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The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
P3D - Extension Details
Date Added: December 10, 2008
File Extension:  .P3D
Description 1: Files with the .P3D extension are linked to the Peak3D 3D Graphics file. They have to do with threedimensional models created using the computer graphics 3D modeling program known as Peak3D. Both 2D and 3D images are supported by this application. Support is available for cameras and polygons, along with multiple lighting effects types.
File Type:   3D Image file
Mode: Binary
Program(s) to Open:  Windows: PeakWork Peak3D
Common:
Extension: