.xlsx
1 claimant
0 primary
1 secondary
secondary-only
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.
19.0M
total files
12.3M
first seen 2021–2025 (64.4%)
2022
median year (half its files since)
Case variants in archive: .xlsx (19.0M), .XLSX (25.1K), .Xlsx (329), .xlsX (71), .XLSx (25), .XLsx (4), .XlSx (1), .XlsX (1), .xLsx (1) — aggregated above.
Attribution status
This extension is attributed to ooxml — every claim across all sources (including secondary ones) points to a single language.
Authoritative sources: ✗ Linguist · no claim ✗ Pygments · no claim △ Wikidata · secondary ✗ Wikipedia · no claim
Claimants (1)
Languages that list
.xlsx among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| ooxml | wikidata | secondary |
Wikidata says… (18)
File formats, image formats, audio codecs and other non-PL
entities that claim
.xlsx 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 |
|---|---|---|---|---|---|
| Microsoft Excel Q11272 spreadsheet editor, part of Microsoft 365 | spreadsheet; proprietary software | — | — | — | Use as new PL ↗ |
| Microsoft Office XML formats Q1727359 file format family introduced at Microsoft Office XP and Microsoft Office 2003 | file format family | — | — | — | Use as new PL ↗ |
| Office Open XML Q279979 family of document file formats mostly known for use with Microsoft Office 2007 and newer | file format family | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .xlsx in our local mirror yet.