.fr
3 claimants
1 primary
2 secondary
unambiguous primary
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.
162.5K
total files
20.0K
first seen 2021–2025 (12.3%)
2017
median year (half its files since)
Case variants in archive: .fr (160.0K), .FR (2.4K), .Fr (27) — aggregated above.
Attribution status
This extension is attributed to Frege as primary by 2 authoritative claims.
Authoritative sources: ✓ Linguist ✗ Pygments · no claim ✓ Wikidata · Q5501320 ✗ Wikipedia · no claim
Claimants (4)
Languages that list
.fr among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Frege | linguist | primary |
| Frege | wikidata | primary |
| Forth | linguist | secondary |
| Text | linguist | secondary |
Wikidata says… (1)
File formats, image formats, audio codecs and other non-PL
entities that claim
.fr 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 |
|---|---|---|---|---|---|
| Finalburn Alpha movie capture Q105855292 file format | file format | — | application/octet-stream | — | Use as new PL ↗ |
Disambiguation rules (3)
Linguist heuristics that decide, by content, which language a
.fr file actually is.| Rule | Predicts | Kind | Predicates (truncated) | Measured on SWH |
|---|---|---|---|---|
h/linguist/.fr/0 | Forth | predicates | [{"kind": "any", "regexes": ["^(: |also |new-device|previous )"]}] | |
h/linguist/.fr/1 | Frege | predicates | [{"kind": "any", "regexes": ["^\\s*(import|module|package|data|type) "]}] | |
h/linguist/.fr/2 | Text | default | [] |
SWH-mined examples (0)
No archived examples for .fr in our local mirror yet.