>> 12M file

12M file format description

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

1 filename extension(s) found in our database.

.wt4 - Lotus 1-2-3 Smartmaster Template

The WT4 document files are related to Lotus 1-2-3. The WT4 file is a Lotus 1-2-3 Smartmaster Template. Lotus 1-2-3 is a spreadsheet program designed for IBM-compatible personal computers by Lotus Corporation in 1982. The Lotus 1-2-3 seems to be no longer supported.

Lotus 1-2-3
Document files
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Lotus 1-2-3 Smartmaster Template related extensions:
Livetext Text Document
MindMaple Map Template
MindGenius v1 Document
Luxology Modo 3D Image
Hype Document Template
Music Write Score Document

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

Can't open a .12m 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 .12m file extension is often given incorrectly!

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

12, w2m

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Salt Lake 2002 Music Data
Solo Explorer Transcription

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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