41% of page weight)
Unused JS 229 KB
0.05g unnecessary CO2 per visit
Actual transfer 553 KB
Theoretical minimum 324 KB
Potential savings 229 KB (0.05g CO2)
See Deep Analysis sections above for specific optimizations.
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
Hetzner Online GmbH uses renewable energy
Info::
Hetzner Online GmbH: 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 Hetzner Online GmbH✓CDN Not identified✗
Hetzner Online GmbH: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+CO2 Per Page Load0.13g CO2 per viewPASS
CO2 Per Page Load
0.13g CO2 per view
0.13g CO2 per view
Info::
0.13g CO2 per page view
This page transfers 0.5 MB, producing an estimated 0.13g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.03g, end-user device 0.10g.
Got: 0.13g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 15.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 15.4 kg of CO2 annually — equivalent to charging 1919 smartphones.
Info::
Green hosting reduces data center emissions
0.13g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 90% of websites
Sustainable Web Design model v4 · Page size: 0.5 MB
Your site
0.13g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.00g
Network
0.03g
End-user device
0.10g
At 10,000 monthly views: Monthly: 1.3 kg · Annual: 15.4 kg · ≈ 1919 smartphone charges
A+Repeat Visit Weight96% cachedPASS
Repeat Visit Weight
96% cached
96% cached
Info::
96% reduction on repeat visits
Returning visitors download only 24 KB (vs 553 KB first visit). 32 of 37 resources are served from browser cache, saving 0.12g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.13g)
First visit
553 KB
Repeat visit
24 KB
96% reduction on repeat visits
Saving 0.12g CO2 per returning visitor
32 resources served from cache · 5 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.13g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 90% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 10th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.13g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 79% cleaner ✓
vs Target 74% cleaner ✓
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: Hetzner Online GmbH
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.