What is the DFN file format?
A file with the .DFN extension is a file known as Delphi Definition. It belongs to the Developer Files category. This format is associated with N/A.
The reliable way to open a .DFN file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .DFN files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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