C03 file format description

Many people share .c03 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .c03 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .c03 files.

1 filename extension(s) found in our database.

.ace - WinAce Archive

The ACE archive files are related to WinAce. The ACE file is WinAce Archive. ACE is the native format of WinAce archiver. The WinAce seems to be no longer supported.

Archive files
- / -
c00, c01, c02, c03, c04, c05, c06, c07, c08, c09, c10
WinAce Archive related extensions:
WinAce Archive
WinAce Encrypted Archive

Naturally, other applications may also use the .c03 file extension. Even harmful programs can create .c03 files. Be especially cautious with .c03 files coming from an unknown source!

Can't open a .c03 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .c03 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

c3, cp3, d03, f03, s03, v03, x03

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

MicroSim PCBoard NC Drill Data
POV-Ray for Windows Scenes Advanced Newltpot Data
TD Scan Data
Jydivide Split
Grand Prix 3 Cockpit Shape
Corel WordPerfect Distribution Data

Operating systems

DataTypes.net currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.


If you have useful information about the .c03 file format, then write to us!

DataTypes.net >> C03 file