Locksmith

Locksmith

Craft keys and lock any block!

by
3.3K Downloads
neoforgeadventure
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Screenshots

DoubleDoorsLock

About this Mod

Locksmith title banner

Allows the locking of blocks using physical keys instead of permissions.

By default, vanilla doors, chests, and trapped chests are supported. Additional blocks — including modded ones — can be configured server-side.

Features banner

🔑 Craft iron keys and register them with a secret passphrase

🔒 Lock doors, chests, and other blocks using those keys

📋 Duplicate keys safely (master & copied key system)

🚪 Optional auto-opening/closing for locked doors (incl. double-doors)

🧩 Supports modded blocks via simple configuration

🌐 Fully server-authoritative & multiplayer-safe

🛠️ Curios compatibility (Key slot)

How-to banner

1️⃣ Craft an iron key (1x iron ingot, 2x iron nugget below)

2️⃣ Right-click while holding the key to register it.

3️⃣ Enter a secret passphrase when prompted.

4️⃣ Right-click a door or chest with the registered key to lock it.

5️⃣ Duplicate keys using the minting recipe if multiple players need access. Players without a matching key will be unable to open the locked block.

Customize banner

Server administrators can define exactly which blocks are lockable. This includes vanilla blocks as well as blocks added by other mods.

Example: adding a custom door:

{
  "id": "my_mod_doors",
  "type": "door",
  "blocks": [
    "modid:steel_door",
    "modid:reinforced_door"
  ],
  "render": {
    "offsetX": -0.05,
    "offsetY": 0.5,
    "offsetZ": -0.5,
    "rotX": 0.0,
    "rotY": 0.0,
    "rotZ": 0.0,
    "scale": 0.75,
    "hingeNudgeLeft": 0.18,
    "hingeNudgeRight": 0.325
  }
}

These profiles control locking behavior only. They do not affect block hardness or explosion resistance.

💡 Tips

This mod does not make locked blocks invulnerable. I'd strongly recommend combining this mod with something like OpenPAC (this mod was built exactly for that scenario).

📝 Licensing and distribution

Locksmith is released under the Z2SIX Mod License.

Available Versions

Locksmith 1.2.2release
MC 1.21.1neoforge
January 28, 2026
Locksmith 1.2.1release
MC 1.21.1neoforge
January 4, 2026
Locksmith 1.0.0release
MC 1.21.1neoforge
January 3, 2026

How to Install Locksmith on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.1).

3

Install Mod

Open the mod browser in the dashboard and search for "Locksmith". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Locksmith server crashes on startup – what to do?

Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Locksmith compatible with neoforge?

Locksmith officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Locksmith – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Locksmith consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install Locksmith with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
LicenseRef-Z2SIX-Mod-License
Server-side
Required

Supported Versions

1.21.1