If you have a damaged Photoshop file, This will try to recover the image layers as PNG files. (Not all files can be recovered, although we try pretty hard. CMYK files are currently exported as separated plate files – PNG doesn't support CMYK.) Or quickly get image layers as PNG files, from any PSD This might be useful if have you have a PSD file but don't have Photoshop. (The Gimp might also help