I keep having to look for these four tools when making PWA icons.

• Convert SVG to PNG
  https://ezgif.com/svg-to-png/ (set the width to at least 512)

• Make sure the icon is in the visible space
  https://maskable.app/editor

• Convert it to different sizes for manifest.json
  https://app-manifest.firebaseapp.com/

• Convert it to other sizes (Apple, MSTile)
  https://favicomatic.com/done

And one of these days I’m 100% going to make a script that does all of this. One of these days.