How to open 12M file extension?

The author of advice: Mr Brankiewicz

12M files are incessantly popular. However, a file name containing 12M file extension is problematic for some of the users. They have problems with correct opening of a file with 12M extension. However, it should be remembered that 12M file extension can match one or more types of files. The most popular is Lotus Smartmaster but if there are others, you will find information concerning them below.

So, it is worth looking close at the problem concerning 12M files and search for its solution.

A list of programs supporting files types with 12M extension can be found below. Applications are sorted according to appropriate operational systems and their popularity.

  • Lotus Smartmaster

    .12m file extension

    Category: Various Files

    OS Software
    Windows Lotus 1-2-3 Lotus 1-2-3

How to check if a file we want to open is not infected by malware or viruses?

  • Download Malware/viruses removal tool from 12M files in the Windows system.
  • Click “Start scanning” and wait until the programme performs the scanning process on your computer.

What are the reasons of errors concerning 12M extension of files?

The problem that often causes damage concerning 12M extension are Windows system registry errors. That is why, in the first place it is recommended to:

  • Scan computer in order to identify, repair and open the 12M file
  • Check system registry from the angle of hidden errors
  • Repair file’s associations with programs in the system registry

If you are not sure if the above problems concern you, you should consider other frequent irregularities:

  • You do not have an appropriate application installed that supports 12M file extension
  • 12M file is corrupted
  • The application’s version necessary to open the file is not correct
  • The file is not assigned to an appropriate program

Solving problems with 12M files


If 12M file does not open, firstly, it is worth using files associations built in the Windows system with application that can support them. In order to do it, you should double-click a 12M file icon. A list of programs that probably support such a file will appear. It is enough to choose one of them so that Windows would open a given extension with it. Incorrect file’s association will result in Windows trying to open 12M file with a wrong program all the time even if there is an appropriate application supporting this format on a drive. In this case, it is necessary to perform the above mentioned registry scanning and associations’ repair.

If associations are correct and Windows still cannot open the file, most probably the computer does not have appropriate software supporting files with name containing 12M in their extension. The solution to this problem is very simple. You should buy or download a free (if they exist) application that will allow you to open, browse and edit 12M format. It is no risk because many paid programs have free test versions enabling to check their functionality.

Do you have extra information about a 12M file? [ Add information about a 12M file ]

5 564

of file extensions

8 858

of file types

5 504

of applications opening the files

1 661

of producers