https://codeberg.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 EfficiencyAction46% efficientFIX
Transfer Efficiency
Action46% efficient
46% efficient
Critical::
Transfer efficiency: 46%
An estimated 276 KB (54%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 276 KB of unused JavaScript. This wasted data produces 0.06g of unnecessary CO2 per page view.
Total waste: 276 KB (54% of page weight)
Unused JS 276 KB
0.06g unnecessary CO2 per visit
Actual transfer 512 KB
Theoretical minimum 235 KB
Potential savings 276 KB (0.06g CO2)
See Deep Analysis sections above for specific optimizations.
BGreen HostingGreen (hosting)REVIEW
Green Hosting
Green (hosting)
Green (hosting)
Info::
netcup GmbH uses renewable energy
Info::
netcup 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 netcup GmbH✓CDN Not identified✗
netcup GmbH: Verified by the Green Web Foundation
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+CO2 Per Page Load0.12g CO2 per viewPASS
CO2 Per Page Load
0.12g CO2 per view
0.12g CO2 per view
Info::
0.12g CO2 per page view
This page transfers 0.5 MB, producing an estimated 0.12g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.00g, network 0.02g, end-user device 0.09g.
Got: 0.12g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 14.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 14.2 kg of CO2 annually — equivalent to charging 1776 smartphones.
Info::
Green hosting reduces data center emissions
0.12g
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
0.12g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.00g
Network
0.02g
End-user device
0.09g
At 10,000 monthly views: Monthly: 1.2 kg · Annual: 14.2 kg · ≈ 1776 smartphone charges
A+Repeat Visit Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 32 KB (vs 512 KB first visit). 11 of 12 resources are served from browser cache, saving 0.11g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.12g)
First visit
512 KB
Repeat visit
32 KB
94% reduction on repeat visits
Saving 0.11g CO2 per returning visitor
11 resources served from cache · 1 resources re-downloaded
A+Carbon Budget10th percentilePASS
Carbon Budget
10th percentile
10th percentile
Info::
0.12g 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
0.12g
10th percentile
Cleaner than 90% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 80% cleaner ✓
vs Target 76% 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: netcup GmbH
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.