PXD - Pixelmator Pro
Pixelmator Pro is a popular image editor for macOS, available from the Mac App Store. It saves documents in its own PXD format.
What File Juicer can extract from PXD files
File Juicer can extract the images stored inside a PXD file, including JPEG, PNG and WebP images embedded in the document.
Opening PXD files without Pixelmator Pro
PXD files can only be opened by Pixelmator Pro. If you need the images from a PXD file without opening Pixelmator Pro, File Juicer can extract them directly.