See how you can easily batch resize a bunch of images using the Terminal or Preview App without expensive third party or photo editing software for these tasks on Mac OSX.
Fire up your Terminal and cd into the desired image directory.
Then simply type sips -Z 1024 *.jpg and you're done.
So what is happening here?
- sips is the command and -Z keeps the image's aspect ratio.
- "1024" is the maximum width and height.
- "*.jpg" converts every image ending in .jpg.
Caution: Make a copy first if you want to preserve images with their larger size!
Preview App Method:
See how to use Previews’ powerful image resize feature it in a few simple steps:
- open Finder, select a group of images and open them all with the Preview App.
- once they are opened in Preview: Select All, either by hitting ⌘+A (Command+A) or by clicking the Edit menu and select that option
- go to Tools -> Adjust Size
- enter a value for the new width and height, then hit OK
- go to File and click Save All or to save a NEW resized version, choose Export Selected Images or just Save As