.a00 — Archive File
Robert K. Jung · 1990
A segment of a larger, split archive file, requiring all parts to be reassembled.
Key Features
- Part of a split archive
- Sequential numbering indicates order
- Requires all parts for extraction
- Commonly associated with older archiving tools
Best For
- Breaking large archives into manageable chunks
- Distributing files via older media like floppy disks
- Ensuring compatibility with legacy archiving software
Less Ideal For
- Modern large file sharing where cloud services are available
- Single, self-contained archive needs
- Archiving that requires strong modern compression algorithms
- Applications that don't support split archives
Common Use Cases
- Distributing large files across multiple floppy disks
- Sending large files via email when size limits apply
- Archiving large datasets that exceed single-file limits
- Preserving historical software distributions
How to Open It
- Ensure all sequential parts (.a00, .a01, etc.) of the archive are downloaded to the same folder.
- Use an archive utility like 7-Zip, WinRAR, or PeaZip that supports multi-part archives.
- Open the first file in the sequence (e.g., the .a00 file) with the chosen utility.
- The utility should automatically detect and process the subsequent parts to extract the original content.
What is a .a00 file?
The .a00 file extension typically represents a split or multi-part archive file. These archives are created when a single archive is too large to be stored or transmitted as one piece. The original archive is broken down into smaller segments, each with a sequential file extension like .a00, .a01, .a02, and so on. To use the files contained within, all parts must be present and in the correct order, and then opened with an archive utility that supports split archives. This method was common for distributing large files before widespread high-speed internet access.
Programs That Open .a00 Files
| Platform | Program | ||
|---|---|---|---|
| Windows | 7-Zip | Free | Official |
| WinRAR | Paid | Official | |
| PeaZip | Free | Official | |
| macOS | The Unarchiver | Free | |
| Keka | Paid | Official | |
| Linux | 7-Zip (p7zip) | Free | Official |
| PeaZip | Free | Official | |
| Android | RAR | Paid | Official |
| ZArchiver | Free | ||
| iOS | iZip | Free | |
| Documents by Readdle | Free |
How to Convert .a00 Files
| Format | Method |
|---|---|
| .ZIP | Extract all parts, then re-archive as ZIP using 7-Zip or WinRAR |
| .RAR | Extract all parts, then re-archive as RAR using WinRAR |
Common Problems with .a00 Files
Frequently Asked Questions
A split archive is a single archive file that has been divided into multiple smaller parts. This is typically done to make it easier to transfer large files, especially on older systems with size limitations.
Yes, you need archive software that supports multi-part or split archives, such as 7-Zip, WinRAR, or PeaZip. Crucially, you must have all the sequential parts of the archive available.
While you initiate the opening process with the .a00 file, your archive software will need to access all subsequent parts (.a01, .a02, etc.) to successfully reconstruct and extract the original contents.
Technical Details
The .a00 file is not a standalone archive format but rather a segment of a larger archive that has been divided. It's often associated with older archiving tools like ARJ, where files exceeding a certain size limit were split into sequentially numbered parts. To reconstitute the original archive, all sequential parts (.a00, .a01, etc.) must be present and processed by compatible decompression software.