.mask
2 claimants
2 primary
0 secondary
shared primary (2)
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.
174.2K
total files
39.8K
first seen 2021–2025 (22.8%)
2016
median year (half its files since)
Case variants in archive: .mask (174.0K), .Mask (154), .MASK (30), .mAsK (5) — aggregated above.
Attribution status
This extension is attributed to Mask; unity3d-asset as primary by 3 authoritative claims.
Claimants (4)
Languages that list
.mask among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Mask | linguist | primary |
| Mask | pygments | primary |
| unity3d-asset | pygments | primary |
| unity3d-asset | linguist | secondary |
Wikidata says… (1)
File formats, image formats, audio codecs and other non-PL
entities that claim
.mask 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 |
|---|---|---|---|---|---|
| Mask file format Q130280165 file format | file format | — | text/x-mask | — | Use as new PL ↗ |
Disambiguation rules (1)
Linguist heuristics that decide, by content, which language a
.mask file actually is.| Rule | Predicts | Kind | Predicates (truncated) | Measured on SWH |
|---|---|---|---|---|
h/linguist/.mask/0 | unity3d-asset | predicates | [{"kind": "any", "regexes": ["tag:unity3d.com"]}] |
SWH-mined examples (0)
No archived examples for .mask in our local mirror yet.