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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
SBN - Extension Details
Date Added: January 01, 1970
File Extension:  .SBN
Description 1: File extension .SBN is associated with ArcView spatial index for readwrite shapefiles. SBN files are binary spatial index files that are only utilized by ESRI program software. It has an undocumented format and other vendors do not implement it. The .SBN files are not considered completely necessary, given that the .SHP files contain all info required to parse spatial data successfully.
File Type:   Binary file
Mode: Binary
Program(s) to Open:  Associated application: ArcView
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