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Resize Multiple Images with ImageMagick

resize

Problem​

Sometimes, we need to resize multiple images quickly with the same dimension like the same width or height. This method can quickly do that with an image tool ImageMagick.

Install ImageMagick​

ImageMagick is a powerful image processing tool for command-line.

On Mac, install ImageMagick with brew.

brew install imagemagick

or if on Mac with M1/M2/M3 chips, following this guide:

arch -x86_64 brew install imagemagick

Prepare​

Create a directory /xyzand put all the images there.

tip

Use the same naming convention for the image file names such as:

  • imagefile_001.png
  • imagefile_002.png

Resize​

In the newly created directory /xyz, run this 

mogrify -resize 1000 *.png

This sub-command mogrify from ImageMagick will set the width of all the .png image files in folder /xyz to be 1000px.

Or you can resize the images with the same height, for all the png and jpg files.

mogrify -resize x500 *.png *.jpg

This will set the height of all the .png AND .jpg image files to be 500px.

Reference​

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