https://greenly.earth
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
90
GRADE
A
FIX
0
REVIEW
3
PASS
4
INFO
1
Checks
84 PASS 3 REVIEW
BCarbon Budget34th percentileREVIEW
Carbon Budget
34th percentile
34th percentile
Info::
0.44g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 66% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 34th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.44g
34th percentile
Cleaner than 66% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 26% cleaner ✓
vs Target 11% cleaner ✓
BTransfer Efficiency81% efficientREVIEW
Transfer Efficiency
81% efficient
81% efficient
Info::
Transfer efficiency: 81%
An estimated 364 KB (19%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 364 KB of unused JavaScript. This wasted data produces 0.08g of unnecessary CO2 per page view.
Total waste: 364 KB (19% of page weight)
Unused JS 364 KB
0.08g unnecessary CO2 per visit
Actual transfer 1917 KB
Theoretical minimum 1553 KB
Potential savings 364 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.
ACO2 Per Page Load0.44g CO2 per viewPASS
CO2 Per Page Load
0.44g CO2 per view
0.44g CO2 per view
Info::
0.44g CO2 per page view
This page transfers 1.9 MB, producing an estimated 0.44g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.01g, network 0.09g, end-user device 0.34g.
Got: 0.44g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 53.2 kg CO2/year
With 10,000 page views per month, this page would generate approximately 53.2 kg of CO2 annually — equivalent to charging 6648 smartphones.
Info::
Green hosting reduces data center emissions
0.44g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 66% of websites
Sustainable Web Design model v4 · Page size: 1.9 MB
Your site
0.44g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.01g
Network
0.09g
End-user device
0.34g
At 10,000 monthly views: Monthly: 4.4 kg · Annual: 53.2 kg · ≈ 6648 smartphone charges
A+Green HostingGreen (both)PASS
Green Hosting
Green (both)
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Amazon Web Services, CDN: Cloudflare
Info::
Amazon Web Services: 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 Amazon Web Services✓CDN Cloudflare✓
Amazon Web Services: 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 Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 47 KB (vs 1917 KB first visit). 150 of 152 resources are served from browser cache, saving 0.43g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.44g)
First visit
1917 KB
Repeat visit
47 KB
97% reduction on repeat visits
Saving 0.43g CO2 per returning visitor
150 resources served from cache · 2 resources re-downloaded
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
Image Optimization27 images, 124 KB total, 67 KB wastedINFO
Image Optimization
27 images, 124 KB total, 67 KB wasted
Image Optimization Audit
Total Images
27
Total Size
124 KB
Oversized
2
Wasted
67 KB
1 missing alt text 2 missing dimensions 6 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.