Source-checkedBuilding & decoration

Dupe Fix

by TreeOfSelf · for Minecraft

A simple drop-in mod to prevent all forms of duping. TNT-Duping, Gravity block duping, and much more will not work with this mod enabled.

10KDownloads
16d agoLast updated
CC0-1.0License
FabricLoaders

About Dupe Fix

From Modrinth

A simple drop-in mod to prevent all forms of duping. TNT-Duping, Gravity block duping, and much more will not work with this mod enabled.

Dupe Fix by TreeOfSelf

Dupe Fix

Description

A simple drop-in plugin to prevent all forms of duping. This will prevent TNT Duping, Trident Dupe, Gravity block duping, and various other forms of duplicating items. (Some dupes patched by this mod may already be fixed by Mojang, feel free to open an issue)

Configuring

config/PandaAntiDupe.json generated at runtime, a true/false entry for each dupe patch exists

{
  "BookDupe": true,
  "ShulkerBoxDupe": true,
  "RailDupe": true,
  "HorseQuickMoveDupe": true,
  "StackSplitDupe": true,
  "HopperDupe": true,
  "PistonDupe": true,  //this is the TNTDuping one
  "EntityDimensionDupe": true,
  "TridentDupe": true,
  "BeeDupe": true,
  "TripwireDupe": true,
  "LecternDupe": true,
  "TripwireHookDupe": true,
  "GravityBlockDupe": true,
  "NBTListDupe": true
}

Simply set to false to disable

Try it out

Hardcore Anarchy Skyblock Anarchy

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All my mods

Support

Support discord here!

License

CC0

Highlights

From source data

Game versions

Supports 13 Minecraft versions, the newest being 26.3.

Loaders

Runs on Fabric.

Footprint

Rated a light load on a server.

Dupe Fix on Nxeon

From our catalogue
One-click install
Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
Server side
Required on the server
Server type needed
Fabric
Server load
light
Smallest plan we suggest
Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
Latest build
1.1.4+26.3, released 2026-10-19

Game versions by loader

LoaderGame versionsNewest
Fabric1.21.11 to 26.3 (5 versions)26.3

From 5 recorded builds of Dupe Fix.

Recent builds

BuildReleasedGame versionsLoaders
1.1.4+26.32026-10-1926.3Fabric
1.1.2+26.32026-10-0426.3Fabric
1.1.1+26.22026-06-2626.2Fabric
1.1.1_26.1.12026-06-0726.1.1 to 26.1.2 (2 versions)Fabric
1.1.0_1.21.112025-12-121.21.11Fabric

Dependencies

  • Required: modrinth project P7dR8mSH (modrinth, not in our catalogue)

Declared by the newest build that lists any. Required ones are installed with it on one-click installs.

Run Dupe Fix on a Minecraft server

Pick a server or deploy a new one above; it is installed in one click.

What kind of mod it is

From the catalog
Listed on Modrinth as “Mods”

Building & decoration

Blocks, furniture, decorations and building tools.

Runs on your server

From source side support

Modrinth lists Dupe Fix as required on the server. Check its Modrinth page to see whether players need it too.

Compatibility

Game
Minecraft
Loaders
Fabric
Runs on
Serverrequired on the server
Game versions
26.3 and 12 earlier

Verified at the source

  • ✓ModrinthOfficial listing, checked 2026-10-25Open ↗
  • ✓AuthorTreeOfSelf, as published on Modrinth
  • ✓LicenseCC0-1.0Free

Dupe Fix, answered

Generated from the mod’s own source data.

Do my players need to install Dupe Fix?

Modrinth lists Dupe Fix as required on the server. Check its Modrinth page to see whether players need it too.

Which loaders does it support?

Fabric.

Is it free?

Yes. Dupe Fix is free to download from Modrinth. Its license is CC0-1.0.

How do I add it to my Nxeon server?

Use “Add to a server” on this page, or open NxLabs from your dashboard. We install it, restart your server and switch it on.

NxLabs

Run Dupe Fix on a Minecraft server.

Deploy in about a minute from $4.99 a month, then add Dupe Fix in one click.