# a2ping > Convert images into EPS or PDF files. > More information: . - Convert an image to PDF (Note: Specifying an output filename is optional): `a2ping {{path/to/image.ext}} {{path/to/output.pdf}}` - Compress the document using the specified method: `a2ping --nocompress {{none|zip|best|flate}} {{path/to/file}}` - Scan HiResBoundingBox if present (Note: It Defaults to yes): `a2ping --nohires {{path/to/file}}` - Allow page content below and left of the origin (Note: It defaults to no): `a2ping --below {{path/to/file}}` - Pass extra arguments to `gs``: `a2ping --gsextra {{arguments}} {{path/to/file}}` - Pass extra arguments to external program (i.e pdftops): `a2ping --extra {{arguments}} {{path/to/file}}` - Display help: `a2ping -h`