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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
QBX - Extension Details
Date Added: January 01, 1970
File Extension:  .QBX
Description 1: File extension .QBX refers to accountant transfer files that are based on a QuickBooks firm .QBW file. A .QBX file is used in saving QuickBooks data in a format that is designed for tax preparers and accountants. Besides putting in General Journal notes, nothing else in the QBX file entries can be altered. Create Accountant Transfer Files by selecting "Accountants Review from the menu, choosing "Create Accountants Copy and saving the file.
File Type:   Backup file
Mode: Binary
Program(s) to Open:  Mac and Windows: Intuit QuickBooks
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