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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
T3001 - Extension Details
Date Added: January 01, 1970
File Extension:  .T3001
Description 1: The T3001 file extension is associated with the PCB (printed circuit board) design project that was created using TARGET 3001! It is CAD/CAE program software that is tasked with integrating schematics, layout, 3Dview and simulation data so they form one user interface. All these data are saved and stored into just a single T3001 project file.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: TARGET 3001!
Common:
Extension: