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Fix Alt GrMinecraft mod for 1.21.8

A simple Minecraft mod that (mostly) fixes the MC-127862 bug, which sometimes makes pressing the Alt Gr key lock your left control key in a pressed state.

client onlynewest supported 1.21.8Utility
Latest version
3.0.2+1.21
Minecraft
1.14 to 1.21.8
Java
Java 21+
Loaders
Quilt, Fabric
Licence
LGPL-3.0-only
Downloads
26.6k
Updated
14 mo ago
Available on
Modrinth

Minecraft versions

Every version Fix Alt Gr declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.8Quilt, Fabric21+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
1.21.3Quilt, Fabric21+declared23 Oct 2024
1.21.2Quilt, Fabric21+declared22 Oct 2024
1.21.1Quilt, Fabric21+declared8 Aug 2024
1.21Quilt, Fabric21+declared13 Jun 2024
1.20.6Quilt, Fabric21+declared29 Apr 2024
1.20.5Quilt, Fabric21+declared23 Apr 2024
1.20.4Quilt, Fabric17+declared7 Dec 2023
1.20.3Quilt, Fabric17+declared4 Dec 2023
1.20.2Quilt, Fabric17+declared20 Sept 2023
1.20.1Quilt, Fabric17+declared12 Jun 2023
1.20Quilt, Fabric17+declared2 Jun 2023
1.19.4Quilt, Fabric17+declared14 Mar 2023
1.19.3Quilt, Fabric17+declared7 Dec 2022
1.19.2Quilt, Fabric17+declared5 Aug 2022
1.19.1Fabric, Quilt17+declared27 Jul 2022
1.19Quilt, Fabric17+declared7 Jun 2022
1.18.2Quilt, Fabric17+declared28 Feb 2022
1.18.1Fabric, Quilt17+declared10 Dec 2021
1.18Quilt, Fabric17+declared30 Nov 2021
1.17.1Quilt, Fabric16+declared6 Jul 2021
1.17Quilt, Fabric16+declared8 Jun 2021
1.16.5Quilt, Fabric8+declared14 Jan 2021
1.16.4Quilt, Fabric8+declared29 Oct 2020
1.16.3Quilt, Fabric8+declared10 Sept 2020
1.16.2Fabric, Quilt8+declared11 Aug 2020
1.16.1Quilt, Fabric8+declared24 Jun 2020
1.16Quilt, Fabric8+declared23 Jun 2020
1.15.2Fabric, Quilt8+declared17 Jan 2020
1.15.1Quilt, Fabric8+declared16 Dec 2019
1.15Quilt, Fabric8+declared9 Dec 2019
1.14.4Quilt, Fabric8+declared19 Jul 2019
1.14.3Quilt, Fabric8+declared24 Jun 2019
1.14.2Quilt, Fabric8+declared27 May 2019
1.14.1Quilt, Fabric8+declared13 May 2019
1.14Quilt, Fabric8+declared23 Apr 2019

Download

From Fix Alt Gr’s own host. Nothing is re-hosted here.

3.0.2+1.21release19 Jul 2025

fix-alt-gr-3.0.2+1.21.jar · 0.6 MB · for 1.21.8, 1.21.7, 1.21.6, 1.21.5, 1.21.4 +4 more

Download latest
9f3f383a2cac…
Older versions13
  • 3.0.1+1.2118 Jan 20251.21.6, 1.21.5, 1.21.4, 1.21.3, 1.21.2 +2 more0.6 MB603 downloads105668263387…Get
  • 3.0.0+1.1925 Jun 20241.19.4, 1.19.3, 1.19.2, 1.19.1, 1.190.6 MB171 downloads662a2b7cf50e…Get
  • 3.0.0+1.2025 Jun 20241.20.6, 1.20.5, 1.20.4, 1.20.3, 1.20.2 +2 more0.6 MB763 downloads3c33d984f949…Get
  • 3.0.0+1.2124 Jun 20241.21.4, 1.21.3, 1.21.2, 1.21.1, 1.210.6 MB4.2k downloads5ab121a3ae80…Get
  • 2.0.3+1.209 Jun 20231.20.4, 1.20.3, 1.20.2, 1.20.1, 1.200.6 MB264 downloadsa4b1ba142ed4…Get
  • 2.0.3+1.19.33 Mar 20231.19.30.6 MB2.6k downloads5a6a72db06c8…Get
  • 2.0.2+1.19.316 Dec 20221.19.30.6 MB350 downloads59d5209d3ad8…Get
  • 1.0.1+1.14-1.1618 Jul 20221.16.5, 1.16.4, 1.16.3, 1.16.2, 1.16.1 +9 more0.7 MB16.0k downloadse8bb1b309e0c…Get
  • 1.0.1+1.1718 Jul 20221.17.1, 1.170.7 MB160 downloads79a7f01a5d47…Get
  • 2.0.1+1.1916 Jul 20221.19.2, 1.19.1, 1.190.6 MB184 downloads1c7176d8ee6e…Get
  • 2.0.0+1.1915 Jul 20221.190.6 MB120 downloads143b172def22…Get
  • 1.0.1+1.1815 Jul 20221.18.2, 1.18.1, 1.180.7 MB220 downloads54afbb21132c…Get
  • 1.0.0+1.1815 Jul 20221.18.20.7 MB122 downloadsbc4104dc3148…Get

Frequently asked

Does Fix Alt Gr work on Minecraft 1.21.8?

Yes. 1.21.8 is the newest Minecraft version Fix Alt Gr 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 Fix Alt Gr support?

Everything the author has declared, from 1.14 up to 1.21.8. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Fix Alt Gr 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 Fix Alt Gr support?

Quilt, 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 Fix Alt Gr?

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 Fix Alt Gr 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 Fix Alt Gr?

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 Fix Alt Gr 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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Last checked 2 mo ago against Modrinth. 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? .