A12 File Extension

Split Multi-volume ARJ Compressed Format Archive is the complete format name for files with the A12 file extension. The Split Multi-volume ARJ Compressed Format Archive (part 14) format standard was created by ARJ Software, Inc. Programs for the Windows platform may be able to read files with the A12 extension. A12 files, like 619 other filename extensions in our database, are part of the Archive Files category.

Although ARJ32 is the most common tool for working with A12 files, users may pick from five alternative programs that handle this file type. ARJ Software, Inc. developed the ARJ32 software. Check out the developer’s official website for additional information about the program and A12 files.

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A12 File Extension Is Supported by the Following Programs.

The table below contains a list of programs that can open A12 files. A12 files may be copied to any mobile device or operating system platform, however, they may not open correctly on the destination machine.

How to Start:

The a12 file (for example, Avatar.a12) is only one element of the ARJ multi-volume archive. To extract this file, you’ll need all of the ARJ multi-volume archive sections. Open the first section of the ARJ multi-volume archive (for example, the Avatar.arj file) in the ARJ program and extract files from the ARJ multi-volume archive.

Step 1: Get ARJ32 and Install it.

The most common reason for users being unable to access A12 files is because they do not have an A12 file-opening tool installed on their machine. The simplest approach is to download and install ARJ32 or one of the tools recommended below: WinZip, 7-Zip, WinRAR. Using links supplied by authorized distributors is one of the safest ways to get the software. Download the installer from the ARJ32 website.

Step 2: Install the Most Recent Version of ARJ32.

Despite having ARJ32 installed on your machine, you are still unable to retrieve A12 file extension? Check to see whether the program is up to date. With updated versions of their products, software developers may offer new formats in lieu of those that are currently supported. It’s possible that this is one of the reasons why A12 files aren’t compatible with ARJ32. ARJ32’s most current version is backward compatible, meaning it can handle file formats that were supported by previous versions of the program.

Step 3: Make ARJ32 the Default Program for Opening A12 files.

If the issue remains after installing the newest version of ARJ32, set it as the default software for managing A12 file extension on your device. Although the technique of associating file formats with default apps varies by platform, the core approach is quite similar.

In Windows, selecting the first-choice program

Right-mouse clicks on the A12 file and chooses the Open with option from the file menu.

After that, choose Choose another app and then More apps to get a list of all accessible apps.

Finally, choose to Look for another software on this PC, go to the folder where ARJ32 is located, check the Always use this app to open the A12 files box, and click the OK button to confirm your choice.

In Mac OS, selecting the first-choice program

Select Information from the drop-down menu that appears when you right-click the file with the A12 extension.

If the Open with option isn’t visible, click the title.

Change for all choose ARJ32 and click Change…

This update will be implemented to all files with the A12 extension, according to the notification window. By clicking Continue, you are confirming your choice.

Step 4: Make Sure the A12 is in Good working-Order.

If the problem persists after following the directions in the preceding stages, you should double-check the A12 file in question. Problems opening the file might occur for a variety of reasons.

1. The A12 might be Contaminated with Malware; Use an Antivirus Application to Scan it.

It’s conceivable that if the A12 is contaminated, the virus is preventing it from opening. Scrutinize the file with an antivirus program right away, or scan the whole system to check that everything is secure. If the scanner detects that the A12 file is dangerous, follow the antivirus program’s instructions to eliminate the threat.

2. Make Sure the A12 File’s Structure Is Correct.

If you received the defective A12 file from a third party, request a replacement copy. Errors may arise during the file copy procedure, leaving the file incomplete or damaged. It’s possible that this is the cause of the file’s issues. An error may occur while downloading a file with the A12 extension from the internet, resulting in an incomplete file. Redownload the file if necessary.

3. Verify that the Person You’re Signed in has Administrative Rights.

It’s possible that only people with proper system rights will be able to access the file in question. Try opening the Split Multi-volume ARJ Compressed Format Archive (part 14) file again using an account that has the needed rights.

4. Verify that Your System is Capable of Handling ARJ32.

The operating systems may detect adequate free resources to launch the A12 file-supporting program. Close all open apps before attempting to open the A12 file.

5. Verify that Your Operating System and Drivers Are Up to Date.

The most recent versions of applications and drivers may help you solve issues with Split Multi-volume ARJ Compressed Format Archive (part 14) files and keep your device and operating system secure. It’s possible that the A12 files are compatible with newer software that fixes certain system flaws.

How to Do It:

Only one volume of the ARJ multi-volume archive may be converted. Only the whole ARJ archive may be converted to an other archive or compression format. The simplest approach to convert a multi-volume ARJ archive is to decompress it using ARJ or another compatible archiver and then repack the content with another compression or archive tool of your choice.

Problems with A12 files and how to fix them

Assign the A12 file extension to the appropriate program. Regarding:


Right-click any A12 file and choose “Open with” > “Choose another program” from the context menu. Now choose a different software and tick the option that says “Always use this app to open *.A12 files.”


Click “Open with” > “Other…” after right-clicking (or Ctrl-clicking) the A12 file. Then choose a different application and select the “Always Open With” option.


Choose another software by right-clicking on the file and selecting “Open with.”


Tap the file to open it. If no program appears to open the file, touch Share “Share” and choose an app. Save the file as an alternative. Then go to the Files app and open it. Long-press the file, then let go of your finger. A dark menu bar will appear. Then choose an app from the “Share” menu.


On your smartphone, hit the Settings button, then the Apps section. To change the default applications, press the Options icon in the upper right-hand corner of the screen.

Update any Program that isn’t Supposed to Open.

A12 is a multi-volume ARJ compressed file archive with split volumes (part 14). Because the newest A12 file format is only supported by the current version. As a result, look for an available on the ARJ Software, Inc. manufacturer website, for example.

Get your A12 file again and scan it with antivirus software to make sure it’s not damaged or virus-infected.

Conclusion – A12 File Extension

In conclusion, the A12 file extension is used for Split Multi-volume ARJ compressed file archives. If you’re having trouble opening an A12 file, make sure that you have the latest version of the software necessary to open it. Additionally, try scanning your file with antivirus software to see if it’s damaged or infected. If all else fails, you can try converting the A12 file to a different format.

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