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AntiFirmament

Removes the dreadful packet Firmament attempts to send to servers (e.g., Hypixel), which shows your mod IDs when Fabric itself doesn't.

client onlynewest supported 26.1.2UtilityGame MechanicsLibraryOptimization
Latest version
no release indexed
Loader
Fabric
Licence
MIT
Downloads
5.7k
Updated
1 mo ago
Available on
Modrinth

Minecraft versions

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

Other mods
MinecraftThroughJavaEvidenceReleased
26.1.2Fabric25+declared9 Apr 2026
1.21.11Fabric21+declared9 Dec 2025
1.21.10Fabric21+declared7 Oct 2025

Frequently asked

Does AntiFirmament work on Minecraft 26.1.2?

Yes. 26.1.2 is the newest Minecraft version AntiFirmament 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 AntiFirmament support?

Everything the author has declared, from 1.21.10 up to 26.1.2. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install AntiFirmament on the client or the server?

The client only. There is nothing to install on the server, so it works on any server you can already join.

Which loader does AntiFirmament need?

Fabric. 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 AntiFirmament?

Java 25 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.

What licence is AntiFirmament under?

MIT, 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 AntiFirmament?

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 AntiFirmament safely?

From the author's own page on Modrinth, 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 Minecraft version coverage overlaps, not by popularity.

Last checked 1 d ago against Modrinth. We do not host files and we do not republish descriptions; every download link points at the author’s own release.