.c
5 claimants
4 primary
1 secondary
shared primary (4)
SWH popularity
Distinct files in the full Software Heritage archive (2026-06-04 export), dated by first appearance, following Desmazières, Di Cosmo, Lorentz (MSR 2025). Case-aggregated. citation.
209.3M
total files
76.8M
first seen 2021–2025 (36.7%)
2019
median year (half its files since)
Case variants in archive: .c (205.1M), .C (4.2M) — aggregated above.
Attribution status
This extension is attributed to C; C (programming language); C++; Objective-C as primary by 6 authoritative claims.
Claimants (8)
Languages that list
.c among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| C | linguist | primary |
| C | pygments | primary |
| C | wikidata | primary |
| C (programming language) | pygments | primary |
| C++ | wikidata | primary |
| Objective-C | wikidata | primary |
| C++ | pygments | secondary |
| cpp | pygments | secondary |
Wikidata says… (6)
File formats, image formats, audio codecs and other non-PL
entities that claim
.c on Wikidata
(property P1195) or in the Wikipedia infobox.
Source: data/derived/external_extension_index.csv.
Click Use as new PL on any row to open the
Add-PL form pre-filled with that entry's name, Wikipedia/Wikidata
URL, and this extension — one submission creates the PL + claim.
| Format | Class (Wikidata P31) | Suggested label | MIME | Notes | Action |
|---|---|---|---|---|---|
| class implementation file Q5128020 file containing source code that implements methods declared in a corresponding header file | — | — | — | Use as new PL ↗ | |
| C source code file Q111431164 file format | file format | — | — | — | Use as new PL ↗ |
| C++ source code file Q111417227 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .c in our local mirror yet.