PSDX is a file extension that is given to images created by Adobe Photoshop Touch. This is a version of Photoshop designed for touchscreen devices. PSDX files store images created in the program, which can be up to 1600 x 1600 pixels in resolution, with a maximum of 16 layers. Most often, these files contain graphics made by hand.

PSDX files are also supported in the desktop versions of Photoshop, but the Adobe PS Touch plugin must be installed.