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Asked: 2026-05-22T02:30:48+00:00

How can I convert each pages of a PDF’s file in C#, using free

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How can I convert each pages of a PDF’s file in C#, using free command line or free library?

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  1. Editorial Team

    Example commandlines for Ghostscript converting multipage PDF to images (1 image per page):

    gswin32c ^
  -o gray_page_%03d.png ^
  -sDEVICE=pnggray ^
   input.pdf

    .

    gswin32c ^
  -o page_%03d.png ^
  -sDEVICE=png256 ^
   input.pdf

    .

    gswin32c ^
  -o page_with_alphachannel_%03d.png ^
  -sDEVICE=pngalpha ^
   input.pdf

    .

    gswin32c ^
  -o cmyk_page_%03d.jpeg ^
  -sDEVICE=jpegcmyk ^
  -dJPEGQ=80 ^
   input.pdf

    .

    gswin32c ^
  -o rgb_page_%03d.jpeg ^
  -sDEVICE=jpeg ^
  -dJPEGQ=100 ^
   input.pdf

    .

    gswin32c ^
  -o tiffg4_page_%03d.tiff ^
  -sDEVICE=tiffg4 ^
   input.pdf

    .

    gswin32c ^
  -o tiffg32nc_page_%03d.tiff ^
  -sDEVICE=tiff32nc ^
  -sCompression=lzw ^
   input.pdf

    …and many more are possible….

    If you need to control resolutions and page sizes (and not rely on Ghostscript’s defaults) add these parameters:

    -r600x600

    gives you a horizontal and vertical resolution of 600 dpi.

    -g5950x8420

    applies a widths of 5950 “devicepoints” and a height of 8420 “devicepoints”. Depending on the resolution used at the same time, the devicepoints will end up on paper in different sizes. In case of a resolution -r720x720 above example of -g5950x8420 will become the same as media size of DIN A4 ISO (which is in PostScript points 595 by 842.

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