I just needed to resize downwards a photo for publishing to the web. The photo existed on Dropbox (not Photos.app).
To do this I ended up using Pixelmator but it was very long winded.
I tried an app called Image Size but it was ugly and seems limited to using Photos.app.
Can anybody recommend a good app or workflow to simply downsample a single image?
I use an Automator action that when I right click a image(s) I have a service option to resize. https://www.macrumors.com/how-to/quickly-resize-images-mac-automator/
Workflow has a Resize Image function. Here’s an example workflow that uses it.
on iOS you can use workflow - resize image is built in - you can also use absolute pixel sizes if preferred
+1 on Workflow. I’ve got one set up for resizing multiple images for posting online. Quick and easy once you get it set up.
Awesome, I actually looked at Workflow - but only briefly (and it was late at night!).
I will explore more deeply, because that is clearly the most efficient/automatic way to do this.