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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
FBK - Extension Details
Date Added: November 03, 2009
File Extension:  .FBK
Description 1: .FBK file extension is linked with Family Tree Backup File. This is the fire extension for the backup file utilized/generated by Family Tree Maker an application that provides users an easier and organized way to preserve their familys genealogical information. It offers new interface that allows easy data entry, viewing and editing. It also has media features that allow easy management of photos and other media, a robust tool that helps users with sorting and managing of todolist, and timeline highlights of every member of your family since your ancestors. Family Tree Maker is owned and developed by The Generations Network Inc.
File Type:   Data file
Mode: ASCII
Program(s) to Open:  Windows & Mac: Family Tree Maker
Common:
Extension: