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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
ODS - Extension Details
Date Added: January 01, 1970
File Extension:  .ODS
Description 1: .ODS is short for OpenDocument Spreadsheet. It is a file extension that is tied to a spreadsheet that Calc application program created with the opensource office suite OpenOffice.org or StarOffice. ODS files store the data in columns and rows. They are formatted through the OASIS OpenDocument standard that is XMLbased.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows: Microsoft Excel with OpenXML/ODF Translator Addin, OpenOffice.org Calc, Sun Microsystems Calc (part of StarOffice) Macintosh: OpenOffice.org Calc Unix: OpenOffice.org Calc, Sun Microsystems Calc (part of StarOffice)
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