Awesome

SchematicJS

A TypeScript/JavaScript library for loading and saving Sponge Schematics (WorldEdit) and Minecraft Structures.

The following schematic formats are supported:

• Sponge (Versions 1-3) (.schem)
• Structure Block (.nbt)

Caveats:

• No entity support
• No block entity support (nbt BE data, actual blocks are provided)
• No biome support