https://titanicporn.com
Sustainability
· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.SCORE
79
GRADE
C
FIX
2
REVIEW
2
PASS
3
INFO
1
Checks
83 PASS 2 REVIEW 2 FIX
DCO2 Per Page LoadAction1.08g CO2 per viewFIX
CO2 Per Page Load
Action1.08g CO2 per view
1.08g CO2 per view
Warning::
1.08g CO2 per page view
This page transfers 4.6 MB, producing an estimated 1.08g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.22g, end-user device 0.83g.
Got: 1.08g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 129.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 129.7 kg of CO2 annually — equivalent to charging 16218 smartphones.
Info::
Green hosting reduces data center emissions
1.08g
Carbon Footprint per page view
✗ Above sustainability target (0.50g)
Cleaner than 37% of websites
Sustainable Web Design model v4 · Page size: 4.6 MB
Your site
1.08g
Top 10%
0.20g
Target
0.50g
Median website
0.60g
Energy Breakdown
Data center
0.03g
Network
0.22g
End-user device
0.83g
At 10,000 monthly views: Monthly: 10.8 kg · Annual: 129.7 kg · ≈ 16218 smartphone charges
DCarbon BudgetAction63th percentileFIX
Carbon Budget
Action63th percentile
63th percentile
Warning::
1.08g CO2 — above the median website (0.60g)
Heavier than an estimated 37% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 63th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website
1.08g
63rd percentile
Cleaner than 37% of websites
✗ Above the median website
vs Median 80% more
vs Target 116% more
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
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 Weight99% cachedPASS
Repeat Visit Weight
99% cached
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 28 KB (vs 4677 KB first visit). 94 of 99 resources are served from browser cache, saving 1.07g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.08g)
First visit
4677 KB
Repeat visit
28 KB
99% reduction on repeat visits
Saving 1.07g CO2 per returning visitor
94 resources served from cache · 5 resources re-downloaded
A+Transfer Efficiency98% efficientPASS
Transfer Efficiency
98% efficient
98% efficient
Info::
Transfer efficiency: 98%
Only 106 KB of potential savings identified. Your page is well-optimized for size.
Total waste: 106 KB (2% of page weight)
Unused JS 106 KB
0.02g unnecessary CO2 per visit
Actual transfer 4677 KB
Theoretical minimum 4571 KB
Potential savings 106 KB (0.02g CO2)
See Deep Analysis sections above for specific optimizations.
Image Optimization34 images, 1792 KB total, 1655 KB wastedINFO
Image Optimization
34 images, 1792 KB total, 1655 KB wasted
Image Optimization Audit
Total Images
34
Total Size
1792 KB
Oversized
31
Wasted
1655 KB
2 missing alt text 4 missing dimensions 33 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.