https://officeox.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
79
GRADE
C
FIX
1
REVIEW
4
PASS
2
INFO
1
Checks
82 PASS 4 REVIEW 1 FIX
DGreen HostingActionUnknownFIX
Green Hosting
ActionUnknown
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗
Based on known provider commitments. Verify at thegreenwebfoundation.org
BCarbon Budget36th percentileREVIEW
Carbon Budget
36th percentile
36th percentile
Info::
0.46g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 64% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 36th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.46g
36th percentile
Cleaner than 64% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 23% cleaner ✓
vs Target 7% cleaner ✓
BTransfer Efficiency82% efficientREVIEW
Transfer Efficiency
82% efficient
82% efficient
Info::
Transfer efficiency: 82%
An estimated 305 KB (18%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 305 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.
Total waste: 305 KB (18% of page weight)
Unused JS 305 KB
0.08g unnecessary CO2 per visit
Actual transfer 1675 KB
Theoretical minimum 1370 KB
Potential savings 305 KB (0.08g CO2)
See Deep Analysis sections above for specific optimizations.
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.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
ACO2 Per Page Load0.46g CO2 per viewPASS
CO2 Per Page Load
0.46g CO2 per view
0.46g CO2 per view
Info::
0.46g CO2 per page view
This page transfers 1.6 MB, producing an estimated 0.46g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.09g, network 0.08g, end-user device 0.30g.
Got: 0.46g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 55.6 kg CO2/year
With 10,000 page views per month, this page would generate approximately 55.6 kg of CO2 annually — equivalent to charging 6951 smartphones.
0.46g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 64% of websites
Sustainable Web Design model v4 · Page size: 1.6 MB
Your site
0.46g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.09g
Network
0.08g
End-user device
0.30g
At 10,000 monthly views: Monthly: 4.6 kg · Annual: 55.6 kg · ≈ 6951 smartphone charges
A+Repeat Visit Weight100% cachedPASS
Repeat Visit Weight
100% cached
100% cached
Info::
100% reduction on repeat visits
Returning visitors download only 7 KB (vs 1675 KB first visit). 109 of 110 resources are served from browser cache, saving 0.46g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.46g)
First visit
1675 KB
Repeat visit
7 KB
100% reduction on repeat visits
Saving 0.46g CO2 per returning visitor
109 resources served from cache · 1 resources re-downloaded
Image Optimization76 images, 682 KB total, 0 KB wastedINFO
Image Optimization
76 images, 682 KB total, 0 KB wasted
Image Optimization Audit
Total Images
76
Total Size
682 KB
76 missing dimensions 75 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.