
Ultimate Key Lock
Allows to lock Doors and Containers with Trial Keys!
Screenshots


About this Mod
✨ Context
This mod simply allows to use Trial Keys and Ominous Trial Keys to lock blocks and entities.
By default on: Doors, Trapdoors, Fence Gates, Barrels and all Chests variants including Boats and Minecart.
🗝️ FEATURES
🔒 Locking
- Trial Keys on any lockable block will prevent interaction with it.
Chests will no longer open (protecting their inventory), neither will doors.
- Ominous Trial Keys will still allow the Owner (the Player who used it) to interact with the block, without needing the key.
This means they can even destroy the key and have exclusive access to a Chest or Trapdoor.
- With either Key, the block becomes unminable by both players and mobs.
Villagers and Zombies cannot break locked doors. This truly protects your build and adds lore!
- Keys will be given a unique ID upon first use, similar to vanilla maps.
The Id only exists for tracking and helping players sort their keys.
- Keys will also be automatically renamed based on their bound block, most languages are supported!
Even better: you can still rename the keys at any moment and your custom name will have priority over the automatic rename.
🔓 Unlocking
- Using the same key on the bound block will unlock it.
- The key will lose its autoname but will retain its ID and custom name.
⚡ Redstone
- Dispensers can use Keys to lock blocks.
Use your imagination to create automated locking systems or more :)
- Locked blocks and entities will NOT react to Redstone!
That means buttons will not be able to open doors, hoppers will not pass items down to a locked chest etc.
- Copper Golems will ignore locked chests.
Again, allows complex automation using dispensers and hoppers.
💥 Removal
- Locked Blocks are unbreakable / unmineable. This means the only way to remove them is:
1) Unlocking with the unique key
2) An explosion (TNT, Creeper...)
3) Creative mode
This choice was made so locked blocks are not overpowered, while still offering advantages at low risk.
🔏 Lockable
The following blocks and entities are lockable:
- Doors
- Trapdoors
- Fence Gates
- Chests
- Copper Chests variants
- Barrels
- Minecart with Chest
- Boats with Chest
- Cabinets (Farmers Delight)
Note: Double Doors and Trapdoors will be locked together!
🌐 Supported Languages
The autoname mechanic is supported in the following languages:
- 繁體中文 (Traditional Chinese)
- 简体中文 (Simplified Chinese)
- Dansk (Danish)
- Nederlands (Dutch)
- English
- Eesti (Estonian)
- Français (All French dialects)
- Deutsch (German)
- Italiano (Italian)
- Íslenska (Icelandic)
- 日本語 (Japanese)
- 한국어 (Korean)
- Norsk (All Norwegian dialects)
- Português (Portuguese & Brazilian Portuguese)
- Русский (Russian)
- Español (All Spanish dialects)
- Svenska (Swedish)
- ไทย (Thai)
- Tiếng Việt (Vietnamese)
- Українська (Ukrainian)
⚙️ No configuration required, ready to use!
🔗 Compatibility
- Compatible with most Double Doors/Trapdoors mods.
- Compatible with Biomes o Plenty and Farmers Delight!
- Also compatible with most mods that add variants of doors, trapdoors or containers that register under chests!
Available Versions
How to Install Ultimate Key Lock on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1.2).
Install Mod
Open the mod browser in the dashboard and search for "Ultimate Key Lock". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2, 26.1.1, 26.1
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Ultimate Key Lock server crashes on startup – what to do?
Most common cause: wrong fabric 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 (26.1.2). You can switch loaders with one click in the panel.
Is Ultimate Key Lock compatible with fabric?
Ultimate Key Lock officially supports fabric for Minecraft 26.1.2, 26.1.1, 26.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Ultimate Key Lock – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Ultimate Key Lock 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.
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Install Ultimate Key Lock with just one click on your server.