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.
Terminal Method:
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