How to set an open password for a pdf file by using command line?

A pdf open password is the password used to restrict the opening of a pdf file in Adobe Acrobat, So if you have some pdf files that you won’t allow other people to open, you can set an open password. And how to set an open password of pdf, Advanced PDF Tools Command Line will tell you.

Step 1 click the following link to download Advanced PDF Tools

http://www.verypdf.com/pdfinfoeditor/advanced_pdf_tools_cmd.zip

please unpack it when download is finished.

Step 2 launch the 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”

start

2) input cmd into the following

Run

3) press “ok”, you will find MS-DOS command prompt window popping up

 command prompt

Step 3 input command line to set an open password

it goes below

pdftools.exe -i C:\*.pdf -o D:\*.pdf  -S openpwd=xux -S keylen=2

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 openpwd=xux to set a user password as xux
  • -S keylen=2 refers to 128 bit AES encryption (Acrobat 7 or higher)

when the input is done, press “enter” key, you will see

detailed operation in  command prompt

Step 4 open the file to check if opening the file an open password is needed

output pdf file

If you have any questions on setting pdf passwords, please come into live support for help.

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