Random Hotbar Select

Adds the ability to automatically select a random hostbarslot to create random block patterns. You can press the Keybind (default "k") to toggle this feature. If enabled it selects a random slot (0 - 9) on every item use (right click).

2.1K Downloads

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About this Mod

Simplify your building experience in Minecraft with RandomBuildBlocks! This mod adds a touch of randomness to your structures, making building more creative and enjoyable by introducing a random block pattern with just a click of button.

Adds the ability to automatically select a random hostbarslot to create random block patterns. You can press the Keybind (default "k") to toggle this feature.

If enabled it selects a random slot (0 - 9) on every item use (right click).

Available Versions

Random Hotbar Select 1.2release

MC 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5fabric

September 29, 2025

Random Hotbar Select 1.1release

MC 1.20.3, 1.20.4, 1.20.5, 1.20.6fabric

February 15, 2024

Random Hotbar Select 1.0release

MC 1.20, 1.20.1, 1.20.2fabric

December 8, 2023

Random Hotbar Select 1.0release

MC 1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4fabric

December 8, 2023

Random Hotbar Select 1.0release

MC 1.18, 1.18.1, 1.18.2fabric

December 8, 2023

How to Install Random Hotbar Select 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 (1.21.5).

Install Mod

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

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.5, 1.21.4, 1.21.3 (+18 more)

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Random Hotbar Select 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 (1.21.5). You can switch loaders with one click in the panel.

Is Random Hotbar Select compatible with fabric?

Random Hotbar Select officially supports fabric for Minecraft 1.21.5, 1.21.4, 1.21.3. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Random Hotbar Select – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Random Hotbar Select 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.