AP12 file format description

Many people share .ap12 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .ap12 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .ap12 files.

1 filename extension(s) found in our database.

Naturally, other applications may also use the .ap12 file extension. Even harmful programs can create .ap12 files. Be especially cautious with .ap12 files coming from an unknown source!

Can't open a .ap12 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.ap12

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 .ap12 file extension is often given incorrectly!

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

ap2, p12

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.ap2

ActivPrimary Resource

.p12

PKCS #12 Data File

.a12

ARJ Compressed Archive

.p12

Parity Archive V2

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

If you have useful information about the .ap12 file format, then write to us!