PDFTK is a free, open source PDF toolkit. It is one of my preferred tools to deal with pdf metadata. It runs in Windows and Linux platforms.
For instance, you can read the pdf metadata:
$ pdftk original.pdf dump_data output data.txt $ cat data.txt InfoKey: Creator InfoValue: Writer� InfoKey: Producer InfoValue: OpenOffice.org 3.1� InfoKey: CreationDate InfoValue: D:20090923135542+02'00' PdfID0: e5d831c33f77ac694b32456732f2c86 PdfID1: e5d831c33f77ac694b32456732f2c86 NumberOfPages: 1 |
And you can also modify the pdf metadata:
$ pdftk original.pdf update_info data.txt output resultado.pdf |
Note the data.txt must be in a correct format!