Extract text from split archives (A01)
To convert A01 archives to another format, you need ALZip or other Compressed software.
To convert other file formats to the "Split Archive File" file type, you need software like ALZip or a similar tool.
The .a01 file extension is a heavily overloaded format. It primarily functions either as a secondary chunk of a split compressed archive or as proprietary financial data. In the context of archiving, utilities like ALZip and ARJ split large archives into smaller, numbered volumes to fit on external media or bypass email attachment limits. In this sequence, the .a01 file is the second volume (following the base alz, arj, or a00 file). Alternatively, .a01 is used for accounting and tax data, most notably by Sage ACCPAC, Tally ERP 9, and the Australian Taxation Office (ATO) for EMPDUPE (Employee Payment Duplicate) reports. It is also found in specialized hardware logs, such as Ross-Tech VCDS automotive diagnostics and Mortara ECG machines.
The main disadvantage of an .a01 file is its extreme fragmentation. If it is a split archive, the file is entirely useless on its own; it is just a truncated chunk of binary data that cannot be extracted without the rest of the sequence. If it is a financial data file, it suffers from severe vendor lock-in. You typically need an active, expensive software license for legacy ERP systems to read the data, and standard web browsers or generic applications cannot process it natively.
To overcome these limitations, conversion or extraction is required. For split archives, the goal is to extract the contents into a standard, uncompressed format or a universal ZIP file. For financial data or hardware logs, converting to CSV for spreadsheet analysis or PDF for archiving is the most practical workaround.
Convert.Guru analyzes your A01 file, detects the exact format, and lets you read the text inside.
Users also converted A00, ARJ, ZOO and ALZ files.
If you want to convert A01 file to ZIP, RAR, 7Z, TAR, GZ, BZ2, XZ, LZMA, CAB, ACE, ARJ or LHA, you can use ALZip or similar software from the "Split Archive or Financial Data" category. In the File menu, look for Save As… or Export….
To convert XXE, 7Z, Z, PAK, LHA, DEB, UUE, TAR, LZH, ZIP, PKG or RAR files to A01, try ALZip or another comparable tool in the "Split Archive or Financial Data" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our A01 converter.