Minecraft 1.21.9 Snapshot 25w31a is the first snapshot for the Minecraft Java fall 2025 update. It introduces several new features such as: Copper Golem, Copper Chests, Shelves, additional armor, tools, and weapons made from Copper, a new F3 interface, and more…

Features:

Copper Golem:

  • A new mob that can be created by placing a Jack o’Lantern or carved Pumpkin on a Copper Block. It oxidizes over time like Copper blocks and can be waxed to maintain its state. When fully oxidized without waxing, it turns into a Copper Golem Statue Block. It can pick up up to 16 items from nearby Copper Chests and sort them into regular or trapped chests based on item type.

Copper Chests:

  • A new chest type with 4 oxidation variants that can be waxed. Crafted by placing 8 Copper Ingots around a regular chest in a crafting table. Copper Chests interact with the Copper Golem for item management.

Shelves:

  • A new block type that can store up to 3 item stacks, displayed on the front face. When powered by Redstone, it can connect horizontally with up to 2 other shelves and automatically exchange items with the player’s hotbar: 1 shelf exchanges 3 rightmost slots, 2 shelves exchange 6 rightmost slots, and 3 shelves exchange the entire hotbar. Available in all wood types, crafted from 6 corresponding Stripped Logs.

Technical Changes:

  • Removal of the “fixed chunks” concept (spawn chunks), replaced with methods like Nether portals or Ender pearls for chunk loading.
  • Enhanced Debug Options Screen (opened with F3 + F5), allowing customization of debug info display (off, on with F3, or always on), with new features like chunk borders, entity hitboxes, and Octree visualization. Settings are saved between game sessions.
  • Addition of a chunk loading progress bar on the loading screen (a feature removed since 12w18a).

Copper Materials and Tools:

  • Introduction of armor, tools, and weapons made from Copper, along with Copper horse armor and oxidizable lightning rods.

Bug Fixes and Improvements:

  • Fixed issues related to the F3 interface, sound, and performance (e.g., MC-73881, MC-89142).
  • Optimized chunk sending for players with weak internet connections.

Screenshots:

Experimental features

New controls

Loading worlds

New armor

New tools

Copper nuggets

Horse armor

Shelf block

New f3 screen

Copper golems

Copper statues

New lightning rods

Requires:

Java 21+

Java Runtime Environment

How to install:

Minecraft 1.21.9 Snapshot 25w31a Download Links

Client: Download from Server 1

Server: Download from Server 1

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