Download of qpdf-10.4.0.sha256 (qpdf-10.4.0.sha256 ( external link: SF.net): 1,723 bytes) will begin shortly. If not so, click link on the left.
QPDF is a C++ library and set of programs that inspect and manipulate the structure of PDF files. It can encrypt and linearize files, expose the internals of a PDF file, and do many other operations useful to end users and PDF developers.
