Ghostscript

Ghostscript is a suite of Open-Source software which enables XnView and related programs to load PostScript-based file formats like PS, EPS, AI as well as PDF for viewing, printing and converting.

Ghostscript has to be downloaded and installed separately.

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