QPDF 8.1.0 freeware
QPDF is a command-line program that does structural, content-preserving transformations on PDF files. It could have been called something like pdf-to-pdf. 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.
|OS||Windows XP, Windows Vista, Windows 7|
|Installation||Instal And Uninstall|
|Keywords||manipulate PDF, PDF manipulation, PDF file structure, manipulate, custom, customize|
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|8.1.0||Aug 22, 2018||New Release||Usability Improvements:
When splitting files, qpdf detects fonts and images that the document metadata claims are referenced from a page but are not actually referenced and omits them from the output file. This change can cause a significant reduction in the size of split PDF files for files created by some software packages. Prior versions of qpdf would believe the document metadata and sometimes include all the images from all the other pages even though the pages were no longer present. In the unlikely event that the old behavior should be desired, it can be enabled by specifying --preserve-unreferenced-resources. For additional details, please see Section 3.6, “Advanced Transformation Options”.
When merging multiple PDF files, qpdf no longer leaves all the files open. This makes it possible to merge numbers of files that may exceed the operating system's limit for the maximum number of open files.
|7.1.0||Jan 15, 2018||New Release||PDF files contain streams that may be compressed with various compression algorithms which, in some cases, may be enhanced by various predictor functions. Previously only the PNG up predictor was supported. In this version, all the PNG predictors as well as the TIFF predictor are supported. This increases the range of files that qpdf is able to handle.
QPDF now allows a raw encryption key to be specified in place of a password when opening encrypted files, and will optionally display the encryption key used by a file. This is a non-standard operation, but it can be useful in certain situations. Please see the discussion of --password-is-hex-key in Section 3.2, “Basic Options” or the comments around QPDF::setPasswordIsHexKey in QPDF.hh for additional details.
|7.0.0||Oct 6, 2017||New Release||Packaging and Distribution Changes:
QPDF's primary license is now version 2.0 of the Apache License [http://www.apache.org/licenses/LICENSE-2.0] rather than version 2.0 of the Artistic License. You may still, at your option, consider qpdf to be licensed with version 2.0 of the Artistic license.
QPDF no longer has a dependency on the PCRE (Perl-Compatible Regular Expression) library. QPDF now has an added dependency on the JPEG library.