DupeTrigger
Adds a keybind to dupe the item's you're holding!
Screenshots
About this Mod
This mod adds a keybind that doubles the item in your main-hand. The default keybind is "g", but you can change it in the Controls menu under the DupeTrigger section.
It works when cheats are disabled.
There was a mod named DupeTrigger on curseforge, but it hasn't been updated to 1.21 due to the changes made in 1.21. I really liked this mod so I figured I would just make it myself. (This is my first mod)
The Stackable mod allows you to have more than 99 items in your hand when the game saves (it would crash otherwise). The item count will be saved upon closing the world.
Stackable also doubles the max stack size by default for every item. To fix this, go into
%appdata%./minecraft/config
and look for Stackable.json. Inside you can fix all the item stack sizes.
Available Versions
How to Install DupeTrigger on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.4).
Install Mod
Open the mod browser in the dashboard and search for "DupeTrigger". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.4
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
DupeTrigger server crashes on startup – what to do?
Most common cause: wrong fabric 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 (1.21.4). You can switch loaders with one click in the panel.
Is DupeTrigger compatible with fabric?
DupeTrigger officially supports fabric for Minecraft 1.21.4. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with DupeTrigger – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if DupeTrigger 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.
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Rent Modded Server
Install DupeTrigger with just one click on your server.