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mod

Don't Do ThatMinecraft mod for 1.21.9

Stops Minecraft from doing certain annoying things.

client onlynewest supported 1.21.9UtilityOptimizationCursed
Latest version
1.4.1+1.21.9
Minecraft
1.21 to 1.21.9
Java
Java 21+
Loaders
Fabric, Quilt
Licence
LGPL-3.0-only
Downloads
5.6k
Updated
12 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Don't Do That servers

One click and Don't Do That is installed with the right loader, on hardware built for it.

  • 1.21.9
  • Fabric
  • Quilt
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version Don't Do That declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.9Fabric, Quilt21+declared30 Sept 2025
1.21.8Fabric, Quilt21+declared17 Jul 2025
1.21.7Quilt, Fabric21+declared30 Jun 2025
1.21.6Fabric, Quilt21+declared17 Jun 2025
1.21.5Quilt, Fabric21+declared25 Mar 2025
1.21.4Quilt, Fabric21+declared3 Dec 2024
1.21.2Quilt, Fabric21+declared22 Oct 2024
1.21.1Fabric, Quilt21+declared8 Aug 2024
1.21Quilt, Fabric21+declared13 Jun 2024

Download

From Don't Do That’s own host. Nothing is re-hosted here.

1.4.1+1.21.9release3 Oct 2025

dontDoThat-1.4.1+1.21.9.jar · 35 KB · for 1.21.9

Download latest
cb878e8ce807…
Older versions8
  • 1.4.1+1.21.53 Oct 20251.21.8, 1.21.7, 1.21.6, 1.21.538 KB220 downloads8c089fc0cf19…Get
  • 1.4.0+1.21.53 Oct 20251.21.538 KB47 downloads61c61923cdfc…Get
  • 1.4.0+1.21.43 Oct 20251.21.438 KB163 downloadsff66bd6e4633…Get
  • 1.21-1.21.2_1.3.013 Jun 20251.21.2, 1.21.1, 1.2134 KB843 downloads7757d0cae658…Get
  • 1.21.4_1.3.013 Jun 20251.21.434 KB295 downloads3f08bfa7e48c…Get
  • 1.21-1.21.2_1.2.06 Jun 20251.21.2, 1.21.1, 1.2128 KB75 downloadsb0843c69186a…Get
  • 1.21-1.21.2_1.1.030 Sept 20241.21.2, 1.21.1, 1.2126 KB3.6k downloads380cd65a7f8b…Get
  • 1.21-1.21.2_1.0.030 Sept 20241.21.1, 1.2121 KB108 downloadsbfeda1a37baf…Get

Frequently asked

Does Don't Do That work on Minecraft 1.21.9?

Yes. 1.21.9 is the newest Minecraft version Don't Do That 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 Don't Do That support?

Everything the author has declared, from 1.21 up to 1.21.9. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Don't Do That on the client or the server?

The client only. There is nothing to install on the server side. That is the author's declared design, not a guarantee for every server: one running anti-cheat or missing a counterpart mod can still object.

Which platform or loader does Don't Do That support?

Fabric, Quilt. 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 Don't Do That?

On the newest Minecraft version it supports, Java 21 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 Don't Do That under?

LGPL-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 Don't Do That?

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 Don't Do That 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 3 Oct 2025. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Not indexed yet. Score 53 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .