>> PDEF file

PDEF file format description

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

1 filename extension(s) found in our database.

.pdef - Protean Data Exchange Format Data

The PDEF data files are related to PDEF. PDEF file is a Protean Data Exchange Format Data. The Protean Data Exchange Format (PDEF) is a set of computer programs which can be used to transform data between different systems. The PDEF seems to be no longer supported.

Data files
- / -
Protean Data Exchange Format Data related extensions:
Firebird SQL Delta Data
Intuit Quicken Data
ACDSee Photo Disc Data
Microsoft Frontpage Navigation Bar Data
Microsoft Frontpage XML Data
pCon.planner 3dWeb Data

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

Can't open a .pdef 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 .pdef file extension is often given incorrectly!

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

def, pde, pdf, pef, pref

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Pathology Data Exchange File
AFP Page Definition
Arduino Old Sketch File
PowerDesk Encrypted File
C++ Definition File
ArcInfo Preferences Definition Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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