.aspx
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.
6.2M
total files
1.1M
first seen 2021–2025 (17.5%)
2017
median year (half its files since)
Case variants in archive: .aspx (6.2M), .ASPX (323), .Aspx (271), .ASPx (3), .AspX (1) — aggregated above.
Attribution status
This extension is attributed to ASP; asp.net as primary by 2 authoritative claims.
Authoritative sources: △ Linguist · secondary ✓ Pygments ✓ Wikidata · Q344266 ✗ Wikipedia · no claim
Claimants (3)
Languages that list
.aspx among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| ASP | wikidata | primary |
| asp.net | pygments | primary |
| asp.net | linguist | secondary |
Wikidata says… (3)
File formats, image formats, audio codecs and other non-PL
entities that claim
.aspx 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 |
|---|---|---|---|---|---|
| ASP.NET Q178817 server-side web application framework | software framework; server-side scripting | — | — | — | Use as new PL ↗ |
| Microsoft ASP.NET Web Form Q105854286 file format | file format | — | — | — | Use as new PL ↗ |
| Microsoft ASP.NET Web Form (UTF) Q105854343 file format | file format | — | — | — | Use as new PL ↗ |
SWH-mined examples (0)
No archived examples for .aspx in our local mirror yet.