>> AR9 file

AR9 file format description

Many people share .ar9 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ar9 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ar9 files.

1 filename extension(s) found in our database.

.ar0 - MyDOS Ramdisk Image

The AR0 data files are related to MyDOS. The AR0 file is a MyDOS Ramdisk Image. MYDOS is an alternative DOS for Atari 8-bit computers. The MyDOS seems to be no longer supported.

Data files
- / -
ar1, ar2, ar3, ar4, ar5, ar6, ar7, ar8, ar9
MyDOS Ramdisk Image related extensions:
MyDOS Ramdisk Image

Naturally, other applications may also use the .ar9 file extension. Even harmful programs can create .ar9 files. Be especially cautious with .ar9 files coming from an unknown source!

Can't open a .ar9 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .ar9 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

ar, ari, aro, arp, at9

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Alphacam Router Post Data
Adobe Audition Replay Data
SteelArrow Web Application
Sony ATRAC9 Compressed Audio
Autodesk Simulation Mechanical Reaction Force Output
Midtown Madness 2 Game Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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If you have useful information about the .ar9 file format, then write to us!