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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:
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ZS9 - Extension Details
Date Added: May 03, 2009
File Extension:  .ZS9
Description 1: File extension .ZS9 has to do with the ZSNES Slot 9 Save State. ZSNES is the Super Nintendo emulator that is programmed by the application zsKnight and_Demo_. The ZNES project was "GPLed on April 2, 2001, with its source launched and released to the general public. The .ZS9 file format is currently able to run on FreeBSD, Windows, DOS and Linux.
File Type:   Game file
Mode: Binary
Program(s) to Open:  Open with ZSNES Slot 9 Save State program Associated links: Emulator Zone, Sourceforge ZSNES Project Page
Common:
Extension: