Rasterize PDF as a Automator Quick Action

README.md

About

This is a Mac OS Automator Quick Action to rasterize selected PDFs should you ever be faced with having to print, sign, and scan a physical document.

Requirements:

1. ImageMagick needs to be installed, you can install via brew install imagemagick in the terminal.
2. \System\Library\CoreServices\Finder.app needs to be added under System Preferences -> Privacy & Security -> Full Disk Access.

Installation:

1. Download RasterizePDF.sh and make sure it's executable by running chmod +x RasterizePDF.sh.
2. Open the Automator app and create a new "Quick Action"
3. Set "Workflow receives current" to "PDF files" and "in" to "Finder". Adjust the Image if desired.
4. Search for "Run Shell Script" and drag to the right.
5. Set the "Pass input" option to "as arguments".
6. Paste the following, adjusting the path to the script as required: `"/Users/MyUser/Path/To/RasterizePDF.sh" "$@"
7. Save your work and profit!

RasterizePDF.sh

#!/bin/bash
export PATH="$PATH:/opt/homebrew/bin:/opt/homebrew/sbin"

for filepath in "$@"
do
  dir=$(dirname "$filepath")
  base=$(basename "$filepath" .pdf)

  # Convert the PDF to individual PNGs
  convert -define pdf:printed=true -density 150 "$filepath" "$dir/$base-%03d.png"

  # Identify the individual page image files
  images=()
  for img in "$dir/${base}-"*.png; do
    images+=("$img")
  done

  # Convert the images back into a PDF
  convert "${images[@]}" "$dir/${base}-Scan.pdf"

  # Remove the temporary files
  rm "$dir/${base}-"*.png
done