.dfm

1 claimant 0 primary 1 secondary secondary-only

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.

1.0M
total occurrences
193.1K
since 2019 (19.0%)
1970–2023
years active

Case variants in archive: .dfm (1.0M), .DFM (6.2K), .Dfm (3), .dFm (1) — aggregated above.

Attribution status

This extension is attributed to Pascal — every claim across all sources (including secondary ones) points to a single language.

Authoritative sources: △ Linguist · secondary ✗ Pygments · no claim ✗ Wikidata · no claim ✗ Wikipedia · no claim

Disagree or have a correction? Open a labelling issue.

Claimants (1)

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

Wikidata says… (6)

File formats, image formats, audio codecs and other non-PL entities that claim .dfm 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 ↗
FormatClass (Wikidata P31)Suggested labelMIMENotesAction
C++ Builder Form file format family Q123693510
file format family
file format familyUse as new PL ↗
Borland Delphi - C++ Builder Form (var.1) Q105856239
file format
file formattext/plainUse as new PL ↗
Borland Delphi - C++ Builder Form (var.2) Q105855910
file format
file formattext/plainUse as new PL ↗

SWH-mined examples (1)

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.
frReservedCapsSettings.dfm · 1787 B · seen 54× in SWH
predicted: Pascal via fallback
swh:1:cnt:ef116707e31026d7f5c95a415b55a7cb1829cb67;origin=https://github.com/stokito/jedicodeformat;anchor=swh:1:rev:9c1c3f6c705d89b57e6d9286eabbdca1c956a221;path=/CodeFormat/Jcf2/Ui/Settings/frReservedCapsSettings.dfm
Open in SWH · Raw bytes
Request more SWH-mined examples
If the examples above don't disambiguate what .dfm is, request a fresh mining run.
(or open the pre-filled issue directly)