.proto
2 claimants
2 primary
0 secondary
shared primary (2)
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.
2.4M
total occurrences
1.2M
since 2019 (48.8%)
1970–2023
years active
Case variants in archive: .proto (2.4M), .Proto (273), .PROTO (42) — aggregated above.
Attribution status
This extension is attributed to MIT Proto; Protocol Buffer; Protocol Buffer as primary by 3 authoritative claims.
Claimants (3)
Languages that list
.proto among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| MIT Proto | pygments | primary |
| Protocol Buffer | linguist | primary |
| Protocol Buffer | pygments | primary |
Wikidata says… (1)
File formats, image formats, audio codecs and other non-PL
entities that claim
.proto 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 |
|---|---|---|---|---|---|
| Protocol Buffers Q1645574 data serialization format | free software; file format | — | application/protobuf; application/vnd.google.protobuf | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .proto in our local mirror yet.