A PDF processor written in Go.

View the Project on GitHub pdfcpu/pdfcpu


Change Owner Password

This command changes the password which is also known as the set permissions password or the master password. Have a look at some examples.


pdfcpu changeopw [-upw userpw] inFile opwOld opwNew

Common Flags

name description values
v(erbose) turn on logging  
vv verbose logging  
q(uiet) quiet mode  
u(nit) display unit po(ints),in(ches),cm,mm
c(onf) config dir $path, disable
upw user password  


name description required
inFile PDF input file yes
opwOld current owner password yes
opwNew new owner password yes, must not be empty!


You have to set the owner password when you encrypt a file and you can change it anytime later with changeopw.

Change the owner password:

$ pdfcpu encrypt -opw opw enc.pdf
writing enc.pdf ...

$ pdfcpu changeopw enc.pdf opw opwNew
writing enc.pdf ...