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Knight LibMinecraft mod for 1.21.1

A library that serves as a bridge between mods.

client and servernewest supported release 1.21.1UtilityGame MechanicsLibrary
Latest version
2.0.5
Minecraft
1.19 to 1.21.1
Java
Java 21+
Loaders
Fabric, NeoForge, Forge
Licence
GPL-3.0-only
Downloads
763.8k
Updated
18 d ago
Available on
Modrinth
Space NodeOur hosting

Host Knight Lib servers

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

  • 1.21.1
  • Fabric
  • NeoForge
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Forge21+declared8 Aug 2024
1.21NeoForge, Forge, Fabric21+declared13 Jun 2024
1.20.1Forge, Fabric, NeoForge17+declared12 Jun 2023
1.20Forge, Fabric, NeoForge17+declared2 Jun 2023
1.19.2NeoForge, Forge, Fabric17+declared5 Aug 2022
1.19.1Fabric, NeoForge, Forge17+declared27 Jul 2022
1.19Forge, NeoForge, Fabric17+declared7 Jun 2022

Download

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

Browse 27 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    2.0.5 · 15 Oct 2026 · knightlib-neoforge-1.21.1-2.0.5.jar

    Get NeoForge

  • Forge

    1.2.0 · 26 Jan 2025 · knightlib-forge-1.21-1.2.0.jar

    Get Forge

  • Fabric

    1.1.1 · 10 Nov 2024 · knightlib-fabric-1.21-1.1.1.jar

    Get Fabric

Most recently published release

2.0.5release15 Oct 2026

knightlib-neoforge-1.21.1-2.0.5.jar · 1.0 MB · for 1.21.1, 1.21 · NeoForge

Download this release
1ef8b486a19f…
Older versions24
  • 2.0.42 Oct 20261.20.1, 1.201.3 MB5a2542158813…Get
  • 2.0.323 Sept 20261.21.1, 1.211.0 MB337030fc773a…Get
  • 2.0.220 Sept 20261.20.1, 1.201.2 MBb31c857b2048…Get
  • 2.0.111 Sept 20261.21.1, 1.211.0 MB272fae2d8357…Get
  • 2.0.011 Sept 20261.21.1, 1.211.0 MB5216dbb420f7…Get
  • 1.6.210 Sept 20261.21.1, 1.210.7 MBdd92f87c03db…Get
  • 1.6.19 Jul 20261.20.1, 1.200.9 MB2.5k downloadsb5db8e3aa1d5…Get
  • 1.6.09 Jul 20261.20.1, 1.200.9 MB101 downloadsc566aec2db23…Get
  • 1.5.54 Jul 20261.21.1, 1.210.6 MB573 downloads72c36140bbae…Get
  • 1.5.34 Jul 20261.20.1, 1.200.8 MB815 downloads25a3b4e3688c…Get
  • 1.5.424 Jun 20261.21.1, 1.210.5 MB1.1k downloads30ad12c4dff9…Get
  • 1.5.213 Jun 20261.21.1, 1.210.5 MB26.5k downloads2b8853952135…Get
  • 1.5.13 Jun 20261.21.1, 1.210.5 MB8.7k downloads461695f7f00b…Get
  • 1.5.03 Jun 20261.21.1, 1.210.5 MB619 downloads4a9d75b5f79c…Get
  • 1.4.320 Dec 20251.20.1, 1.200.5 MB95.3k downloadsaf9faa07be4b…Get
  • 1.4.221 Oct 20251.20.1, 1.200.5 MB32.0k downloads3d49bd20166b…Get
  • 1.4.118 Oct 20251.20.1, 1.200.5 MB1.5k downloads18c0735c16bd…Get
  • 1.4.017 Oct 20251.20.1, 1.200.2 MB400 downloads7272e8ea2f01…Get
  • 1.3.029 Aug 20251.21.1, 1.210.2 MB28.3k downloads400e9af27a38…Get
  • 1.3.11 Aug 20251.20.1, 1.200.4 MB29.7k downloadsf18f9501ac8a…Get
  • 1.2.026 Jan 20251.21.1, 1.210.2 MB66.3k downloads805d1931828a…Get
  • 1.1.110 Nov 20241.21.1, 1.210.1 MB5.3k downloads9dc6414341e2…Get
  • 1.1.05 Nov 20241.21.1, 1.210.1 MB10.7k downloads67f8acb98e34…Get
  • 1.0.28 Oct 20241.21.1, 1.210.1 MB2.7k downloadse960378921ef…Get

Frequently asked

Does Knight Lib work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Knight Lib 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 Knight Lib support?

Everything the author has declared, from 1.19 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Knight Lib on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Knight Lib support?

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

Which Java version do I need for Knight Lib?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What licence is Knight Lib under?

GPL-3.0-only, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Knight Lib?

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 Knight Lib safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

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!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-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+)

Used by

3 projects list Knight Lib as a required dependency.

Knight QuestIntroducing an epic armor quest mod! Adds +30 armor sets, new mobs, and much more!Companions!A mod that adds 10 new tamable creatures called companions!ClockworkClockwork adds a range of mechanical tools and utilities

Details from Modrinth, where the author last updated it on 15 Oct 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .