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Resources / Mods / AltHalt

AltHalt

AltHalt is a client-side Fabric mod that helps prevent accidental server joins with the wrong account or a previously shared public IP.

ModsFree26.x
by GoodrichDev · listed from Modrinth
Download › Install with the launcher

Opens Modrinth · 15 downloads there

AltHalt screenshot 1AltHalt screenshot 2AltHalt screenshot 3

What it does

AltHalt is a client-side Fabric mod that helps prevent accidental server joins with the wrong account or a previously shared public IP.

AltHalt is a resource made by GoodrichDev. It supports Minecraft 26.x. It has been downloaded 15 times on Modrinth. The last update came out on Sep 16, 2026.

Supported versions

26.x

Release history

The newest is 1.0.0, released on Sep 16, 2026. It is made for Minecraft 26.2. It runs on Fabric. The download is 66 KB.

VersionReleasedMinecraftType
1.0.0Sep 16, 202626.2Release

Latest release on GitHub

AltHalt is open source. Its newest release on GitHub is AltHalt 1.0.0, published on Sep 16, 2026.

AltHalt 1.0.0 is a client-side Fabric mod that helps prevent accidental server joins with the wrong account or a previously shared public IP.

Requirements

  • Minecraft Java 26.2
  • Fabric Loader 0.19.5 or newer
  • Java 25
  • Fabric API is not required

Included

  • Per-server UUID locks and persistent Same-IP history shared across launcher profiles on the same OS account.
  • Account-verified server-list pings and Refresh support.
  • A Multiplayer management menu for recent blocks, known alts, server locks, and active exemptions.
  • One-hour and permanent exemptions, scoped to the account, server, and failed rule. Same-IP exemptions cover only the recorded conflicting addresses.
  • Alt-label and server-lock editing, confirmed removal, exemption revocation, and migration of existing history.

Install

Download althalt-1.0.0.jar and place it in your Fabric instance's mods directory. Remove any older AltHalt JAR. Open Multiplayer > AltHalt to configure your accounts and server locks. The -sources.jar is for developers and should not be installed as a mod.

Protection limits

Read all release notes on GitHub

Description from the author on Modrinth

AltHalt is a client-side Fabric mod that helps prevent accidental server joins with the wrong account or a previously shared public IP. No more accidental Operational Security errors that expose your alt accounts or private identities to server admins or server staff.

Written by GoodrichDev. Read it with pictures on Modrinth.

How to install AltHalt

  1. This mod runs only on your own game. Servers do not need it, so you can use it on any server.

  2. Install Fabric for Minecraft 26.x.

  3. Download the .jar file from Modrinth and put it in the mods folder of your .minecraft directory.

  4. Start Minecraft with the Fabric profile.

  5. With the CraftRank Launcher you can skip these steps: open Mods, search for AltHalt and click Install.

Compatibility

Minecraft versions
26.x
Runs on
Fabric
Where it runs
Client only (your game)
Edition
Java
Needs
Nothing else
License
Free to use
Price
Free
Upkeep
Actively updated (Nov 10, 2026)

AltHalt compared with similar ones Compare all alternatives

ResourceDownloadsVersionsLast updatePrice
AltHaltthe one you looked at1526.xSep 16, 2026Free
StendhalNebSpacefarer9.3M1.16 – 26.xSep 20, 2026Free
Chat PatchesOBro19617.3M1.18 – 26.xOct 4, 2026Free
IJM's TweaksItsJustMiaouss2.9M1.20 – 26.xOct 3, 2026Free

Questions

Does AltHalt work on Minecraft 26.x?

Yes. AltHalt supports Minecraft 26.x. All supported versions: 26.x.

Is AltHalt free?

Yes. AltHalt is free to download from Modrinth.

Is AltHalt client-side or server-side?

Client-side. AltHalt goes in your own mods folder and works on any server, including servers without mods.

Is AltHalt still updated?

Yes. The last update came out in the past day.

What are the best alternatives to AltHalt?

The closest ones are Stendhal, Chat Patches and IJM's Tweaks. Compare all alternatives

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