https://revenuebase.ai
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
85
GRADE
B
FIX
0
REVIEW
4
PASS
3
INFO
1
Checks
83 PASS 4 REVIEW
BCarbon Budget37th percentileREVIEW
Carbon Budget
37th percentile
37th percentile
Info::
0.47g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 63% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 37th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.47g
37th percentile
Cleaner than 63% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 22% cleaner ✓
vs Target 6% cleaner ✓
BTransfer Efficiency86% efficientREVIEW
Transfer Efficiency
86% efficient
86% efficient
Info::
Transfer efficiency: 86%
An estimated 277 KB (14%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 277 KB of unused JavaScript. This wasted data produces 0.06g of unnecessary CO2 per page view.
Total waste: 277 KB (14% of page weight)
Unused JS 277 KB
0.06g unnecessary CO2 per visit
Actual transfer 2037 KB
Theoretical minimum 1760 KB
Potential savings 277 KB (0.06g 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 Load0.47g CO2 per viewPASS
CO2 Per Page Load
0.47g CO2 per view
0.47g CO2 per view
Info::
0.47g CO2 per page view
This page transfers 2.0 MB, producing an estimated 0.47g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.10g, end-user device 0.36g.
Got: 0.47g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 56.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 56.5 kg of CO2 annually — equivalent to charging 7064 smartphones.
Info::
Green hosting reduces data center emissions
0.47g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 63% of websites
Sustainable Web Design model v4 · Page size: 2.0 MB
Your site
0.47g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.10g
End-user device
0.36g
At 10,000 monthly views: Monthly: 4.7 kg · Annual: 56.5 kg · ≈ 7064 smartphone charges
AGreen HostingGreen (cdn)PASS
Green Hosting
Green (cdn)
Green (cdn)
Info::
Cloudflare CDN uses renewable energy
Since most traffic is served through the CDN, the majority of data transfer energy is renewable.
Info::
AWS: Renewable energy varies by region; committed to 100% by 2025
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 AWS✗CDN Cloudflare✓
AWS: Renewable energy varies by region; committed to 100% by 2025
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 62 KB (vs 2037 KB first visit). 97 of 99 resources are served from browser cache, saving 0.46g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.47g)
First visit
2037 KB
Repeat visit
62 KB
97% reduction on repeat visits
Saving 0.46g CO2 per returning visitor
97 resources served from cache · 2 resources re-downloaded
Image Optimization23 images, 0 KB total, 0 KB wastedINFO
Image Optimization
23 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
23
Total Size
0 KB
23 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.