Sandboxes
One-click creative sandbox from any survival world. Copy, experiment, and return — your original world is never touched.
About this Mod
What is Sandboxes?
Sandboxes lets you copy your survival world into a creative duplicate for experimenting with builds, redstone, or layouts — then return to survival when you are done. Your original world is never touched.
Features
- One-click sandbox — create a creative copy of any survival world instantly
- Return to survival — switch back to your original world from the pause menu or keybind
- Multiple sandboxes — manage several sandboxes per world with create, sync, rename, and delete
- Auto-sync — re-copy your survival world into an existing sandbox to pick up new changes
- Sandbox mode indicator — red "SANDBOX MODE" label on the pause menu so you always know where you are
- World list cleanup — sandbox worlds are hidden from the main world selection screen
- Pause menu integration — sandbox button in the pause menu for quick access
- Inventory button — optional sandbox button in the inventory screen
Requirements
- Minecraft 1.21.11
- Fabric Loader 0.15.0+
- Fabric API
- MenuKit (required)
Note
Sandboxes is designed for singleplayer worlds. It copies the world at the file system level, so it only works with local saves.
Available Versions
How to Install Sandboxes 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 (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Sandboxes". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Sandboxes 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 (1.21.11). You can switch loaders with one click in the panel.
Is Sandboxes compatible with fabric?
Sandboxes officially supports fabric for Minecraft 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Sandboxes – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Sandboxes 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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