VOXL

VOXL is a desktop editor built for datapack and resourcepack development, because doing it in a general-purpose editor means hand-writing JSON and hoping you got the schema right. It reads your local Minecraft install to pull registries and textures, so autocomplete and validation match whatever version you're targeting. Live previews render text components, item and block models, and structures as you type. Built on Tauri, so it's a small binary that doesn't eat half a gigabyte of RAM to display a text file.