Zonne's Duplication

Allows simple highly configurable item duplication in minecraft.

552 Downloads

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About this Mod

Zonne's Duplication Mod

This mod adds a simple highly configurable duplication command working with cheats disabled.

Features:

/dupe (amount*dupeamount)
/megadupe (amount^dupeamount)
/d and /md (Shortened variants of the commands above)

The configuration file allows setting a duplication limit to both commands individually, setting command error messages, and allows disabling any of the 4 added commands.

There is also an option to have duplicating cost XP levels or points, and one to disable bottle of enchanting duplication.

The mod also includes a helpful unstackable item fix making megadupe function like normal dupe with unstackable items (can be disabled in config)

Zonnes Duplication was tested on 1.21.4 and 1.21.8, but works on any version inbetween.

Join the discord for support or for reporting bugs.

Available Versions

Zonne's Duplication 1.2.0release

MC 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8neoforge

September 19, 2025

Zonne's Duplication 1.1.0release

MC 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8neoforge

September 14, 2025

How to Install Zonne's Duplication on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.8).

Install Mod

Open the mod browser in the dashboard and search for "Zonne's Duplication". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.8, 1.21.7, 1.21.6 (+2 more)

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Zonne's Duplication server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.8). You can switch loaders with one click in the panel.

Is Zonne's Duplication compatible with neoforge?

Zonne's Duplication officially supports neoforge for Minecraft 1.21.8, 1.21.7, 1.21.6. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Zonne's Duplication – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Zonne's Duplication consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.