Dupe Mod (1.21.5, 1.20.1) – Minecraft Item Duplication Tool for Testing & Exploit Detection

visibility 2 ❘Author: timetravelbeard ❘ 3 seconds ago ❘
extension Available for: Fabric
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The Dupe Mod (1.21.5, 1.20.1) is a utility tool designed for players and testers who are exploring potential duplication glitches in Minecraft either for patching, private experimentation, or discovering server-specific exploits like those found on Donut SMP. Rather than offering a fixed duplication method, the mod includes a user interface and tools that make testing various dupe scenarios faster and more accessible.

Whether you’re a developer testing server vulnerabilities or a player experimenting with mechanics, this mod gives you a controlled environment to investigate and attempt item duplication exploits more efficiently.

Dupe Mod

Features:

  • Duplication Testing Interface:
    • Built-in GUI that helps simulate common duplication conditions.
    • Allows quick access to testing actions such as item movement, inventory syncing, and timed drops.
  • Server-Specific Use Cases:
    • Known to assist in testing or triggering dupe methods on popular anarchy-style servers like Donut SMP, where mechanics may be less restricted.
  • No Pre-Built Dupe Method:
    • Does not come with a guaranteed duplication exploit.
    • Instead, it facilitates the process of experimenting with existing or newly discovered duplication bugs.
  • Fabric Support:
    • Available for Fabric modloader, working client-side with optional server testing environments.
  • For Testing and Research Purposes:
    • Can be used by server admins, mod developers, or exploit hunters to locate and reproduce dupe bugs.

Screenshots:

Dupe Mod Screenshots 1

Dupe Mod Screenshots 2

Dupe Mod Screenshots 3

Dupe Mod Screenshots 4

How to use

After installation, the mod adds new interface options to Minecraft’s inventory screen. On servers with ShulkerPacks installed, players can attempt to duplicate any item stored inside a Shulker Box using these interface tools.

Requires:

Fabric API

How to install:

How To Download & Install Mods with Minecraft Forge

How To Download & Install Fabric Mods

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Why use Dupe Mod?

Dupe Mod is not a “one-click dupe” exploit tool. Instead, it’s a research and testing utility made for those who actively explore Minecraft’s item handling mechanics whether to find exploits or fix them. It’s especially useful in sandbox or anarchy environments where dupe bugs are part of the meta. If you’re interested in testing possible glitches, stress-testing server sync, or reverse-engineering known exploits, this mod provides the tools to streamline that process.

FAQs

Does this mod provide a working dupe method?

No. It only assists in **finding or testing** duplication glitches. It doesn’t guarantee duplication success on its own.

Is this allowed on multiplayer servers?

Usually not. Using this mod to exploit servers may violate server rules. Always get permission from server admins if using it for testing purposes.

Is this a client-side or server-side mod?

It is a client-side tool but can interact with server mechanics if they are vulnerable to known exploits.

Can this help fix duplication bugs?

Yes. It’s useful for server developers or plugin authors trying to replicate and patch dupe exploits.

Does it work on Donut SMP or similar servers?

The mod is commonly used to test Donut SMP-style duplication methods, but success depends on the current state of server patches and mechanics.

Download links

1.19.2, 1.19.1, 1.19
1.19.3
1.19.4
1.20.1, 1.20
1.20.2
1.20.4
1.20.6
1.21
1.21.1
1.21.3
1.21.4
1.21.5