Chunk Randomizer
Replaces all blocks of every chunk you visit! Explore the randomizing world ... ... and defeat the ender dragon!
Screenshots
About this Mod
Random Chunks
Every chunk you visit is randomized to a new blocktype!
Explore the world..
.. defeat the ender dragon.
Important: Run /rc start in chat to start the challenge. Chunk randomization only begins after this command.
🛠 Basic Commands
| Command | Description |
|---|---|
/rc start |
Activate the challenge. |
/rc stop |
Pause the challenge. |
/rc effects |
Toggle potion effects (Default: false) |
/rc fluids <true/false> |
Toggle: Should Water, Lava and Fire be randomized? (Default: false) |
/rc exclude add <block> |
Add a block to the custom blacklist |
/rc exclude clear |
Reset your custom blacklist |
/rc debug <0-3> |
Toggle debug messages for protection, blocks, and effects. |
💡 Pro Tips & Customization
- Use /rc exclude add minecraft:... to prevent a chunk from turning into a lag-fest.
- Chunk Walker Boots: They protect you from all world-randomization and effects, but they lose 10 durability per chunk.
- Status effects/curses are disabled by default. Enable or disable them using
/rc effects. Active chunk effects are removed immediately when you leave the chunk, use Chunk Walker Boots, stop the challenge, or disable effects.
Developed by Eckelsoft
Available Versions
How to Install Chunk Randomizer on Your Server
Order Server
Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Chunk Randomizer". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.21.9 (+1 more)
Server-side
✓ RequiredRecommended RAM
6 GB(min. 4 GB)Frequently Asked Questions
Chunk Randomizer 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 4 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Chunk Randomizer compatible with fabric?
Chunk Randomizer officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Chunk Randomizer – how to optimize performance?
Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Chunk Randomizer 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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