mod

HammerLibMinecraft mod for 1.21.4

Library used by all of DragonForge team's mods.

newest supported 1.21.4Library Api

Latest version: [1.12.2] HammerLib - 12.2.66
Minecraft: 1.10.2 to 1.21.4
Java: Java 21+
Loaders: Forge, NeoForge
Licence: not stated
Downloads: 56.7M
Updated: 2 mo ago
Available on: CurseForge

Partner

Host HammerLib servers

One click and HammerLib is installed with the right loader, on hardware built for it.

1.21.4
Forge
NeoForge

One click mod install
Loader matched for you
Ryzen CPUs
NVMe SSD

Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version HammerLib declares support for, newest first, with the Java runtime that version needs.

Other mods

Minecraft	Through	Java	Evidence	Released
1.21.4	Forge, NeoForge	21+	declared	3 Dec 2024
1.21.1	NeoForge, Forge	21+	declared	8 Aug 2024
1.21	Forge, NeoForge	21+	declared	13 Jun 2024
1.20.6	Forge, NeoForge	21+	declared	29 Apr 2024
1.20.5	Forge, NeoForge	21+	declared	23 Apr 2024
1.20.4	NeoForge, Forge	17+	declared	7 Dec 2023
1.20.3	Forge, NeoForge	17+	declared	4 Dec 2023
1.20.2	Forge, NeoForge	17+	declared	20 Sept 2023
1.20.1	NeoForge, Forge	17+	declared	12 Jun 2023
1.20	Forge, NeoForge	17+	declared	2 Jun 2023
1.19.3	Forge, NeoForge	17+	declared	7 Dec 2022
1.19.2	Forge, NeoForge	17+	declared	5 Aug 2022
1.18.2	Forge, NeoForge	17+	declared	28 Feb 2022
1.18.1	Forge, NeoForge	17+	declared	10 Dec 2021
1.16.5	NeoForge, Forge	8+	declared	14 Jan 2021
1.16.3	NeoForge, Forge	8+	declared	10 Sept 2020
1.15.2	Forge, NeoForge	8+	declared	17 Jan 2020
1.13.2	Forge, NeoForge	8+	declared	22 Oct 2018
1.12.2	Forge, NeoForge	8+	declared	18 Sept 2017
1.12.1	Forge, NeoForge	8+	declared	3 Aug 2017
1.12	NeoForge, Forge	8+	declared	2 Jun 2017
1.11.2	Forge, NeoForge	8+	declared	21 Dec 2016
1.11	NeoForge, Forge	8+	declared	14 Nov 2016
1.10.2	Forge, NeoForge	8+	declared	23 Jun 2016

Download

From HammerLib’s own host. Nothing is re-hosted here.

All 40 releases

[1.12.2] HammerLib - 12.2.66release14 Jul 2026

HammerLib-1.12.2-12.2.66.jar · 2.5 MB · for 1.12.2

Download latest

c7ac28f4c7b8…

Older versions24

[1.12.2] HammerLib - 12.2.6527 Jun 20261.12.22.5 MB7.4k downloads4564b78c47a2…Get
[1.12.2] HammerLib - 12.2.6313 Jun 20261.12.22.5 MB5.7k downloads44b5b3b050cd…Get
[1.12.2] HammerLib - 12.2.627 Jun 20261.12.22.5 MB80692d5ae41b…Get
[1.12.2] HammerLib - 12.2.613 Jun 20261.12.22.5 MBa2b80e7688f6…Get
[1.12.2] HammerLib - 12.2.601 Jun 20261.12.22.4 MB543 downloadsc20b0b96a39e…Get
[1.12.2] HammerLib - 12.2.5931 May 20261.12.22.4 MB470 downloadse6e10602a008…Get
[1.12.2] HammerLib - 12.2.5826 Mar 20251.12.22.5 MB449.7k downloadsd693d897584c…Get
[1.20.1] HammerLib - 20.1.5023 Mar 20251.20.12.3 MB610.0k downloads8cd108a78702…Get
[1.21.4] HammerLib - 21.4.55 Mar 20251.21.42.4 MB943 downloads4021b31a7740…Get
[1.21.4] HammerLib - 21.4.45 Mar 20251.21.42.4 MB25 downloads3abc26c29457…Get
[1.21.4] HammerLib - 21.4.35 Mar 20251.21.42.4 MB14 downloadsb6cd2c72a5d5…Get
[1.21.4] HammerLib - 21.4.24 Mar 20251.21.42.4 MB18 downloads3cd094aefb5f…Get
[1.21.4] HammerLib - 21.4.14 Mar 20251.21.42.2 MB15 downloadse076976b686f…Get
[1.20.1] HammerLib - 20.1.4818 Jan 20251.20.12.3 MB527.9k downloads439fe4bf635a…Get
[1.20.1] HammerLib - 20.1.4718 Jan 20251.20.12.3 MB1.2k downloads7a2c33cec43b…Get
[1.20.1] HammerLib - 20.1.4618 Jan 20251.20.12.3 MB1.6k downloads2c09c284a3f8…Get
[1.20.1] HammerLib - 20.1.4517 Jan 20251.20.12.3 MB1.7k downloads1ed32a62b9ca…Get
[1.20.1] HammerLib - 20.1.4413 Jan 20251.20.12.3 MB15.2k downloads2fd6af169fa4…Get
[1.20.1] HammerLib - 20.1.4313 Jan 20251.20.12.3 MB2.8k downloadsb7327ccb3b30…Get
[1.20.1] HammerLib - 20.1.416 Jan 20251.20.12.3 MB152.6k downloadsccce5d234d05…Get
[1.20.1] HammerLib - 20.1.394 Jan 20251.20.12.3 MB7.3k downloads963728c21d45…Get
[1.20.1] HammerLib - 20.1.3825 Dec 20241.20.12.3 MB38.6k downloadsb3679ab52f54…Get
[1.20.1] HammerLib - 20.1.3725 Dec 20241.20.12.3 MB316 downloads3c4192356ac0…Get
[1.20.1] HammerLib - 20.1.3624 Dec 20241.20.12.3 MB219 downloads023e3d20ae82…Get

Frequently asked

Does HammerLib work on Minecraft 1.21.4?

Yes. 1.21.4 is the newest Minecraft version HammerLib declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does HammerLib support?

Everything the author has declared, from 1.10.2 up to 1.21.4. The full list is in the table above, with the Java runtime each version needs next to it.

Which loader does HammerLib need?

Forge, NeoForge. A build for one loader will not load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for HammerLib?

Java 21 or newer, because that is what the newest Minecraft release it supports requires. The requirement comes from the game rather than from the mod itself.

How do I install HammerLib?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download HammerLib safely?

From the author's own page on CurseForge, which is where the data here is synced from. MCReference never mirrors, re-hosts or repackages a file: every download button points at the original source, so you get exactly what the author published.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for Minecraft JourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)Collective🎓 Collective is a shared library with common code for all of Serilum's mods.

Is this information wrong or missing something? .