12O file format description

Many people share .12o files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .12o file can be edited, converted or printed with. On this page, we try to provide assistance for handling .12o files.

1 filename extension(s) found in our database.

Naturally, other applications may also use the .12o file extension. Even harmful programs can create .12o files. Be especially cautious with .12o files coming from an unknown source!

Can't open a .12o 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.12o

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 .12o file extension is often given incorrectly!

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

12

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.12

Salt Lake 2002 Music Data

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.

If you have useful information about the .12o file format, then write to us!