There is only one file type that uses the .MCSTRUCTURE extension:
Minecraft Structure Block
An MCSTRUCTURE file is a 3D model created in Minecraft Java or Bedrock Edition for Windows. It contains a Minecraft structure, such as a building or natural feature, saved using the game's Structure Block tool. MCSTRUCTURE files can be shared between Minecraft players, allowing them to include each other's structures in their Minecraft worlds.
All versions of Minecraft allow players to save copies of structures within structure blocks, using the game's Structure Block tool. Players most often use this feature to save time when creating many identical structures, or to create and share copies of complex buildings and natural features with other players.
In Minecraft Java Edition and Minecraft Bedrock Edition for Windows, structure blocks are saved in MCSTRUCTURE files. These files can be found in players' data/minecraft/structures (Java Edition) or ~/games/com.mojang/structures (Bedrock Edition) directory. To share an MCSTRUCTURE file with another Minecraft player, you must include it in a Minecraft resource or behavior pack (.MCPACK file).
You can open an MCSTRUCTURE file in Minecraft Java Edition or Bedrock Edition for Windows. To do so, you must:
- Import the resource or behavior pack containing your MCSTRUCTURE file.
- In-game, place your structure block and right-click to open the Structure Block menu.
- Select Load mode and enter the name of your MCSTRUCTURE file (minus the .mcstructure extension).
- Click the button.
Updated: September 25, 2020