https://pullitpacks.com
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 Efficiency90% efficientREVIEW
Transfer Efficiency
90% efficient
90% efficient
Info::
Transfer efficiency: 90%
An estimated 101 KB (10%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 101 KB of unused JavaScript. This wasted data produces 0.03g of unnecessary CO2 per page view.
Total waste: 101 KB (10% of page weight)
Unused JS 101 KB
0.03g unnecessary CO2 per visit
Actual transfer 988 KB
Theoretical minimum 887 KB
Potential savings 101 KB (0.03g 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 Load0.27g CO2 per viewPASS
CO2 Per Page Load
0.27g CO2 per view
0.27g CO2 per view
Info::
0.27g CO2 per page view
This page transfers 1.0 MB, producing an estimated 0.27g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.05g, network 0.05g, end-user device 0.18g.
Got: 0.27g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 32.8 kg CO2/year
With 10,000 page views per month, this page would generate approximately 32.8 kg of CO2 annually — equivalent to charging 4101 smartphones.
0.27g
Carbon Footprint per page view
✓ Below sustainability target (0.50g)
Cleaner than 83% of websites
Sustainable Web Design model v4 · Page size: 1.0 MB
Your site
0.27g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.05g
Network
0.05g
End-user device
0.18g
At 10,000 monthly views: Monthly: 2.7 kg · Annual: 32.8 kg · ≈ 4101 smartphone charges
A+Repeat Visit Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 8 KB (vs 988 KB first visit). 34 of 35 resources are served from browser cache, saving 0.27g CO2 per repeat visit.
Info::
Repeat visit: 0.00g CO2 (first visit: 0.27g)
First visit
988 KB
Repeat visit
8 KB
99% reduction on repeat visits
Saving 0.27g CO2 per returning visitor
34 resources served from cache · 1 resources re-downloaded
ACarbon Budget17th percentilePASS
Carbon Budget
17th percentile
17th percentile
Info::
0.27g CO2 — below the sustainability target of 0.50g
Cleaner than an estimated 83% of websites analyzed. This page meets the Web Sustainability Guidelines target.
Info::
Estimated 17th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
0.27g
17th percentile
Cleaner than 83% of websites
✓ Below the Web Sustainability Guidelines target
vs Median 54% cleaner ✓
vs Target 45% cleaner ✓
Image Optimization29 images, 0 KB total, 0 KB wastedINFO
Image Optimization
29 images, 0 KB total, 0 KB wasted
Image Optimization Audit
Total Images
29
Total Size
0 KB
1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.