A18 File Extension
Split Multi-volume ARJ Compressed Format Archive (part 20)
- File Type a18
- Developer ARJ Software, Inc.
- Popularity
- Application ARJ32
- Category Compressed Files
What is a A18 file?
Split Multi-volume ARJ Compressed Format Archive (part 20), identified by the A18 extension, is a Compressed Files type and includes 820 files.
The Split Multi-volume ARJ Compressed Format Archive (part 20) (A18) was created by ARJ Software, a company that developed file format and produced 2 programs for their use.
A18 files are compatible with various operating systems, including Windows. If you need to extract a A18 file, you can use one of 5 programs, such as ARJ32, WinZip and 7-zip.
How to open a A18 file?
If you’re having difficulty opening a A18 file, it is often due to not having the correct software. To solve the problem, choose a compatible program from the list. Then follow the link to the official developer site, download the software, and install it on your device.
ARJ32, WinZip and 7-zip are recognized as the most popular software solutions for dealing with A18 files. To install the most up-to-date edition of ARJ32, visit the official ARJ Software website. You can download the build that works across all operating systems.
After successful installation, your operating system should seamlessly handle A18 files via ARJ32.
Set ARJ32 as your default A18 viewer
Setting a default program by file type in Windows
- Right-click your A18 file, then navigate to the "Open With" option and click "Choose Another Application" to continue;
- From the list of applications in the pop-up window, find and select ARJ32 as your desired application;
- Check the "Always use this app" checkbox, and then click "OK" to set your chosen app as the default for opening A18 files.
Set default app to open files on Mac
- Right-click or Control + left-click on the desired A18 file to open a menu of available actions;
- Select "Open in application" and click "Other";
- Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
- Select "All Programs" from this menu and proceed to search for ARJ32. Check the box next to "Always open in app" to set it as the default option.
How to edit a A18 file?
Editing A18 files requires installing professional software that lets you open and edit compressed files. Online editors have more limitations compared to dedicated Split Multi-volume ARJ Compressed Format Archive (part 20) programs.
List of Top A18 editors 2026
With the mentioned criteria in mind, we have assembled a selection of A18 editors.
| A18 Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| ARJ32 | ARJ Software | Windows | 4.2 out of 5 (39 reviews) |
Solving Common A18 File Challenges
A18 files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.
Are there any techniques or tools available to repair a damaged A18 file?
Open the damaged A18 file with a recovery program, and then select the "Repair" menu item to start the repair process. Wait for the recovery process to finish, as it will automatically repair damaged compressed files.
What are the telltale signs of a corrupt A18 file?
Corrupted A18 compressed files may show the following signs:
- Unexpected expansion of the total size of the A18 file;
- Opening or processing the file in ARJ32 or other programs causes instability or crashes in the program;
- The file shows errors when trying to open it or does not open completely;
- While working with the file, error messages appear;
- Editing the archive in ARJ32 is accompanied by slow performance or delays;
What factors contribute to ARJ32 crash?
ARJ32 crashes can occur due to outdated software versions. To mitigate this, install the latest updates for ARJ Software products.
A simple restart of your computer can often fix many common problems, which is why it is the recommended first step before making any adjustments to your software settings.