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Cheatsheet ImageMagick

Convert a PNG file to a JPG file​

convert input.png \
    -density 150 \
    -define jpeg:extent=500KB \
    output.jpg
convert input.png \
    -density 150 \
    -quality 50 \
    output.jpg

Convert a PDF to a series of PNG files​

convert                  \
    <your-PDF-file>.pdf  \
   -density 150          \
   -trim                 \
   -verbose              \
    page%d.png

Convert a PDF to a series of JPG files​

convert                  \
   -density 150          \
   -trim                 \
    <your-PDF-file>.pdf  \
   -quality 100          \
   -flatten              \
   -sharpen 0x1.0        \
   -verbose              \
    page%d.jpg

Compress a PDF​

convert -density 120 -quality 100 -compress jpeg original.pdf output.pdf

Resources​