
ItemDuper-Pro
Perfect for players who want convenient item duplication with modern improvements and reliable functionality.
Screenshots

About this Mod
ItemDuper-Pro
A recreated and enhanced version of the original DupeTrigger mod by AstraLucid
What it does
Press a single keybind to instantly duplicate items in your main hand - no commands, no cheats required!
Key Features
- One-key duplication - Default 'G' key (fully customizable)
- Enhanced stack limits - Duplicate up to 2,048 items per stack
- Server-side synchronization - Real duplication that persists when moved or placed
- Customizable controls - Change keybind in Controls menu under "ItemDuper-Pro"
- No cheats needed - Works in survival mode and multiplayer servers
- Smart inventory management - Handles full inventories gracefully
How to Use
- Hold any item in your main hand
- Press 'G' (or your custom keybind)
- Watch your items double instantly!
- Repeat to keep doubling (1→2→4→8→16→32→64→128→256→512→1024→2048)
Configuration
- Open Options → Controls → Key Binds
- Find "ItemDuper-Pro" category
- Set your preferred key for "Duplicate Item"
Requirements
- Fabric Loader 0.16.14+
- Fabric API
Credits
- Original concept: AstraLucid (DupeTrigger mod)
- Enhanced recreation: Void
Perfect for creative building, testing, and convenient item management!
Available Versions
How to Install ItemDuper-Pro 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 (1.21.7).
Install Mod
Open the mod browser in the dashboard and search for "ItemDuper-Pro". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.7, 1.21.6
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
ItemDuper-Pro 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 (1.21.7). You can switch loaders with one click in the panel.
Is ItemDuper-Pro compatible with fabric?
ItemDuper-Pro officially supports fabric for Minecraft 1.21.7, 1.21.6. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with ItemDuper-Pro – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if ItemDuper-Pro 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.
Rent Modded Server
Install ItemDuper-Pro with just one click on your server.