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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
PC6 - Extension Details
Date Added: January 01, 1970
File Extension:  .PC6
Description 1: File extension .PC6 is associated with the PowerCADD 6 Drawing File. The .PC6 extension is attached to drawing files created using the Macintosh CAD application known as PowerCADD 6. PC6 files usually contain floor plans, 2D drawings, architectural designs and machinery assemblies. Although PowerCADD may not attach the .PC6 extension by default, it is fine for users to add it themselves.
File Type:   Vector Image file
Mode: Binary
Program(s) to Open:  Macintosh: Engineered Software PowerCADD 6
Common:
Extension: