https://www.t7mel.co
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
89
GRADE
B
FIX
0
REVIEW
4
PASS
3
INFO
1
Checks
83 PASS 4 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 Efficiency90% efficientREVIEW
Transfer Efficiency
90% efficient
90% efficient
Info::
Transfer efficiency: 90%
An estimated 198 KB (10%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 198 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.
Total waste: 198 KB (10% of page weight)
Unused JS 198 KB
0.05g unnecessary CO2 per visit
Actual transfer 1924 KB
Theoretical minimum 1726 KB
Potential savings 198 KB (0.05g 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 Load0.44g 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: 53.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 53.4 kg of CO2 annually — equivalent to charging 6674 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: 53.4 kg · ≈ 6674 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::
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 Not identified✗CDN Cloudflare✓
Cloudflare: 100% renewable energy for global network since 2019
Based on known provider commitments. Verify at thegreenwebfoundation.org
A+Repeat Visit Weight94% cachedPASS
Repeat Visit Weight
94% cached
94% cached
Info::
94% reduction on repeat visits
Returning visitors download only 116 KB (vs 1924 KB first visit). 115 of 123 resources are served from browser cache, saving 0.42g CO2 per repeat visit.
Info::
Repeat visit: 0.03g CO2 (first visit: 0.44g)
First visit
1924 KB
Repeat visit
116 KB
94% reduction on repeat visits
Saving 0.42g CO2 per returning visitor
115 resources served from cache · 8 resources re-downloaded
Image Optimization25 images, 5 KB total, 2 KB wastedINFO
Image Optimization
25 images, 5 KB total, 2 KB wasted
Image Optimization Audit
Total Images
25
Total Size
5 KB
Oversized
1
Wasted
2 KB
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.