What is a C01 file?
A .C01 file is a data or archive file that has multiple possible uses. The most common use is a Taxable Payments Annual Report created for the Australian Taxation Office. These files are usually exported from accounting software like MYOB AccountRight.
Another common use is the WinAce Split Archive Part 1 File format created by e-merge. Large compressed archives are often split into smaller files to make sharing easier. The sequence usually begins with .C00, followed by .C01, .C02, and so on.
Other software programs also use the .C01 extension. It can function as an Address database data file for Ordnance Survey AddressBase or AutoRoute Express. It can also act as a split Microsoft Access database file, a PROKON continuous beam design file, or a Typhoon Wave Audio File.
How to open C01 files?
Because the .C01 extension has multiple possible meanings, you must identify the file type first. viewer.online/c01 can analyze .C01 files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available.
If you confirm your file is a tax report, you need the original accounting software to read the data correctly. If your file is a WinAce Split Archive Part 1 File, you need file extraction tools like 7-Zip or WinRAR.
Best practices and troubleshooting
When handling split archives, you must keep all parts of the archive sequence in the exact same directory. When you tell your extraction software to open the base archive file, it will automatically locate and extract the .C01 file and the rest of the sequence.
We recommend file conversion to sensible target formats on convert.guru. Depending on the original file type, you can convert archive contents to .ZIP or export tabular data to .CSV.
Summary
viewer.online/c01 is useful for identifying, inspecting, and understanding .C01 files without installing software or dealing with compatibility problems.