A pdf owner password is the password used to set document restrictions in pdf files. As of the latest PDF version, document restrictions include printing, changing the document, document assembly, content copying, content copying for accessibility, page extraction, commenting, filling of form fields, signing, and creation of template pages. In Adobe Acrobat, the pdf owner password is called the change permissions password. Therefore, setting an owner password allows you to protect your copyrights while if you do not deny anything, for instance, you entitle people viewing your pdf file to have the right to print, so you have to set the print permission. Based on this, the command line of setting the printing permission is
pdftools.exe -i C:\*.pdf -o D:\*.pdf -S ownerpwd=123 -S keylen=2 -S permission=1
below is detailed operation.
First step—Downloading
Follow this link you will obtain Advanced PDF Tools
https://www.verypdf.com/pdfinfoeditor/advanced_pdf_tools_cmd.zip
The whole package is just of 3.04 MB, making the download swiftly, do remember to extract it, for it is a zipped package.
Second step—Launching
You are bound to launch MS-DOS command prompt window. Because the command line is bound to be operated under the MS-DOS environment. The procedure is easy, and the following pictures will guide you.
1) click “start” and then go to “Run”
2) input cmd into the following
3) press “ok”, you will find MS-DOS command prompt window popping up
Third step—Inputting
input command line to set the printing permission for a pdf file
it goes below
pdftools.exe -i C:\*.pdf -o D:\*.pdf -S ownerpwd=123 -S keylen=2 -S permission=1
where
- the option -i is to specify a pdf filename or a directory for input,
- the option -o is to specify the pdf file name for output,
- -S ownerpwd=123 to set owner password as 123,
- -S keylen=2 refers to 128 bit AES encryption (Acrobat 7 or higher),
- -S permission=1— allowed print the document.
when the input is done, press “enter” key, you will see
Fourth step—Checking
open the file to check the result
So, the setting of the printing permission for a pdf file is finished. The usage of Advanced PDF Tools Command Line is easy and effective, if you are interested, you can try other permission command lines.