APJ file format description

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

1 filename extension(s) found in our database.

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

Can't open a .apj 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.apj

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 .apj file extension is often given incorrectly!

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

aj, zpj, wpj, pj, apn, apk, aph, ajp, xpj, qpj, apu, apm, api, ap

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

.aj

AspectJ Source Code

.wpj

Microsoft Works Project

.apk

Android Application Package

.ajp

JPEG2000 Digital Surveillance Recorder Video

.xpj

Micro Planner X-Pert Project

.apm

Alphacam Punch Param Macro

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