.jsx
2 claimants
1 primary
1 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.
128.9M
total files
100.6M
first seen 2021–2025 (78.1%)
2023
median year (half its files since)
Case variants in archive: .jsx (128.8M), .JSX (1.6K), .Jsx (1.0K), .jsX (341), .JSx (14), .jSX (6), .JsX (3), .jSx (2) — aggregated above.
Attribution status
This extension is attributed to JSX as primary by 2 authoritative claims.
Authoritative sources: △ Linguist · secondary ✓ Pygments ✓ Wikidata · Q11226532 ✗ Wikipedia · no claim
Claimants (3)
Languages that list
.jsx among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| JSX | pygments | primary |
| JSX | wikidata | primary |
| JavaScript | linguist | secondary |
Wikidata says… (2)
File formats, image formats, audio codecs and other non-PL
entities that claim
.jsx 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 |
|---|---|---|---|---|---|
| ExtendScript Q16976350 scripting language (an extension of JavaScript) and associated toolkit, developed by Adobe | programming language | — | — | — | Use as new PL ↗ |
| JavaScript Syntax Extension file Q137731716 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .jsx in our local mirror yet.