Convert A13 to 7-Z

Understanding the a13 and 7-z file formats

A13 files are typically associated with split archive parts created by the ARJ archiver. When large files are compressed and split into multiple volumes, each part is given a sequential extension such as .a01, .a02, ..., .a13. These files are not standalone archives but segments of a larger compressed set.

7-Z files refer to the 7z format, a popular compressed archive format developed by 7-Zip. 7z files offer high compression ratios and support for strong encryption, making them a preferred choice for efficient file storage and transfer.

How to convert a13 to 7-z

To convert an a13 file (as part of an ARJ split archive) to a 7z archive, you must first reconstruct the original file from all ARJ parts. Once the complete file is extracted, you can then compress it into a 7z archive.

Step-by-step conversion process

1. Gather all ARJ parts (e.g., .arj, .a01, .a02, ..., .a13) in the same folder.
2. Use WinRAR or 7-Zip to extract the archive:
   Right-click the .arj file → Extract Here (ensure all parts are present).
3. After extraction, you will have the original file or folder.
4. To create a 7z archive, use 7-Zip:
   Right-click the extracted file/folder → 7-Zip → Add to archive... → Archive format: 7z → OK.

Recommended software for conversion

• 7-Zip (free, open-source, Windows/Linux): Handles both ARJ extraction and 7z compression.
• WinRAR (trialware, Windows): Can extract ARJ split archives and create 7z files via 7-Zip integration.

Key points to remember

• A13 files are not standalone archives; you need all parts to extract the original data.
• 7z format offers better compression and security for your files.
• Always use reliable software like 7-Zip for best results.