Omni Dev
by DeadlyHunter
Omni Dev is a Forge toolkit for in-game structure building and loot table creation, aimed at mod developers and map makers who want to test vanilla mechanics.
What it does
Players and developers use an in-game developer toolkit to build a structure, place chests in it, and assign each chest a custom loot table through a GUI. A selection wand picks the building to work on, and a setloot command links a chest to a saved table. The finished structure is saved as a completed NBT file together with randomized loot tables inside it.
Generated NBT and JSON files are exported automatically into a generated/omnidev folder inside the world save. Those files can be reused in a custom map or mod. Installing the mod on both the client and the server is required, since it runs on client and server together. It is published for Forge only, across six game versions 1.20.1 – 1.20.6, under All rights reserved, so it is not open source.
Key features
In-game structure builder
Structures can be assembled in the world with the developer toolkit, including chests placed as part of the build.
Custom loot table GUI
A loot generator screen lets the user create custom loot and save it as a table for later use.
Chest loot assignment
The setloot command assigns a saved loot table to a chosen chest, selected with the Omni Dev Wand.
Automatic file export
Structures and loot data are written as NBT and JSON files into the world save's generated folder.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Custom dungeons
A map maker can build a dungeon with working chests and tune the loot in each one.
Testing vanilla mechanics
A developer can check how vanilla loot and structure behavior works inside a custom map or modpack.
Who it’s for: Mod developers and custom map creators working on Forge 1.20.1 – 1.20.6 who need to build structures, place chests and test loot tables without writing every file by hand.
Questions
Does Omni Dev have to be installed on the server?
Which loaders and versions does Omni Dev support?
Where are the generated structure and loot files saved?
More from DeadlyHunter
What the author says
Omni Dev ist a utility mod designed by developers, for developers. Whether you are making a massiv mod, a coustom map, or just want to test vanilla mechanics. All generated.nbt an.json files are automatically exported to your saves/YOUR_WORLD/generated/omnidev/ folder. Build your structure and place your chests…
Official listing
- Modrinth page
- modrinth.com/mod/omni-dev
- Owner
- DeadlyHunter
- Published
- 2026-05-20
- Updated on Modrinth
- 2026-05-29
- Facts verified
- 2026-10-15