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XPDF is a cross-platform suite of command-line PDF programs which allow you to view PDF files and includes several tools for converting PDFs into text and extracting images.


Converting to PNG

PDFtoPNG.exe will convert each page of the PDF into a PNG image with a DPI you specify. Example:

pdftopng.exe -r 72 mydocument.pdf x

This will convert every page of the PDF into a series of PNG images named x-000000.png, x-000001.png, etc., at 72 DPI.

Converting to Text

PDFtoText.exe is the best program I've seen at converting a PDF document into a plain text file because is has several features to help retain the original layout of the document. Example:

pdftotext.exe -table mydocument.pdf mytext.txt

This will convert the PDF document into a text file while trying to retain any tabular layouts.

Extracting Images

PDFImages.exe can extract all of the images from a PDF document. Unless specified to retain JPEG format, all images will be exported into PPM. Example:

pdfimages.exe -j mydocument.pdf x

This will extract all of the images from a PDF into a series of files named x-0000.ppm, x-0001.ppm, etc., while retaining all JPEGs.