Itematic
by ErrorCraft
Itematic lets pack makers define new items with data files on Fabric, without writing Java code, and it covers custom items, item events and villager trades.
What it does
Items are described in data rather than compiled code, so a pack can add new items and change how existing ones behave. The library is aimed at developers and pack makers who need items that go beyond what datapacks alone can express. Its author notes a repository with examples for anyone starting out.
Itematic is a Library, with Technology and Utility as secondary categories. Servers that run it need every player to install it too. Files are published for Fabric only, across 12 release versions 1.20.5 – 26.3, and snapshot builds are published as well. The latest Fabric file is 0.9.0-preview.2+26.3 for 26.3, released on 2026-10-13 on the beta channel. The code is open source under the Apache License 2.0.
Key features
Custom items
Pack makers can define items with their own properties and behavior through data files.
Customisable creative inventory stacks
The stacks shown in the Creative inventory can be set, so a pack controls which variants appear there.
Item events
Actions can run when an item is used, which lets a custom item respond to player input.
Villager trades
Custom items can be offered in villager trades, so a pack can add new goods to the economy.
Actions with contexts
Actions draw on several kinds of context, so the same action can behave differently depending on where it fires.
Gallery
Compatibility
Latest build for each game version and loader.
26.x4 of 4 versions with builds
1.21.x6 of 6 versions with builds
1.20.x2 of 2 versions with builds
This mod also publishes snapshot builds. Snapshots are not shown in the matrix.
Use cases
Pack authoring
A pack maker adds items with unique behavior without writing a mod in Java.
Custom economies
A server adds items to villager trades to shape how players earn and spend in-game currency.
Who it’s for: Developers and pack makers who want to create items with data files on Fabric. Players of an existing pack get the items only if the pack includes them.
How it compares
Custom Content Packs is a Fabric mod for 1.17 – 1.17.1, released under the MIT License and open source, and it runs on client and server. Creative Menu Tweaks is a Fabric mod for 1.20.1 – 1.21.5, released under the MIT License and open source, and it is client required with server optional. Booklet is server-side only, open source under the GNU Lesser General Public License v3.0 only, and covers 1.21.11 – 26.3.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Itematic | Fabric | 1.20.5 – 26.3 | Client and server | 2026-10-13 |
| Custom Content Packs | Fabric | 1.17 – 1.17.1 | Client and server | 2021-11-19 |
| Creative Menu Tweaks | Fabric | 1.20.1 – 1.21.5 | Client required, server optional | 2025-07-25 |
| Booklet | Fabric | 1.21.11 – 26.3 | Server-side only | 2026-09-11 |
Questions
Does Itematic need to be installed on both sides?
Which loaders does Itematic support?
Which game versions have files?
Can a pack use Itematic without Java code?
In the catalog
Itematic is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 8,071 mods support Minecraft 26.3.
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Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/itematic
- Owner
- ErrorCraft
- Published
- 2025-05-07
- Updated on Modrinth
- 2026-10-13
- Facts verified
- 2026-10-15