Like many artists on fan games, it's great to experiment with tilesets and characters graphics and quickly see what they'll look like in RPG Maker XP. Working with a 16x16 grid, it became dull to constantly resize the assets.
I wrote a quick and simple command line Node tool that watches a root folder and automatically produces copies of the art at the higher resolution each time you save.
Might be a bit niche but it's saved me loads of time and it hopefully saves others some too! If you have suggestions to make it better let me know, I'm new to development.
The source code and instructions to get it up and running are on the linked GitHub page.