diff --git a/pdf/reduce_pdf_size.sh b/pdf/reduce_pdf_size.sh
new file mode 100755
index 0000000..5556ea7
--- /dev/null
+++ b/pdf/reduce_pdf_size.sh
@@ -0,0 +1,12 @@
+#!/bin/sh
+# PDFSETTINGS:
+#   -dPDFSETTINGS=/screen lower quality, smaller size (72 dpi)
+#   -dPDFSETTINGS=/ebook better quality, larger size (150 dpi)
+#   -dPDFSETTINGS=/prepress same as Acrobat Distiller "Prepress Optimized" setting (300 dpi)
+#   -dPDFSETTINGS=/printer same as Acrobat Distiller "Print Optimized" setting (300 dpi)
+#   -dPDFSETTINGS=/default useful across a wide variety of uses, which may result in a larger output file 
+if [ "$#" -ne 2 ]; then
+  echo "usage: $0 INPUT_FILE OUTPUT_FILE"
+  exit 1
+fi
+gs -dCompatibilityLevel=1.4 -dPDFSETTINGS=/ebook -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -sOutputFile="$2" "$1"