Chest SignLock

Chest SignLock is an open-source, server-side Fabric mod for Minecraft 26.2 that allows players to protect containers, doors, beacons, and other blocks using signs.

The system uses the familiar [Private] and [More Users] format inspired by BlockLocker. No client-side installation is required: only the server needs the mod and Fabric API.

Features

• Protect blocks using [Private] signs
• Add authorized players using [More Users] signs
• Store player UUIDs while keeping usernames visible
• Automatically link UUIDs when a listed player interacts
• Prevent outdated hidden UUIDs from granting access
• Treat double chests and both halves of a door as one protected object
• Allow server operators to bypass player-facing protections
• Protect locked blocks and signs from explosions and pistons
• Block hoppers, hopper minecarts, and copper golems by default
• Allow automation with [Redstone]
• Built-in English and French messages
• Fully configurable messages through YAML files
• Server-side only

Supported Blocks

• Chests
• Trapped chests
• Barrels
• Shulker boxes
• Dispensers
• Droppers
• Furnaces
• Blast furnaces
• Smokers
• Lecterns
• Beacons
• All doors

Creating a Protection

Right-click a supported block with a regular sign while not sneaking.

The first sign is created automatically:

[Private]
PlayerName

Additional signs use:

[More Users]
PlayerName

The main [Private] sign belongs to the first listed player. Only that owner or a server operator can break it.

Signs placed while sneaking remain normal decorative signs. They do not grant access and are not protected by the mod.

The automatic placement system keeps the wood type of the sign being used.

Redstone and Automation

Private inventories cannot be accessed by:

• Hoppers
• Hopper minecarts
• Copper golems

Private doors and protected blocks are also secured against piston movement.

To explicitly allow redstone or inventory automation, add the following line to an attached protection sign:

[Redstone]

Commands

All commands require operator permissions.

/chestlocklang en
/chestlocklang fr
/chestlockdebug

Language changes are applied immediately without restarting the server.

Configuration

Configuration files are generated in:

config/ChestLockSign/messages.yml
config/ChestLockSign/messages/en.yml
config/ChestLockSign/messages/fr.yml

The default language is English.

Every chat message can be customized in the YAML files. Normal messages use the orange [Chest SignLock] prefix, while debug messages use [Debug Signlock].

Requirements

• Minecraft 26.2
• Fabric Loader 0.19.3 or newer
• Fabric API
• Java 25
• Server-side installation only

Support

Need help, found a bug, or want to suggest a feature?

Join the support Discord:

https://discord.gg/9uWSkXJUfc

Chest SignLock will be updated and maintained as often as possible.

Open Source

Chest SignLock is open source and licensed under the MIT License. Contributions, feedback, and bug reports are welcome.

Supporting a Good Cause

Every dollar generated by Chest SignLock will be donated to [RIGOLOPITO Les clowns hospitaliers], helping bring joy and support to children through clown performances.

Thank you for supporting both the mod and this cause.

Credits

Chest SignLock is inspired by BlockLocker, the classic Minecraft sign-based protection plugin by Rutger Kok and contributors.

This project is an independent Fabric implementation and is not affiliated with or endorsed by BlockLocker.