Is there a free way to convert a PDF document to a PNG image?
This is overkill for what you need, but in the absence of another answer, GIMP can do this for you. Just install it, open the PDF, and save-as a PNG.
Windows: Install PDFCreator and open your PDF. Print it to the PDFCreator printer (or whatever you called it) and hit save. When you hit save, after choosing a filename, set the filetype to PNG.
Linux: Install ImageMagick (on Ubuntu:
sudo apt-get install imagemagick) and then in a terminal type:
convert [Input PDF File.pdf] [Output PNG File.png].
Mac OS X: Open the PDF in Preview and in the Save As dialog, set the filetype to png.
You could also use
"c:\Program Files\gs\gs9.10\bin\gswin64.exe" -dBATCH -dNOPAUSE -sDEVICE=pnggray -r300 -dUseCropBox -sOutputFile="path_to_png_files\pdffilename-%03d.png" "path_to_pdf_file\pdffilename.pdf"
The path to
GS should be adjusted based on your installation.
DEVICE parameter here will specify grayscale. You can also output with color instead. These settings will allow you to output to 24-bit color, 300 dpi PNG files using the RGB.icc color profile:
-sDEVICE=png16m -sOutputICCProfile=default_rgb.icc -r300
GS seems to run much faster, and it is more suitable for big batches of conversion.
Which OS do you use?
On a Mac, it's as simple as opening the PDF in the Preview app and saving it as a PNG.
On http://www.zamzar.com/, you can convert many file types for free also.
If using Windows, I would use Bullzip PDF Printer, simply choose print and then select .PNG as the file type.
The docupub online tool works quite well, you get an image per page: http://docupub.com/pdfconvert/
This free online tool:
will convert a PDF file to a PNG image inside your browser. You won't need to install anything.
If the PDF is multi-page, it will create a new image for each page.