.properties
2 claimants
1 primary
1 secondary
unambiguous primary
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.
38.6M
total occurrences
12.3M
since 2019 (31.8%)
1970–2023
years active
Case variants in archive: .properties (38.6M), .Properties (20.4K), .PROPERTIES (678), .propertieS (1), .propertIes (1) — aggregated above.
Attribution status
This extension is attributed to java-properties; java-properties as primary by 2 authoritative claims.
Claimants (3)
Languages that list
.properties among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| java-properties | linguist | primary |
| java-properties | pygments | primary |
| ini | linguist | secondary |
Wikidata says… (2)
File formats, image formats, audio codecs and other non-PL
entities that claim
.properties 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 |
|---|---|---|---|---|---|
| .properties Q1068805 file extension | file format; key–value database system | — | text/plain | — | Use as new PL ↗ |
| HSQLDB configuration Q105864879 file format | file format | — | — | — | Use as new PL ↗ |
Disambiguation rules (4)
Linguist heuristics that decide, by content, which language a
.properties file actually is.| Rule | Predicts | Kind | Predicates (truncated) |
|---|---|---|---|
h/linguist/.properties/0 | ini | predicates | [{"kind": "any", "regexes": ["^[^#!;][^=]*="]}, {"kind": "any", "regexes": ["^[;\\[]"]}] |
h/linguist/.properties/1 | java-properties | predicates | [{"kind": "any", "regexes": ["^[^#!;][^=]*="]}, {"kind": "any", "regexes": ["^[#!]"]}] |
h/linguist/.properties/2 | ini | predicates | [{"kind": "any", "regexes": ["^[^#!;][^=]*="]}] |
h/linguist/.properties/3 | java-properties | predicates | [{"kind": "any", "regexes": ["^[^#!][^:]*:"]}] |
SWH-mined examples (0)
No archived examples for .properties in our local mirror yet.