This is Leo's plugin, slightly modified to produce PNGs instead to maintain transparency. Thanks to Leo for the original plugin.
Original plugin link: https://bubble.io/plugin/image-resizer-1683654524342x399537649355325440
Description from Leo's original plugin:
A simple plugin to resize images on the server side.
It relies on the sharp Node module.
You can see how to use the plugin on: https://bubble.io/page?name=index&id=imageresizer-26427