How to decrypt multiple pdf files using qpdf?

Question

I have some n number of pdf files which are SECURED( i.e not password secured, but owner secured). I was able to decrypt single pdf at a time using _ "qpdf --decrypt Input.pdf Output.pdf" from Cmd Promt in Windows. can you help me to do the same with multiple pdf's using batch file or from cmd prompt.

Answer 1

If you just want to run the command from the shell (cmd.exe), you can do something like this from the directory containing the PDFs:

for %a in ("*.pdf") do "c:\Programs\qpdf\bin\qpdf.exe" --decrypt "%a" "%~dpna.decrypted.pdf"

Answer 2

@echo off

    setlocal enableextensions disabledelayedexpansion

    if not exist output\ md output
    for %%a in (*.pdf) do qpdf --decrypt "%%~fa" "output\%%~nxa"

Create an output folder under current directory. Then for each pdf in current folder call qpdf to decrypt, passing as argument the full path of the input file (%%~fa) and the output file, that is, the output folder followed by the name and extension of the file being processed (%%~nxa)

Answer 3

#!/bin/bash
# unprotect multiple pdf files in a directory with qpdf 10Jan20
# run the script from the same directory as the files
if [ -d output ];
then
    echo "output directory exists"
else
    mkdir output
fi


yourfilenames=`ls *.pdf`
#echo yourfilenames
for eachfile in $yourfilenames
do
   echo $eachfile
    qpdf --decrypt $eachfile    output/$eachfile
done