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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
2.39g CO2 per view
FIX
2.39g CO2 per view
Critical::
2.39g CO2 per page view
This page transfers 10.1 MB, producing an estimated 2.39g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.06g, network 0.49g, end-user device 1.83g.
Got: 2.39g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 286.4 kg CO2/year
With 10,000 page views per month, this page would generate approximately 286.4 kg of CO2 annually — equivalent to charging 35804 smartphones.
Info::
Green hosting reduces data center emissions

2.39g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 10.1 MB

Your site
2.39g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.06g
Network
0.49g
End-user device
1.83g
At 10,000 monthly views: Monthly: 23.9 kg · Annual: 286.4 kg · ≈ 35804 smartphone charges
F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.39g 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

2.39g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 298% more
vs Target 377% more
B
Transfer Efficiency
89% efficient
REVIEW
89% efficient
Info::
Transfer efficiency: 89%
An estimated 1094 KB (11%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 1094 KB of unused JavaScript. This wasted data produces 0.25g of unnecessary CO2 per page view.
89% efficient

Total waste: 1094 KB (11% of page weight)

Unused JS 1094 KB

0.25g unnecessary CO2 per visit

Actual transfer 10326 KB
Theoretical minimum 9232 KB
Potential savings 1094 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 10326 KB first visit). 469 of 475 resources are served from browser cache, saving 2.36g CO2 per repeat visit.
Info::
Repeat visit: 0.02g CO2 (first visit: 2.39g)
First visit
10326 KB
Repeat visit
107 KB

99% reduction on repeat visits

Saving 2.36g CO2 per returning visitor

469 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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