Home · Extensions · .asy

`.asy`

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.

116.6K

total files

37.8K

first seen 2021–2025 (32.4%)

2019

median year (half its files since)

Case variants in archive: .asy (116.5K), .ASY (88), .Asy (2) — aggregated above.

Attribution status

This extension is attributed to Asymptote; LTspice Symbol as primary by 4 authoritative claims.

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

Disagree or have a correction? Open a labelling issue.

Claimants (4)

Languages that list .asy among their extensions. Strength reflects whether the upstream source treated it as their primary extension.

Language	Source	Strength
Asymptote	linguist	primary
Asymptote	pygments	primary
LTspice Symbol	linguist	primary
LTspice Symbol	pygments	primary

Wikidata says… (2)

File formats, image formats, audio codecs and other non-PL entities that claim .asy 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 ↗

Format	Class (Wikidata `P31`)	Suggested label	MIME	Notes	Action
Asymptote file format Q128616565 file format	file format	—	`text/x-asymptote`	—	Use as new PL ↗
LTSpice Symbol Q105854349 file format	file format	—	`text/plain`	—	Use as new PL ↗

Disambiguation rules (2)

Linguist heuristics that decide, by content, which language a .asy file actually is.

Rule	Predicts	Kind	Predicates (truncated)	Measured on SWH
`h/linguist/.asy/0`	LTspice Symbol	predicates	`[{"kind": "any", "regexes": ["^SymbolType[ \\t]"]}]`
`h/linguist/.asy/1`	Asymptote	default	`[]`

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.

Asymptote (1) — 1 via default-rule

figlinescalarfield4_3D.asy · 2347 B · seen 32× in SWH

predicted: Asymptote via default-rule

swh:1:cnt:6e9e5de8c6ca1b1b217b505f0b8023a523101f39;origin=https://github.com/APEXCalculus/APEXCalculus_Source;anchor=swh:1:rev:fddeb9898bd913cec139bb5bfb54b5ddc05ca901;path=/figures/figlinescalarfield4_3D.asy

Open in SWH · Raw bytes