Capture One work data
File type: Various data file
Files with c1w file extension contain work data used by Capture One, a digital photo editing program for Windows.
File type category:
Various data file
Date updated: October 5, 2026
The c1w file extension is associated with Capture One, an imaging and photo-editing application for Microsoft Windows. Capture One was originally developed by Phase One and is now developed by Capture One.
A c1w file stores work data for Capture One. It is an application-specific data file rather than a standalone image, and is intended to be used together with the Capture One work from which it was created.
Open the c1w file with Capture One on Microsoft Windows. It may not open as an independent document, so keep it with the related Capture One work and open that work from within the application.
A c1w file is not normally converted directly because it stores Capture One work data rather than a standalone image. To create usable image files, open the related work in Capture One and use its export function to produce a supported image format.
Software applications that handle other tasks involving c1w files:
Microsoft Windows
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