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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
YWP - Extension Details
Date Added: May 03, 2009
File Extension:  .YWP
Description 1: .YWP is the extension linked with the yWriter Project. yWriter is the novel writing freeware program. It lets users break their books into scenes and chapters. The yWriter application is also able to track progress through "status flags that users can apply to every scene including outline, draft, first (1st) edit, second (2nd) edit, or done.
File Type:   Document file
Mode: Binary
Program(s) to Open:  Open with yWriter Project program
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