Note: Usually electron apps are heavyweight as they use browsers for simple things. Ebrowser uses core chromium effectively and very lightweight. "!xx ..." evaluates "xx.js" with the whole text as ...

There are 2 commands in the mod: /editnbt - it opens a notepad-like GUI, with the NBT data displayed in JSON text. To see how a item looks like, press the "Preview" button, and click "Save" to save ...