What is a .COF file?
COF is a Capture One settings file accompanying a raw photo. Created by Capture One.
- Did you know
- Capture One comes from Phase One, the Danish maker of medium-format cameras, and began life as companion software for its high-end digital backs.
- Despite sitting beside the raw photo, a COF actually stores the focus-mask data Capture One uses, not the image edits themselves.
- Capture One keeps these sidecars in a hidden CaptureOne subfolder and never touches the original raw, working entirely by proxy.
- What Analyser reads
- Identify camera RAW edit sidecars - Apple Photos adjustments (AAE), RawTherapee (PP3), Capture One (COS), DxO PhotoLab (DOP) and Nikon NX Studio (NKSC) - reading the applied-edit recipe, plus cinema and rare camera RAW: REDCODE (R3D), Blackmagic (BRAW), Canon Cinema RAW Light (CRM), ARRIRAW (ARI), Phantom CINE and FLIR thermal (FPF).
- Depth of analysis
- .COF is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .COF file
- Drag a .COF file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.