Preview, Photos, then the browser
Preview still thinks in JPEG/PNG. Photos.app is your library. The browser is the publisher. Keep masters in Photos; ship WebP from here.
Why it matters
- Homebrew is a lot for a marketer.
- Shortcuts.app workflows rot.
- You already have a browser.
How to do it
- Select files in Finder. Drop onto the converter (up to 100).
- Quality 80, width 1600 unless you know better.
- Download the first image. Unlock the ZIP if you need all of them.
Settings that work
HEIC from iPhone: use Safari. See HEIC to WebP.