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Utility mod that contains really useful code for quite a few mods.

This library provides:

  • Simple, annotation-based content registration.
    • For Blocks, HammerLib automagically registers BlockItem(s). If you want to disable BlockItem(s), let your block implement INoItemBlock, ICustomBlockItem, or ICreativeTabBlock, depending on what you want to achieve.
    • For BlockEntity rendering, custom BlockEntityType constants may have additional @TileRenderer, pointing to an IBESR<Tile> class.
  • Old-styled language parsers in format of "key=value", instead of JSONs (the file names and format is like in older game versions, but you need to call LanguageAdapter.registerMod(MOD_ID); inside your mod's constructor for it to register.
  • Mod Source checks, that allow you to check if the mod was downloaded from adware/malware sites, AND warn users about it.
  • Java-based recipe registration with a simple RegisterRecipesEvent, that runs on HammerLib.EVENT_BUS, allowing you, as a developer, to register crafting recipes like before, with code.
  • Java-based tag population, with BuildTagsEvent, that runs on HammerLib.EVENT_BUS.
  • Vastly simplified networking, using Network class, and IPacket + INBTPacket to allow for flawless and intuitive packet code development.
  • Wrappers for block harvesting, that has been moved over to tags - BlockHarvestAdapter
  • Field-based NBT serialization, so that you don't make a typo/forget to write serialization/deserialization code.
  • Good old TileEntity wrappers, with TileSyncable and TileSyncableTickable, that allow synchronization of initial state, as well as registering properties that will be synchronized independently.
  • ContainerAPI for BlockEntities, allowing to avoid MenuType<?> altogether (no need to register screen providers, menu types etc)
  • ItemStack -> Color[] API, with TexturePixelGetter.getAllColors
  • Annotation-based custom model loaders (@LoadUnbakedGeometry on IUnbakedGeometry<SELF>), avoids using the geometry loader class by making a common wrapper.
  • ...And a whole lot more!

And a lot of rich features for mod devs.

Not enough? You can just view sources on  GitHub, it's free!


  • You can use this mod in your modpack.
  • Yes, you are allowed to build a mod that requires Hammer Core, but not embeds it!
  • You are not allowed to repost this mod to other sites without providing a CurseForge/Modrinth download link and my permission ( Zeitheron on Discord)
  • You are not allowed to include this (or any other mods of DragonForge team) in your own mod. Building addons, however, is allowed, but a friendly PM would be good.


  • The only supported version of minecraft is the latest one that this mod exists for. DO NOT ASK TO DOWNGRADE!

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If you would like to support my work, you can become a patron via  Patreon