What is .PXM file extension?
Proprietary raster image format used by Pixelmator, an image editing program for Mac OS X; may include multiple layers, layer masks, color correction settings, and image metadata.
PXM is a lossless format that does not lose quality when saved. PXM files can be exported to more standard image formats within Pixelmator.
You can see a list of software programs here on easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.