A pdf owner password is the password used to set document restrictions in pdf files. In Adobe Acrobat, the pdf owner password is called the change permissions password. As of the latest PDF version, document restrictions can 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. Therefore, setting an owner password allows you to protect your copyrights. The follow part will show you how to set an owner password for a pdf file using Advanced PDF Tools Command Line.
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 an owner password for a pdf file
it goes below
pdftools.exe -i C:\*.pdf -o D:\*.pdf -S ownerpwd=123 -S keylen=2
where
- -i is to specify a pdf filename or a directory for input,
- -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)
when the input is done, press “enter” key, you will see
Fourth step—Checking
you will find there is a security setting appeared. If you click “Permission Details”, a window will popup showing the document restrictions. and you click “Change Setting”, an owner password is needed, see below,
and then typing owner password 123, you are allowed to see,
