This command changes the password which is also known as the open doc password. Have a look at some examples.
usage: pdfcpu changeupw [-v(erbose)|vv] [-opw ownerpw] inFile upwOld upwNew
|verbose||turn on logging||no|
|opw||owner password||if set|
|inFile||PDF input file||yes|
|upwOld||current user password||yes|
|upwNew||new user password||yes|
You can set the user password either when you
encrypt a file or later with
Change the user password of a document that already has one:
pdfcpu encrypt -upw upw enc.pdf writing enc.pdf ... pdfcpu changeupw enc.pdf upw upwNew writing enc.pdf ...
Set the user password of a document that has none. Any encrypted PDF file has either one of the two passwords set. Whenever you change the user password of a document that has a owner password set, you have to provide the current owner password:
pdfcpu encrypt -opw opw enc.pdf writing enc.pdf ... pdfcpu changeupw enc.pdf "" upwNew Please provide the owner password with -opw pdfcpu changeupw -opw opw enc.pdf "" upwNew writing enc.pdf ...