.co2
1 claimant
0 primary
0 secondary
SWH popularity
From the SWH-MSR-ARV dataset (Desmazières, Di Cosmo, Lorentz, MSR 2025; file nb_extensions_alphanum.csv) — one row per (ext, year) in the full SWH archive. Case-aggregated. citation.
5.1K
total occurrences
372
since 2019 (7.3%)
2009–2023
years active
Case variants in archive: .co2 (4.8K), .CO2 (307), .Co2 (1) — aggregated above.
Attribution status
This extension is attributed to Carbon — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim △ Wikidata · secondary ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.co2 among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Carbon | wikidata | deprecated |
SWH-mined examples (0)
No archived examples for .co2 in our local mirror yet.