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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
HPC - Extension Details
Date Added: January 01, 1970
File Extension:  .HPC
Description 1: .HPC file extension is linked with HewlettPackard Font Language. This file is also utilized by Microsoft Windows CE Services such as ActiveSync when converting Pocket PC formats [PWI] and Windows formats [RTF]. Microsoft ActiveSync is an application that allows users to synchronize their phones with their PCs in order transfer files, information and settings.
File Type:   Font File
Mode: Binary
Program(s) to Open:  Windows: MS ActiveSync
Common:
Extension: