https://www.climeup.ai
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
80
GRADE
B
FIX
1
REVIEW
3
PASS
3
INFO
1
Checks
83 PASS 3 REVIEW 1 FIX
DGreen HostingActionNot greenFIX
Green Hosting
ActionNot green
Not green
Info::
No confirmed renewable energy commitment detected
Consider providers like Cloudflare, Google Cloud, or Vercel that match 100% of their energy use with renewables.
Info::
AWS: Renewable energy varies by region; committed to 100% by 2025
Info::
AWS CloudFront: Renewable varies by edge location
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 HostingNot Green Hosted
Hosting AWS✗CDN AWS CloudFront✗
AWS: Renewable energy varies by region; committed to 100% by 2025
AWS CloudFront: Renewable varies by edge location
Based on known provider commitments. Verify at thegreenwebfoundation.org
BTransfer Efficiency85% efficientREVIEW
Transfer Efficiency
85% efficient
85% efficient
Info::
Transfer efficiency: 85%
An estimated 177 KB (15%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 177 KB of unused JavaScript. This wasted data produces 0.05g of unnecessary CO2 per page view.
Total waste: 177 KB (15% of page weight)
Unused JS 177 KB
0.05g unnecessary CO2 per visit
Actual transfer 1200 KB
Theoretical minimum 1023 KB
Potential savings 177 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 Load0.33g CO2 per viewPASS
CO2 Per Page Load
0.33g CO2 per view
0.33g CO2 per view
Info::
0.33g CO2 per page view
This page transfers 1.2 MB, producing an estimated 0.33g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.06g, network 0.06g, end-user device 0.21g.
Got: 0.33g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 39.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 39.8 kg of CO2 annually — equivalent to charging 4980 smartphones.
0.33g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 77% of websites
Sustainable Web Design model v4 · Page size: 1.2 MB
Your site
0.33g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.06g
Network
0.06g
End-user device
0.21g
At 10,000 monthly views: Monthly: 3.3 kg · Annual: 39.8 kg · ≈ 4980 smartphone charges
A+Repeat Visit Weight97% cachedPASS
Repeat Visit Weight
97% cached
97% cached
Info::
97% reduction on repeat visits
Returning visitors download only 32 KB (vs 1200 KB first visit). 76 of 77 resources are served from browser cache, saving 0.32g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 0.33g)
First visit
1200 KB
Repeat visit
32 KB
97% reduction on repeat visits
Saving 0.32g CO2 per returning visitor
76 resources served from cache · 1 resources re-downloaded
ACarbon Budget23th percentilePASS
Carbon Budget
23th percentile
23th percentile
Info::
0.33g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 77% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 23th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.33g
23rd percentile
Cleaner than 77% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 45% cleaner ✓
vs Target 34% cleaner ✓
Image Optimization36 images, 114 KB total, 0 KB wastedINFO
Image Optimization
36 images, 114 KB total, 0 KB wasted
Image Optimization Audit
Total Images
36
Total Size
114 KB
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.