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https://Retelit.it

Sustainability

· 8 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
60
GRADE
D
FIX
3
REVIEW
2
PASS
2
INFO
1
Device:
Mobile Desktop
Checks
8
2 PASS 2 REVIEW 3 FIX
F
CO2 Per Page Load
Action
2.08g CO2 per view
FIX
2.08g CO2 per view
Critical::
2.08g CO2 per page view
This page transfers 7.3 MB, producing an estimated 2.08g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.39g, network 0.36g, end-user device 1.34g.
Got: 2.08g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 249.7 kg CO2/year
With 10,000 page views per month, this page would generate approximately 249.7 kg of CO2 annually — equivalent to charging 31208 smartphones.

2.08g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 5% of websites

Sustainable Web Design model v4 · Page size: 7.3 MB

Your site
2.08g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.39g
Network
0.36g
End-user device
1.34g
At 10,000 monthly views: Monthly: 20.8 kg · Annual: 249.7 kg · ≈ 31208 smartphone charges
D
Green Hosting
Action
Unknown
FIX
Unknown
Info::
Hosting provider could not be identified
Without knowing the provider, we cannot determine their energy sourcing. Check with your hosting provider about their renewable energy commitments.
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 HostingUnable to Determine
Hosting Not identified✗CDN Not identified✗

Based on known provider commitments. Verify at thegreenwebfoundation.org

F
Carbon Budget
Action
95th percentile
FIX
95th percentile
Warning::
2.08g 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

2.08g

95th percentile

Cleaner than 5% of websites

✗ Above the median website

vs Median 247% more
vs Target 316% more
C
Web Font Weight Variants
Action
18 font weights loaded across 1 famil(y/ies)
REVIEW
18 font weights loaded across 1 famil(y/ies)
Warning::
18 font weights loaded -- likely 100+ KB of unused payload
Loading 18 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: Montserrat.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Repeat Visit Weight
98% cached
PASS
98% cached
Info::
98% reduction on repeat visits
Returning visitors download only 127 KB (vs 7523 KB first visit). 137 of 140 resources are served from browser cache, saving 2.05g CO2 per repeat visit.
Info::
Repeat visit: 0.04g CO2 (first visit: 2.08g)
First visit
7523 KB
Repeat visit
127 KB

98% reduction on repeat visits

Saving 2.05g CO2 per returning visitor

137 resources served from cache · 3 resources re-downloaded

A+
Transfer Efficiency
92% efficient
PASS
92% efficient
Info::
Transfer efficiency: 92%
Only 628 KB of potential savings identified. Your page is well-optimized for size.
92% efficient

Total waste: 628 KB (8% of page weight)

Unused JS 628 KB

0.17g unnecessary CO2 per visit

Actual transfer 7523 KB
Theoretical minimum 6894 KB
Potential savings 628 KB (0.17g CO2)

See Deep Analysis sections above for specific optimizations.

Image Optimization
40 images, 6411 KB total, 5074 KB wasted
INFO

Image Optimization Audit

Total Images

40

Total Size

6411 KB

Oversized

13

Wasted

5074 KB

16 missing dimensions 21 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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