https://osada.us
Sustainability
· 7 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
93
GRADE
A
FIX
0
REVIEW
1
PASS
6
INFO
0
Checks
76 PASS 1 REVIEW
BWeb Font Weight VariantsNo detectable Google Fonts weightsREVIEW
Web Font Weight Variants
No detectable Google Fonts weights
No detectable Google Fonts weights
Info::
No detectable Google Fonts weights
The analyzer detects font weights via Google Fonts URL parameters (~70% of font-using sites). Self-hosted fonts and non-Google CDN fonts aren't visible to URL-based detection. If you self-host fonts, manually audit how many @font-face weights you ship -- 2-3 weights per family is typically enough; 5+ is usually unused payload.
ACO2 Per Page Load0.28g CO2 per viewPASS
CO2 Per Page Load
0.28g CO2 per view
0.28g CO2 per view
Info::
0.28g CO2 per page view
This page transfers 1.2 MB, producing an estimated 0.28g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.06g, end-user device 0.21g.
Got: 0.28g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 33.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 33.2 kg of CO2 annually — equivalent to charging 4144 smartphones.
Info::
Green hosting reduces data center emissions
0.28g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 83% of websites
Sustainable Web Design model v4 · Page size: 1.2 MB
Your site
0.28g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.06g
End-user device
0.21g
At 10,000 monthly views: Monthly: 2.8 kg · Annual: 33.2 kg · ≈ 4144 smartphone charges
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: Verified by the Green Web Foundation
Info::
Cloudflare: 100% renewable energy for global network since 2019
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 Cloudflare✓CDN Cloudflare✓
Cloudflare: Verified by the Green Web Foundation
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 1 KB (vs 1195 KB first visit). 41 of 42 resources are served from browser cache, saving 0.28g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.28g)
First visit
1195 KB
Repeat visit
1 KB
100% reduction on repeat visits
Saving 0.28g CO2 per returning visitor
41 resources served from cache · 1 resources re-downloaded
ACarbon Budget17th percentilePASS
Carbon Budget
17th percentile
17th percentile
Info::
0.28g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 83% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 17th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.28g
17th percentile
Cleaner than 83% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 54% cleaner ✓
vs Target 45% cleaner ✓
A+Transfer Efficiency98% efficientPASS
Transfer Efficiency
98% efficient
98% efficient
Info::
Transfer efficiency: 98%
Only 23 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 23 KB (2% of page weight)
Unused JS 23 KB
0.01g unnecessary CO2 per visit
Actual transfer 1195 KB
Theoretical minimum 1172 KB
Potential savings 23 KB (0.01g 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: Cloudflare
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.