Image Resizing from the shell

Here's a scenario I encounter pretty often:

1. I download an image from Unsplash
2. I move the image into the folder of a webapp
3. The image is like 1GB because it's so high quality, and that's no good for download speeds from the webapp
4. I need to resize it to make it smaller.

You could open up a GUI to resize the image (preview on MacOS works really well for this).. but sometimes I just want to stay in teh terminal.

The tool to solve the problem in the terminal is ImageMagick.

There are two commands I typically use. The first is identify <image> which will tell you the current width & height of the image.

The second I use is convert <source_image> -resize 1000x <destination_image>. This will resize the source image to a width of 1000px, and will maintain the aspect ratio for the height.

There's a lot more you can do with ImageMagick tools. If you know some tricks, let everyone know in teh comments!

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Hopefully this is useful for you. If you're looking for more tips on Linux & development, follow me here on dev.to or on Twitter @connorbode.