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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
WORKFLOW - Extension Details
Date Added: April 02, 2009
File Extension:  .WORKFLOW
Description 1: .WORKFLOW is the extension tied to the Automator Workflow. It essentially refers to the automated workflow that the Apple Automator application, which was launched in Mac OS X 10.4, creates. A .WORKFLOW file features a commands list for automating processes. Such commands include PDF file saving and mailing, and other files selection and copying.
File Type:   Executable file
Mode: Binary
Program(s) to Open:  Mac: Apple Automator
Common:
Extension: