Only One Item
by kltyton
With Only One Item, duplicate items from different mods in a modpack are replaced by a single item during data loading, so recipes and loot tables use one type.
What it does
Large modpacks often ship several items that do the same job, such as more than one kind of tomato or silver ore. This Fabric mod maps those duplicates onto one chosen item by replacing them when data is loaded, which covers recipes, loot tables and other JSON-defined content. Replacement happens before the world loads, so world loading speed is not affected by it.
The mod was created to standardize items for one modpack, and it can be used in other packs or on servers. Unlike earlier item-merging approaches, it changes items at the data loading stage rather than afterwards. If an item manager is installed, only one manager is supported at this time. Only One Item is for Fabric, released for 1.20.1, and it needs to run on both the client and the server. Its code is open source under the GNU Lesser General Public License v3.0 or later.
Key features
Duplicate item replacement
Items listed in a replacement map are swapped for one chosen item across JSON-defined data.
Data loading stage
Replacement runs while data is read, so recipes and loot tables already reference the unified item.
Configurable mapping
The mapping lists each target item with the duplicates it absorbs, for example farmersdelight:onion.
Item manager support
When an item manager is installed, the supported manager displays the unified items.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Modpack standardization
Pack authors can merge duplicate crops or ores that come from separate mods into one entry.
Server consistency
Server owners can apply the same mapping on a server so every player sees the same item set.
Who it’s for: Modpack authors and server owners who run several mods that add overlapping items, and who want recipes and loot tables to use a single item type.
Questions
Does Only One Item need to be installed on the server?
Which game version is Only One Item built for?
Does Only One Item work with other item managers?
In the catalog
Only One Item is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 34,764 mods support Minecraft 1.20.1.
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What the author says
This mod is designed to unify duplicate item types that appear in large modpacks (for example, multiple kinds of tomatoes or silver ore). Commissioned by @Limit小火柴, it is mainly created for the Utopia modpack to standardize various items, but it can also be used in other modpacks or on servers. Unlike One Enough…
Official listing
- Modrinth page
- modrinth.com/mod/only-one-item
- Owner
- kltyton
- Published
- 2025-08-15
- Updated on Modrinth
- 2026-02-09
- Facts verified
- 2026-10-15