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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
QBB - Extension Details
Date Added: January 01, 1970
File Extension:  .QBB
Description 1: File extension .QBB is short for QuickBooks Backup file. The QuickBooks money management program created this financial data backup file. Turn to QBB files to restore or recover the original data found on the primary .QBW file that was corrupted or deleted. Bear in mind that the .QBB file extension may have to be replaced with .QBW for the said file to open right in QuickBooks.
File Type:   Backup file
Mode: Binary
Program(s) to Open:  Mac and Windows: Intuit QuickBooks
Common:
Extension: