
BlockReplacer
Mass replace blocks with simple creative commands whole world or a selected area, with a wand, live progress, counting and undo/redo.
Screenshots



About this Mod
BlockReplacer
Replace blocks in bulk with simple creative commands. Everything works in creative mode and is fully undoable.
Commands
Use /blockreplacer, /br or /blockrep:
/br world
— replace a block type in all loaded chunks /br world all
— replace every (non-air) block /br area
— replace inside your wand selection /br area
— replace inside a coordinate box /br area all
[c1 c2] — replace every block in the selection/box /br count
| /br count all — count blocks (no changes) /br undo | /br redo — up to 5 steps each
/br stop — stop a running operation (partial result stays, can be undone)
/br wand — get the selection axe (left-click = corner 1, right-click = corner 2)
/br messages on|off — toggle info messages
Features
- Keeps position and orientation 1:1 — only the block type changes
- Attached blocks like torches are not knocked off
- Live progress in chat for large operations
Requirements
- Fabric Loader
- Fabric API
Available Versions
How to Install BlockReplacer 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 "BlockReplacer". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1.2
Server-side
~ OptionalRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
BlockReplacer 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 BlockReplacer compatible with fabric?
BlockReplacer officially supports fabric for Minecraft 26.1.2. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with BlockReplacer – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if BlockReplacer 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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