Skip to content
https://conviva.com

Sustainability

· 6 checks — CO2 emissions, green hosting, repeat-visit weight, carbon budget, and transfer efficiency rolled into one auditable list.
SCORE
73
GRADE
C
FIX
2
REVIEW
2
PASS
2
INFO
0
Device:
Mobile Desktop
Checks
6
2 PASS 2 REVIEW 2 FIX
D
CO2 Per Page Load
Action
1.28g CO2 per view
FIX
1.28g CO2 per view
Warning::
1.28g CO2 per page view
This page transfers 5.4 MB, producing an estimated 1.28g of CO2 per visit using the Sustainable Web Design model (v4). Breakdown: data center 0.03g, network 0.26g, end-user device 0.98g.
Got: 1.28g CO2 Expected: < 0.50g (sustainability target)
Info::
At 10,000 monthly views: 153.1 kg CO2/year
With 10,000 page views per month, this page would generate approximately 153.1 kg of CO2 annually — equivalent to charging 19143 smartphones.
Info::
Green hosting reduces data center emissions

1.28g

Carbon Footprint per page view

✗ Above sustainability target (0.50g)

Cleaner than 31% of websites

Sustainable Web Design model v4 · Page size: 5.4 MB

Your site
1.28g
Top 10%
0.20g
Target
0.50g
Median website
0.60g

Energy Breakdown

Data center
0.03g
Network
0.26g
End-user device
0.98g
At 10,000 monthly views: Monthly: 12.8 kg · Annual: 153.1 kg · ≈ 19143 smartphone charges
D
Carbon Budget
Action
69th percentile
FIX
69th percentile
Warning::
1.28g CO2 — above the median website (0.60g)
Heavier than an estimated 31% of websites. Reducing page weight, optimizing images, and removing unused JavaScript would lower the carbon footprint. See the Performance tab.
Info::
Estimated 69th percentile
Compared to: top 10% = 0.20g, target = 0.50g, median = 0.60g per page view.
Top 10%
Target
Median website

1.28g

69th percentile

Cleaner than 31% of websites

✗ Above the median website

vs Median 113% more
vs Target 155% more
B
Transfer Efficiency
87% efficient
REVIEW
87% efficient
Info::
Transfer efficiency: 87%
An estimated 719 KB (13%) could be eliminated: 0 KB via better compression, 0 KB via modern image formats, 719 KB of unused JavaScript. This wasted data produces 0.17g of unnecessary CO2 per page view.
87% efficient

Total waste: 719 KB (13% of page weight)

Unused JS 719 KB

0.17g unnecessary CO2 per visit

Actual transfer 5521 KB
Theoretical minimum 4801 KB
Potential savings 719 KB (0.17g CO2)

See Deep Analysis sections above for specific optimizations.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Green Hosting
Green (cdn)
PASS
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 Weight
99% cached
PASS
99% cached
Info::
99% reduction on repeat visits
Returning visitors download only 54 KB (vs 5521 KB first visit). 130 of 133 resources are served from browser cache, saving 1.26g CO2 per repeat visit.
Info::
Repeat visit: 0.01g CO2 (first visit: 1.28g)
First visit
5521 KB
Repeat visit
54 KB

99% reduction on repeat visits

Saving 1.26g CO2 per returning visitor

130 resources served from cache · 3 resources re-downloaded

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback