Artisan Replicator (Easy Duplicating)
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
⬇ Download on CurseForgeThe author built this one for Minecraft 1.21.1 on NeoForge. On other versions it may install and then do nothing.



This mod adds the Artisan Replicator, A block crated with endgame materials that gives you access to duplication. It acts like a furnace, But instead of consuming the input and crafting an item, It inserts a copy in the output slot, and the item is not consumed.
(Yes, you could hypothetically just put coal in the dupe slot, but that's no fun. Plus, the thing about this mod is "easy duping," so I didn't want to go too crazy on balancing).
Here's the layout of the replicator:

- 1st Slot: Boosters (Optional)
- 2nd Slot: Item you want to duplicate.
The lights on the bottom of each slot will glow if items are input correctly, and the machine will start. The bar in the middle will show the progress of the current item. When finished, your duplicated item will be provided in the 3rd slot.
The purple button in the UI can be spam-clicked to speed up the meter.
Boosters



Boosters can also be crafted to speed up the duplication process. There are three levels, and each goes faster the higher you go.
Just in case you don't have JEI, here's the recipe.
Crafting


"Why make this mod?"
Because I'm lazy and there aren't that many 1.21.1 Duplication Mods yet. "Be the change you want to see in the world".
Notes:
- This mod isn't meant to be too balanced, but if people like it enough, I can make a version that has way more steps and balances to and for the replicator.
- This mod is made with Mcreator and is my first ever Java mod, so if something goes wrong error code wise I don't think I can know what's wrong. But please feel free to report and In Game bugs, and I can take a peek.
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- 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 CurseForge — 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 darksduplicator-1.1.0-neoforge-1.21.1.jar — drop this file into the mods folder
- Download size: 184 KB
- Download link checked 28 Sept 2026 — working
These come from our own check of the pack file, not from the source page.