Rasterize PDF file on Linux (bash function)

raster.sh

#!/bin/bash

#
# Script to rasterize a PDF file
#
# You can adjust the density ("convert" argument)
# or other options as you wish
#
# It is a function so that you can include in your .bashrc (or whatever)
# and use as a command
#
#
# Based on: https://superuser.com/a/1588781
#

rasterizePdf() {(
    set -e

    if [ $# -eq 0 ]; then
        echo "Rasterize a PDF" >&2
        echo "Usage: $0 <pdf_file>" >&2
        exit 1
    fi

    for input in "$@"; do
        tmp="$(mktemp).pdf"
        output="${input%.*}-raster.pdf"

        convert \
            -render \
            -density 300 \
            "$input" \
            "$tmp"

        gs \
            -sDEVICE=pdfwrite \
            -dCompatibilityLevel=1.4 \
            -dNOPAUSE \
            -dQUIET \
            -dBATCH \
            -sOutputFile="$output" \
            "$tmp"

        rm -f "$tmp" "${tmp%.*}"

        echo -e "✅ $input \033[2m\n  to $output\033[0m"
    done
)}

# rasterizePdf YOUR_FILE.pdf