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Original author(s) Jay Berkenbilt
Initial release April 26, 2008 (2008-04-26)
Stable release 5.1.1 / January 14, 2014; 2 months ago (2014-01-14)
Development status Active
Written in C++
Operating system Multiplatform
Type PDF software
License Artistic License
Website qpdf.sourceforge.net

QPDF is a free command-line program that can convert one PDF file to another equivalent PDF file. It is capable of performing a variety of transformations such as linearization (also known as web optimization or fast web viewing), encryption, and decryption of PDF files. It also has many options for inspecting or checking PDF files, some of which are useful primarily to PDF developers.

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