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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
ODT - Extension Details
Date Added: August 10, 2008
File Extension:  .ODT
Description 1: Files with the ODT extension refer to text documents created with the StarOffice and OpenOffice.org word processor. The OASIS OpenDocument XMLbased standard is used to format these files. Users can open and edit OpenDocument .ODT text files easily provided they have an OpenOfficecompatible software program installed. AbiWord (for Mac and Windows), KWord (for Unix) and NeoOffice (for Macs) are examples of such programs.
File Type:   Text file
Mode: ASCII
Program(s) to Open:  Windows: AbiSource AbiWord, IBM Lotus Notes 8 or later, Microsoft Word with OpenXML/ODF Translator Addin, OpenOffice.org Writer, Sun Microsystems Writer (included with StarOffice) Macintosh: AbiSource AbiWord, Apple TextEdit, IBM Lotus Notes 8 or later, NeoOffice Writer, OpenOffice.org Writer Unix: AbiSource AbiWord, IBM Lotus Notes 8 or later, KOffice KWord, OpenOffice.org Writer, Sun Microsystems Writer (included with StarOffice)
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