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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
RBF - Extension Details
Date Added: January 01, 1970
File Extension:  .RBF
Description 1: File extension .RBF stands for Retrospect Backup File. It is a backup set consisting of data that are backed up using the Retrospect backup program. RBF files contain actual files as well as folders that are backed up by the application Retrospect. Such files can be restored based on the info that is saved in the RBC backup catalog. Dantz software is the developer behind Retrospect. EMC Insignia is the new owner and distributor of the Retrospect program.
File Type:   Backup file
Mode: Binary
Program(s) to Open:  Mac and Windows: EMC Insignia Retrospect or Retrospect Express
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