PDF Size Reduce/compress using Ghostscript

PDF Size Reduce(compress) using Ghostscript at terminal. Here required 2 things for the process.

1. shrinkpdf.sh file
2. Installed Ghostscript in your machine

Setup

1. Download the shrinkpdf.sh file from Here

2. Install Ghostscript in your machine if not installed

For Mac :

$ sudo brew install ghostscript

For Linux :

RedHat and derivatives :

$ sudo yum install ghostscript

Or on Debian:

$ sudo apt-get install ghostscript

Process

To reduce your pdf file you need to pass 3 parameters

./shrinkpdf.sh [inputfile] [outputfile] [resolution_in_dpi]

1. [inputfile] : Actual Filename of the PDF that is to be converted
2. [outputfile] : New filename of the converted PDF
3. [resolution_in_dpi] : The DPI (resolution) for the output PDF. Output resolution defaults is : 72 . You can use your own choice like 150 dpi , 150 dpi etc.

N.B: Lower DPI is better but the quality will be worse

Execute and Reduce PDF

Step 1 :

Make the shrinkpdf.sh file executable and give it permissions to execute by bellow command

$ sudo chmod +x shrinkpdf.sh

Now your shrinkpdf.sh file is executable.

Step 2 :*

Now you can execute the the shrinkpdf.sh

$ sudo ./shrinkpdf.sh sample-pdf.pdf output.pdf 150

It will create a new file name output.pdf with 150dpi in same directory.

you can check the file size by below command.

$ du -sh *
4.0K    README.md
124K    output.pdf
460K    sample-pdf.pdf
4.0K    shrinkpdf.sh

More Detials :

http://www.alfredklomp.com/programming/shrinkpdf/

https://www.ghostscript.com/