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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
PCM - Extension Details
Date Added: January 01, 1970
File Extension:  .PCM
Description 1: The PCM file extension is linked to the Pulse Code Modulation file type. This kind of file deals with uncompressed audio formats. Most PCM format files are stored in files with the .WAV or .AIF extension. The raw digital audio files are direct representations of the digital sample values ranging from 1s to 0s of a particular audio sound recording.
File Type:   Audio/Music File
Mode: Binary
Program(s) to Open:  Windows: Apple QuickTime Player, Cool Edit Pro, Adobe Audition Macintosh: Apple QuickTime Player
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