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https://renaissancejewel.com

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
65
GRADE
D
FIX
2
REVIEW
2
PASS
3
INFO
1
Device:
Mobile Desktop
Checks
8
3 PASS 2 REVIEW 2 FIX
F
CO2 Per Page Load
Action
2.45g CO2 per view
FIX
2.45g CO2 per view
Critical::
2.45g CO2 per page view
This page transfers 10.4 MB, producing an estimated 2.45g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.06g, network 0.51g, end-user device 1.89g.
Got: 2.45g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 294.5 kg CO2/year
With 10,000 page views per month, this page would generate approximately 294.5 kg of CO2 annually — equivalent to charging 36810 smartphones.
Info::
Green hosting reduces data center emissions

2.45g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 10.4 MB

Your site
2.45g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.06g
Network
0.51g
End-user device
1.89g
At 10,000 monthly views: Monthly: 24.5 kg · Annual: 294.5 kg · ≈ 36810 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.45g CO2 — above the median website (0.60g)
Heavier than an estimated 5% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 95th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

2.45g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 309% more
vs Target 391% more
B
Transfer Efficiency
90% efficient
REVIEW
90% efficient
Info::
Transfer efficiency: 90%
An estimated 1085 KB (10%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1085 KB of unused JavaScript. This wasted data produces 0.25g of unnecessary CO2 per page view.
90% efficient

Total waste: 1085 KB (10% of page weight)

Unused JS 1085 KB

0.25g unnecessary CO2 per visit

Actual transfer 10616 KB
Theoretical minimum 9531 KB
Potential savings 1085 KB (0.25g CO2)

See Deep Analysis sections above for specific optimizations.

C
Web Font Weight Variants
Action
13 font weights loaded across 5 famil(y/ies)
REVIEW
13 font weights loaded across 5 famil(y/ies)
Warning::
13 font weights loaded -- likely 100+ KB of unused payload
Loading 13 font weights typically transfers 200-400 KB just for fonts. Most pages legitimately use 2-3 weights (regular + bold, maybe medium). Audit which weights your stylesheet actually applies and trim the Google Fonts URL accordingly. Affected families: Cormorant, Inter, Kaisei Decol, Montserrat, Nunito Sans.
A+
Green Hosting
Green (both)
PASS
Green (both)
Info::
Both hosting and CDN use renewable energy
Got: Hosting: Cloudflare, CDN: Cloudflare
Info::
Cloudflare: 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 Cloudflare✓CDN Cloudflare✓

Cloudflare: 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 Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 107 KB (vs 10616 KB first visit). 479 of 485 resources are served from browser cache, saving 2.43g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 2.45g)
First visit
10616 KB
Repeat visit
107 KB

99% reduction on repeat visits

Saving 2.43g CO2 per returning visitor

479 resources served from cache · 6 resources re-downloaded

A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Image Optimization
151 images, 702 KB total, 429 KB wasted
INFO

Image Optimization Audit

Total Images

151

Total Size

702 KB

Oversized

20

Wasted

429 KB

77 missing dimensions 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.

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