Item Duper Dupe items directly from a simple GUI — no commands needed. Press K (configurable) to open the Item Duper menu. Hold any item in your main hand and click Dupe Item to instantly duplicate it into your inventory. Features
🎮 Simple and clean GUI ⌨️ Keybind to open the menu (default: K) 📦 Copies full item data — including Shulker Box contents (Creative mode) ✅ Works in Creative mode (full NBT copy) ✅ Works in Survival/Adventure with OP permissions (via /give) 🔁 Compatible with Minecraft 1.21 – 1.21.11
How to use
Hold the item you want to duplicate in your main hand Press K to open the menu Click Dupe Item Done!
Notes
In Creative mode, items are duplicated with full data (enchantments, NBT, Shulker Box contents) In Survival/Adventure, requires OP or cheats enabled — item data will be transferd when u use the mod 2.0.0 or higher
Requirements
Fabric Loader ≥ 0.15.0 Fabric API Minecraft 1.21 – 1.21.11
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as item-duper-1.0.0.jar — drop this file into the mods folder
- Download size: 12 KB
- Download link checked 30 Aug 2026 — working
These come from our own check of the pack file, not from the source page.