C1W file format description

Many people share .c1w files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .c1w file can be edited, converted or printed with. On this page, we try to provide assistance for handling .c1w files.

1 filename extension(s) found in our database.

.c1w - Capture One Work Data

The C1W data files are related to Capture One. The C1W file is a Capture One Work Data. Capture One is a raw converter and photo editor that supports raw formats from more than 250 cameras and digital backs. C1W are work files that contain changes made during editing sessions in Capture One.

Capture One
Data files
- / -
Capture One Work Data related extensions:
Brother ScanNCut Data
Netscape Live 3D Data
Casio fx-9860G Add-in
MOBILedit Phone Driver
OLE DB Checkbook Data
WinSCP Temporary Data

Naturally, other applications may also use the .c1w file extension. Even harmful programs can create .c1w files. Be especially cautious with .c1w files coming from an unknown source!

Can't open a .c1w 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 .c1w file extension is often given incorrectly!

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

c1, c1d, c1s, clw, cw, cw1, cww, s1w

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

C1Report C1D Open XML Document
CardWorks Template
Sealed Word Document
Visual Studio ClassWizard Data
Clarion Source Code
Creeper World Game Map 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

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DataTypes.net >> C1W file