Convert png/jpg/webp images on MacOS using ImageMagick

Installing ImageMagick

ImageMagick is a command-line tool and is the swiss army knife of image manipulation. It does everything.

To install ImageMagick on MacOS, open a Terminal window and

brew install imagemagick

Once the install has finished close the terminal window. If you don't then when you type the ImageMagick command below, it won't be found.

Convert an image to another format using ImageMagick

You can get some help to see all of the stuff that ImageMagick can do

convert --help | more

But converting from one image format is dead simple as ImageMagick will check the input and output filename extension that you specify and convert accordingly, so to convert from a JPEG to WEBP

convert inputfile.jpg outputfile.webp 

Just change the filename to convert to a different format

convert inputfile.jpg outputfile.png