.pkl
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.
19.1M
total files
12.9M
first seen 2021–2025 (67.8%)
2022
median year (half its files since)
Case variants in archive: .pkl (19.1M), .PKL (3.4K), .pkL (62), .Pkl (11) — aggregated above.
Attribution status
This extension is attributed to Pickle; Pkl as primary by 2 authoritative claims.
Authoritative sources: ✓ Linguist ✗ Pygments · no claim ✗ Wikidata · no claim ✗ Wikipedia · no claim
Claimants (2)
Languages that list
.pkl among their extensions. Strength reflects whether the upstream source treated it as their primary extension.| Language | Source | Strength |
|---|---|---|
| Pickle | linguist | primary |
| Pkl | linguist | primary |
Disambiguation rules (2)
Linguist heuristics that decide, by content, which language a
.pkl file actually is.| Rule | Predicts | Kind | Predicates (truncated) | Measured on SWH |
|---|---|---|---|---|
h/linguist/.pkl/0 | Pkl | predicates | [{"kind": "any", "regexes": ["\\A[ \\t-\\r]*(?:(?://[^\\r\\n]*(?:\\r\\n?|\\n)|/\\*(?:[^*]|\\*+[^*/])*\\*+/)[ \\t-\\r]*)*(?:(?:module|import|amends|extends|class|typealias|function|external|abstract|op | |
h/linguist/.pkl/1 | Pickle | default | [] |
SWH-mined examples (0)
No archived examples for .pkl in our local mirror yet.