A20 file format description

Many people share .a20 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .a20 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .a20 files.

1 filename extension(s) found in our database.

.arj - ARJ Compressed Archive

The ARJ archive files are related to WinARJ. ARJ file is an ARJ Compressed Archive. It is the native format of ARJ (dos) and WinARJ archiver. Like other archives, ARJ files are data containers, they store one or several files in the compressed form.

Application:

WinARJ

Category:

Archive files

Mime-type:

application/x-arj-compressed

Magic:

- / -

Aliases:

a00, a01, a02, a03, a04, a05, a06, a07, a08, a09, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, a21, a22, a23, a24

ARJ Compressed Archive related extensions:

.arj: ARJ Compressed Archive

Naturally, other applications may also use the .a20 file extension. Even harmful programs can create .a20 files. Be especially cautious with .a20 files coming from an unknown source!

Can't open a .a20 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:

example.a20

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.

Open Control Panel > Control Panel Home > Default Programs > Set Associations.
Select a file type in the list and click Change Program.

The .a20 file extension is often given incorrectly!

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

a02, a2p, x20

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.x20: XTreeGold for Dos Help Data
.a2p: Adlib Tracker II Pattern File
.a02: ARJ Compressed Archive

Operating systems

DataTypes.net 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

If you find the information on this page useful, please feel free to link to this page.

https://datatypes.net/open-a20-files

If you have useful information about the .a20 file format, then write to us!

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