Ghostscript

Ghostscript is open-source software which enables XnView and related programs to load PostScript-based file formats (PS + EPS + AI) in addtion to PDF for viewing, printing and converting.

Ghostscript has to be downloaded and installed separately.

XnView Classic as well as the 32-bit editions of XnView MP, XnConvert, nConvert, and XnShell require Ghostscript 32-bit to be installed (even on 64-bit operating systems), while all 64-bit versions require Ghostscript 64-bit.