Locked In
Locked In gives vanilla chests and other containers a lock that a Master Key can open, with copies and cleaning handled as separate steps.
What it does
Locked In overhauls the lock feature that vanilla Minecraft keeps mostly hidden, turning it into a set of usable tools for locking storage. A locked container can be opened with a key that matches it, and a Master Key opens any lock the mod creates. Keys can be duplicated and cleaned, so a lock can be shared or reset without crafting a new one.
The mod is built around storage on multiplayer servers and in shared bases, where players need to keep items away from others. Installation needs Cardinal Components API and Fabric API, and the mod runs on Fabric and Quilt. Environment is client and server, so the server and every player need it. Builds cover 1.21 – 1.21.1, and the code is open source under the MIT License.
Key features
Overhauled vanilla lock
The lock feature that vanilla includes but rarely exposes is reworked into a usable system for storage containers.
Master Key
A single key can open any lock the mod creates, so an owner can reach every locked container without carrying many keys.
Unbreakable lock
A lock cannot be destroyed by breaking the container it protects, keeping storage protected from simple removal.
Key duplication and cleaning
Keys can be copied to share access, and cleaning removes a key's binding so it can be reused for another lock.
EMI support
Locks and keys show up in EMI, the recipe and item viewer, so players can look up how they are made.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Who it’s for: Players who run shared bases or multiplayer servers and want locked storage, and server owners who need a lock system that stays on the server side for everyone who joins.
How it compares
Lock and Key is a Fabric, Forge, NeoForge and Quilt mod for 1.21 – 1.21.1 is needed on the server, with the client optional, released under the MIT License and not open source. Message Lock is a Fabric and Quilt mod for 1.19 – 1.21.4 that runs on the player side alone, open source under the MIT License. Locked In needs both the server and every player, so it covers the same storage job differently.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Locked In | Fabric and Quilt | 1.21 – 1.21.1 | Client and server | 2026-05-02 |
| Lock and Key | Fabric, Forge, NeoForge and Quilt | 1.21 – 1.21.1 | Server required, client optional | 2024-08-26 |
| Message Lock | Fabric and Quilt | 1.19 – 1.21.4 | Client-side only | 2024-10-11 |
Questions
Does Locked In need Fabric API?
Does every player need Locked In on a server?
Which game versions does Locked In support?
In the catalog
Locked In is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from crystallized-dreams
Similar mods
Official listing
- Modrinth page
- modrinth.com/mod/lockedin
- Owner
- crystallized-dreams
- Published
- 2026-04-25
- Updated on Modrinth
- 2026-05-02
- Facts verified
- 2026-10-15