
Modrinth · Minecraft mod
Dupe Fix
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.
Quick answer
Which Dupe Fix release should I use?
Dupe Fix 1.1.4+26.3 targets 26.3 with Fabric. Do not install it on the client. It must be installed on the dedicated server. All 1 required mods have matching files.
Where it goes
Is Dupe Fix required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
This file is marked server-only.
What else does Dupe Fix 1.1.4+26.3 need?
1.1.4+26.3. Change the file and its required mods may change too.
Install Fabric API first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Dupe Fix without breaking your instance.
Built for Dupe Fix 1.1.4+26.3. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.1.4+26.3. It targets 26.3 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric API first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.1.4+26.3. It opens that exact file at the source.
About this project
What does Dupe Fix add?

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
hardcoreanarchy.gay (Deathban Anarchy)sky.hardcoreanarchy.gay (Skyblock Anarchy)
More mods
Anti-Exploit - A drop-in mod for preventing common exploits. Fully configurable and works well alongside other anti-cheats like GrimAC.
No Lag - Stop common causes of lag on your server. Configure to your likings.
TNT Fusion - Stop massive amounts of TNT from lagging or crashing your server
Attribute Swapping Fix - Simple drop-in mod to stop Attribute Swapping / Breach Swapping on Fabric
Issues
Bugs and problems go on GitHub Issues. There is no Discord support.
License
Project description from Modrinth.
Pick your setup
Dupe Fix by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.3
1 loader build26.2
1 loader build26.1.2
1 loader build26.1.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.9
1 loader build1.21.8
1 loader build1.21.7
1 loader build1.21.6
1 loader build1.21.5
1 loader build1.21.4
1 loader buildShowing the newest 12 of 13 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Dupe Fix versions and loaders
1.1.4+26.3
panda-anti-dupe-1.1.4+26.3.jar
19 Oct 2026
1.1.2+26.3
panda-anti-dupe-1.1.2+26.3.jar
4 Oct 2026
1.1.1+26.2
panda-anti-dupe-1.1.1+26.2.jar
26 Jun 2026
1.1.1_26.1.1
panda-anti-dupe-1.1.1_26.1.1.jar
7 Jun 2026
1.1.0_1.21.11
panda-anti-dupe-1.1.0_1.21.11.jar
12 Dec 2025
1.1.0_1.21.9+1.21.10
panda-anti-dupe-1.1.0_1.21.9+1.21.10.jar
9 Oct 2025
1.1.0_1.21.1
panda-anti-dupe-1.1.0_1.21.1.jar
21 Jul 2025
1.1.0_1.21.6+1.21.7
panda-anti-dupe-1.1.0_1.21.6+1.21.7.jar
2 Jul 2025
1.1.0_1.21.5
panda-anti-dupe-1.1.0_1.21.5.jar
20 May 2025
1.1.0_1.21.4
panda-anti-dupe-1.1.0_1.21.4.jar
8 Mar 2025
1.0.1_1.21.4
panda-anti-dupe-1.0.1_1.21.4.jar
21 Dec 2024
1.0.0_1.21.4
panda-anti-dupe-1.0.0_1.21.4.jar
17 Dec 2024
Looking for an older file? The official Modrinth project page is in Resources.


