Home · Extensions · .wat

`.wat`

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.

189.8K

total occurrences

104.1K

since 2019 (54.9%)

1970–2023

years active

Case variants in archive: .wat (189.1K), .WAT (681) — aggregated above.

Attribution status

This extension is attributed to WAT; WAT; WebAssembly as primary by 3 authoritative claims.

Authoritative sources: △ Linguist · secondary ✓ Pygments ✓ Wikidata · Q131994277 △ Wikipedia · secondary

Disagree or have a correction? Open a labelling issue.

Claimants (5)

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

Language	Source	Strength
WAT	pygments	primary
WAT	wikidata	primary
WebAssembly	pygments	primary
WebAssembly	linguist	secondary
WebAssembly	wikipedia	proposed

Wikidata says… (2)

File formats, image formats, audio codecs and other non-PL entities that claim .wat 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
Web Archive Transformation Q131994277 file format	file format	—	`—`	—	Use as new PL ↗
WebAssembly text format Q111051396 file format	file format	—	`—`	—	Use as new PL ↗

SWH-mined examples (2)

Real archived programs with this extension, byte-verified against the SWH archive. Useful for deciding what this extension actually is when the attribution is uncertain.

fac-multi-value.wat · 3005 B · seen 120× in SWH

predicted: unclassified via fallback

swh:1:cnt:d39353d8fae1f25692c551ff6c50a9416dee3c0e;origin=https://github.com/Lind-Project/lind-wasm;anchor=swh:1:rev:5be4c7e80c3ee5d5092e34edf4852f1d21893d24;path=/src/wasmtime/tests/disas/fac-multi-value.wat

Open in SWH · Raw bytes

multi-11.wat · 720 B · seen 120× in SWH

predicted: unclassified via fallback

swh:1:cnt:053e745d27b0e435d81d9de06db5311594dd65b0;origin=https://github.com/Lind-Project/lind-wasm;anchor=swh:1:rev:5be4c7e80c3ee5d5092e34edf4852f1d21893d24;path=/src/wasmtime/tests/disas/multi-11.wat

Open in SWH · Raw bytes