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Karn's Useful CommandMinecraft mod for 26.3

Unlock player NBT manipulation, Use various useful commands! Useful for datapack makers.

server onlynewest supported 26.3UtilityGame MechanicsManagementMinigame
Latest version
2.2-21.11
Minecraft
1.19.4 to 26.3
Java
Java 25+
Loader
Fabric
Licence
LicenseRef-All-Rights-Reserved
Downloads
6.0k
Updated
4 d ago
Available on
Modrinth
Space NodeOur hosting

Host Karn's Useful Command servers

One click and Karn's Useful Command is installed with the right loader, on hardware built for it.

  • 26.3
  • Fabric
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Karn's Useful Command declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
26.3Fabric25+declared15 Sept 2026
1.21.11Fabric21+declared9 Dec 2025
1.21.10Fabric21+declared7 Oct 2025
1.21.8Fabric21+declared17 Jul 2025
1.21.7Fabric21+declared30 Jun 2025
1.21.5Fabric21+declared25 Mar 2025
1.21.4Fabric21+declared3 Dec 2024
1.21.1Fabric21+declared8 Aug 2024
1.21Fabric21+declared13 Jun 2024
1.20.6Fabric21+declared29 Apr 2024
1.20.5Fabric21+declared23 Apr 2024
1.20.1Fabric17+declared12 Jun 2023
1.20Fabric17+declared2 Jun 2023
1.19.4Fabric17+declared14 Mar 2023

Download

From Karn's Useful Command’s own host. Nothing is re-hosted here.

2.2-21.11release14 Jan 2026

karns_UsefulCommand-2.2-21.11.jar · 58 KB · for 1.21.11

Download latest
eac5f5839975…
Older versions10
  • 2.2-21.1014 Jan 20261.21.1046 KB30 downloads75a053ee69f0…Get
  • 2.2-21.721 Jul 20251.21.8, 1.21.746 KB206 downloadse17f92e6698f…Get
  • 2.212 May 20251.21.5, 1.21.4, 1.20.146 KB1.4k downloadsb0cf5d0ad691…Get
  • 2.19 Feb 20251.21.445 KB69 downloads7f36cac9dc29…Get
  • 2.022 May 20241.20.6, 1.20.539 KB141 downloads0ca1d429e8a7…Get
  • 1.415 Aug 20231.20.1, 1.20, 1.19.437 KB2.5k downloads38cdbc3829ce…Get
  • 1.328 Jun 20231.20.1, 1.20, 1.19.432 KB108 downloadsd5dba9131da3…Get
  • 1.211 May 20231.19.481 downloads
  • 1.18 May 20231.19.426 KB76 downloads4dfb2fc696b3…Get
  • 1.07 May 20231.19.418 KB87 downloadsc51ca5a13192…Get

Frequently asked

Does Karn's Useful Command work on Minecraft 26.3?

Yes. 26.3 is the newest Minecraft version Karn's Useful Command 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 Karn's Useful Command support?

Everything the author has declared, from 1.19.4 up to 26.3. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Karn's Useful Command on the client or the server?

The server only. Players join with an ordinary Minecraft client and install nothing.

Which platform or loader does Karn's Useful Command support?

Fabric. 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 Karn's Useful Command?

On the newest Minecraft version it supports, Java 25 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Karn's Useful Command under?

LicenseRef-All-Rights-Reserved, 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 Karn's Useful Command?

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 Karn's Useful Command 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. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

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

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Details from Modrinth, where the author last updated it on 29 Sept 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .