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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
ODM - Extension Details
Date Added: September 09, 2008
File Extension:  .ODM
Description 1: OpenOffice program software uses the .ODM extension. It refers to a global text document format that is based on the standard for the OASIS OpenDocument. ODM files are formatted in XML. Opening files with the ODM extension is not that difficult as many programs supporting the OpenDocument format can be used to do so.
File Type:   Text file
Mode: ASCII
Program(s) to Open:  Windows: OpenOffice.org Writer, Sun Microsystems StarOffice Macintosh: OpenOffice.org Writer
Common:
Extension: