gs -sDEVICE=pdfwrite -dPDFSETTINGS=/printer -dCompatibilityLevel=1.4 -dNOPAUSE -dQUIET -dBATCH -sOutputFile=output.pdf input.pdf

Replace input.pdf with file name and path of your PDF file

gs \ -q -dNOPAUSE -dBATCH -dSAFER \ -sDEVICE=pdfwrite \ -dCompatibilityLevel=1.3 \ -dPDFSETTINGS=/ebook \ -dEmbedAllFonts=true \ -dSubsetFonts=true \ -dAutoRotatePages=/None \ -dColorImageDownsampleType=/Bicubic \ -dColorImageResolution=72 \ -dGrayImageDownsampleType=/Bicubic \ -dGrayImageResolution=72 \ -dMonoImageDownsampleType=/Subsample \ -dMonoImageResolution=72 \ -sOutputFile=output.pdf \ input.pdf

Shrinkpdf: shrink PDF files with Ghostscript

The simplest shell script in the world to shrink your PDFs (as in reduce filesize) under Linux with Ghostscript. Inspired by some code I found in an OpenOffice Python script (I think). It feeds an existing PDF through Ghostscript, downsamples the images to 72dpi, and does some other stuff.

shrinkpdf.sh

#!/bin/sh gs -q -dNOPAUSE -dBATCH -dSAFER \ -sDEVICE=pdfwrite \ -dCompatibilityLevel=1.3 \ -dPDFSETTINGS=/screen \ -dEmbedAllFonts=true \ -dSubsetFonts=true \ -dColorImageDownsampleType=/Bicubic \ -dColorImageResolution=72 \ -dGrayImageDownsampleType=/Bicubic \ -dGrayImageResolution=72 \ -dMonoImageDownsampleType=/Bicubic \ -dMonoImageResolution=72 \ -sOutputFile=out.pdf \ $1

Usage

Then run:

# sh shrinkpdf.sh yourfile.pdf

This produces a shrunken file named out.pdf in the current directory.

If you don't know your PDF password:

Some times users forgot his password then what to do. here many tools available for password break.

We make tutorial for pdf password break as soon as.

You can use Ghost script :

gs -q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile=unencrypted.pdf -c .setpdfwrite -f YOURFILENAME.pdf

Bulk PDF file compress script

#!/bin/bash

## Script to compress PDF Files using ghostscript incl. subdirs

## Copyright (C) 2016 Maximilian Fries - All Rights Reserved

## Contact: maxfries@t-online.de

## Last revised 2016-07-29

# Usage

# ./pdf-compress.sh [screen|ebook|prepress|default] [verbose]

# Variables and preparation

{

count=0

success=0

successlog=./success.tmp

gain=0

gainlog=./gain.tmp

pdfs=$(find ./ -type f -name "*.pdf")

total=$(echo "$pdfs" | wc -l)

log=./log

verbose="-dQUIET"

mode="prepress"

echo "0" | tee $successlog $gainlog > /dev/null

}

# Are there any PDFs?

if [ "$total" -gt 0 ]; then

#Parameter Handling & Logging

{

echo "-- Debugging for Log START --"

echo "Number of Parameters: $#"

echo "Parameters are: $*"

echo "-- Debugging for Log END --"

} >> $log

# Only compression-mode set

if [ $# -eq 1 ]; then

mode="$1"

fi

# Also Verbose Level Set

if [ $# -eq 2 ]; then

mode="$1"

verbose=""

fi

echo "$pdfs" | while read -r file

do

((count++))

echo "Processing File #$count of $total Files" | tee -a $log

echo "Current File: $file "| tee -a $log

gs \ -q -dNOPAUSE -dBATCH -dSAFER \ -sDEVICE=pdfwrite \ -dCompatibilityLevel=1.3 \ -dPDFSETTINGS=/ebook \ -dEmbedAllFonts=true \ -dSubsetFonts=true \ -dAutoRotatePages=/None \ -dColorImageDownsampleType=/Bicubic \ -dColorImageResolution=72 \ -dGrayImageDownsampleType=/Bicubic \ -dGrayImageResolution=72 \ -dMonoImageDownsampleType=/Subsample \ -dMonoImageResolution=72 \ -sOutputFile="$file-new1" "$file" | tee -a $log

sizeold=$(wc -c "$file" | cut -d' ' -f1)

sizenew=$(wc -c "$file-new" | cut -d' ' -f1)

difference=$((sizenew-sizeold))

# Check if new filesize is smaller

if [ $difference -lt 0 ]

then

rm "$file"

mv "$file-new1" "$file"

printf "Compression was successfull. New File is %'.f Bytes smaller\n" \

$((-difference)) | tee -a $log

((success++))

echo $success > $successlog

((gain-=difference))

echo $gain > $gainlog

else

rm "$file-new"

echo "Compression was not necessary" | tee -a $log

fi

done

# Print Statistics

printf "Successfully compressed %'.f of %'.f files\n" $(cat $successlog) $total | tee -a $log

printf "Safed a total of %'.f Bytes\n" $(cat $gainlog) | tee -a $log

rm $successlog $gainlog

else

echo "No PDF File in Directory"

fi