.arc

1 claimant 1 primary 0 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.

111.0K
total files
26.5K
first seen 2021–2025 (23.8%)
2015
median year (half its files since)

Case variants in archive: .arc (106.4K), .ARC (4.3K), .Arc (288), .arC (1) — aggregated above.

Attribution status

This extension is attributed to Arc as primary by 2 authoritative claims.

Authoritative sources: ✓ Linguist ✗ Pygments · no claim ✓ Wikidata · Q2438046 ✗ Wikipedia · no claim

Disagree or have a correction? Open a labelling issue.

Claimants (2)

Languages that list .arc among their extensions. Strength reflects whether the upstream source treated it as their primary extension.
LanguageSourceStrength
Arclinguistprimary
Arcwikidataprimary

Wikidata says… (13)

File formats, image formats, audio codecs and other non-PL entities that claim .arc 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.
Right entry isn't listed? Add manually ↗
FormatClass (Wikidata P31)Suggested labelMIMENotesAction
ARC Q296496
archive file format used on bulletin board systems
digital container format; file formatbinary:videoapplication/x-arc—Use as new PL ↗
ARC Q28600238
archive file format for the Commodore 64
file format———Use as new PL ↗
Devil May Cry 4 game data archive Q105854856
file format
file format—application/octet-stream—Use as new PL ↗

SWH-mined examples (1)

Real archived programs with this extension, byte-verified against the SWH archive, grouped by predicted language and by how the prediction was made. Useful for deciding what this extension actually is when the attribution is uncertain.
Arc (1) — 1 via unique-primary
search_spin.arc · 1969 B · seen 3× in SWH
predicted: Arc via unique-primary
swh:1:cnt:d98265132cb6666b9e92107dd3157174b9b77d1f;origin=https://github.com/delsuc/Gifa;anchor=swh:1:rev:87430699876841b9758a700f5a4ae382ff0ca9cb;path=/code/macro/att/search_spin.arc
Open in SWH · Raw bytes
Request more SWH-mined examples
If the examples above don't disambiguate what .arc is, request a fresh mining run.
(or open the pre-filled issue directly)