Resize Lite 4+

I've tried many apps to resize photos and very few of them do what they say they do. They may resize your photos, but don't believe them when they say they've resized them to your specifications. Check the pixels carefully, and you'll see that most resizing programs are worthless if you want to be precise. Not so with this program. It works -- and is accurate!

I definitely need a simple resizer. Not sure how I found this, or when I got it, but I came across it just now on my computer as I was looking for an easy way to do some batch resizing. Tons of options here for different ways to adjust photos, and to switch between filetypes (JPG, PNG, HEIC...) and a LOT of other ways to adjust images that I'm not really sure of.
Took off one star because the UI for actually entering your desired changes is really, REALLY tiny.
But really, this is a cool program that "does what it says on the tin," and does it well.

I've resized single files or over 100 files all at once. I've converted PNG to JPG (etc.) just with select, open, choose conversion, and "go". It's really easy to use, and I haven't seen it crash or add artifacts. In fact, it works so good that after freeloading on this for the last few years, I've paid for the "pro" version.