QPDF is a command-line program that does structural, content-preserving transformations on PDF files. Information captured from the web site below.
It could have been called something like pdf-to-pdf as it also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.
- QPDF is capable of creating linearized (also known as web-optimized) files and encrypted files.
- QPDF is also capable of converting PDF files with object streams (also known as compressed objects) to files with no compressed objects or to generate object streams from files that don't have them (or even those that already do).
- QPDF also supports a special mode designed to allow you to edit the content of PDF files in a text editor.
- QPDF includes support for merging and splitting PDFs through the ability to copy objects from one PDF file into another and to manipulate the list of pages in a PDF file.
- The QPDF library also makes it possible for you to create PDF files from scratch.
- Source available for building yourself.
- Windows has prebuilt versions in 32 and 64 bit.
- Linux has prebuilt versions in 32 and 64 bit. Generally this program is supplied by the Linux build.
 For more information
- http://qpdf.sourceforge.net/ download site also includes a manual.