.PSF ファイル拡張子

a PSF file is a Preference File that stores various color settings. Photoshop uses it to preview how images will look when printed accurately. You can download this file by choosing View → Validation Settings → Custom in Photoshop. This extension is also used in other formats, such as audio or scripts.

Your PSF file may be a Photoshop Proof Settings file. The PSF file extension may also be used by other programs, such as a GPS Prediction Support file, a Portable Sound file, a PID Script file, an AutoCAD PostScript Script file, or an HP-UX Product Specification file.

More information

There are many sources for your file. PFS is one example of the same letters used in the PSF file extension. But this file is used by PhotoFiltre Studio for saved selection files. It's essential first to understand what the file you want is used for before you can understand how to convert it.

You cannot convert an Adobe settings file to any other usable format. You can only open it using its native application, i.e., Adobe Photoshop or Adobe Photoshop Elements.