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>> DFN file

DFN file format description

Many people share .dfn files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .dfn file can be edited, converted or printed with. On this page, we try to provide assistance for handling .dfn files.

1 filename extension(s) found in our database.

.dfn - Delphi Definition File

DFN file is a Delphi Definition File. Embarcadero Delphi is an integrated development environment (IDE) for console, desktop graphical, web, and mobile applications.

.dfn file format description:
DFN format description not yet available
Embarcadero Delphi
Development files
- / -
Delphi Definition File related links:
Delphi Definition File related extensions:
Borland Project Group
Borland Package Library
Delphi Component Package
Delphi Component Resource
Delphi Component Template
Delphi Compiled Unit

Naturally, other applications may also use the .dfn file extension. Even harmful programs can create .dfn files. Be especially cautious with .dfn files coming from an unknown source!

Can't open a .dfn file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .dfn file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

sfn, cfn, fn, dvn, drn, dgn, dfh, dfb, xfn, den, vfn, dbn, rfn, ffn, dtn

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Calamus Font Data
Kissock EModel Data Variables
Help and Manual eBook Template
Paradox Table Filter
Stronghold 3 Game Data
Racelogic PerformanceBox Binary Data

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If you have useful information about the .dfn file format, then write to us!