Convert A13 to 7-ZIP

Understanding a13 and 7-zip file formats

A13 files are typically part of a multi-volume archive created by the ARJ archiver. These files are not standalone archives but segments (e.g., .a00, .a01, ..., .a13) of a larger compressed set. To access the contents, you need all parts of the archive and the ARJ extraction tool.

7-Zip files (with the .7z extension) are compressed archives created by the popular 7-Zip utility. The 7z format is known for its high compression ratio and support for strong encryption and multiple compression algorithms.

How to convert a13 to 7-zip

Direct conversion from .a13 to .7z is not possible because .a13 is only a segment of a split archive. The correct process involves first extracting the complete archive and then recompressing the extracted files into a .7z archive.

Step-by-step conversion process

1. Gather all ARJ archive parts (e.g., .arj, .a00, .a01, ..., .a13) in the same folder.
2. Extract the archive using a tool that supports ARJ, such as 7-Zip or WinRAR:
   • Open 7-Zip File Manager.
   • Navigate to the folder with your ARJ parts.
   • Right-click the main .arj file and select Extract Here or Extract to <folder>.
3. Compress the extracted files to 7z:
   • Select the extracted files or folder.
   • Right-click and choose 7-Zip → Add to archive....
   • Set Archive format to 7z and configure other options as needed.
   • Click OK to create your .7z file.

Recommended software for conversion

• 7-Zip (Windows, free, 7-zip.org): Handles both ARJ extraction and 7z compression.
• WinRAR (Windows, trial, win-rar.com): Supports ARJ and 7z formats.

Summary

To convert an .a13 (ARJ split archive part) to .7z, you must first extract the complete ARJ archive using all its parts, then recompress the extracted files into a 7z archive using 7-Zip or WinRAR.