Command Blocker
by naomi
Command Blocker lets server owners turn off command blocks through a single server.properties setting, with no effect on vanilla gameplay.
What it does
A gamerule can disable command blocks quickly, and the enable-command-block setting in server.properties controls the same behavior on multiplayer servers. Changes made to server.properties take effect only when the server starts, so a running server keeps its current setting until restart. The mod is server-side only, so players join without installing anything. Fabric and NeoForge builds are published for 1.20.1 – 1.21.5, and the code is licensed under the GNU Lesser General Public License v3.0 only. Fabric API, Fabric Language Kotlin and Kotlin for Forge are required, depending on the loader.
Key features
Gamerule shutoff
A gamerule disables command blocks quickly, without editing any file during play.
Server property control
The enable-command-block setting in server.properties decides whether command blocks run on a multiplayer server.
Restart-based changes
Edits to server.properties apply only when the server starts, so a running server cannot change the setting until restart.
Compatibility
Latest build for each game version and loader.
1.21.x6 of 6 versions with builds
1.20.x6 of 6 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
How it compares
DisableCommand is NeoForge only, for 1.21.1 – 1.21.11, and is all rights reserved, not open source. I Command It! is a Fabric mod for 1.20.3 – 1.21.1 under All rights reserved. Disable F5 works on Forge and NeoForge for 1.20.1 – 1.21.1 and runs on both client and server.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Command Blocker | Fabric and NeoForge | 1.20.1 – 1.21.5 | Server-side only | 2025-06-07 |
| DisableCommand | NeoForge | 1.21.1 – 1.21.11 | Server-side only | 2026-07-18 |
| I Command It! | Fabric | 1.20.3 – 1.21.1 | Server-side only | 2025-09-25 |
| Disable F5 | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-04-03 |
Questions
Does Command Blocker need to be installed on the client?
In the catalog
Command Blocker is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 15,307 mods support Minecraft 1.21.5.
More from naomi
Similar mods
What the author says
In multiplayer, in the server.properties, there is a setting called enable-command-block - so you would think this mod is useless. It is not. Modifications to your server.properties are only applied on server start, so you cannot change this setting while the server is running. HOWEVER, this can be a security problem…
Official listing
- Modrinth page
- modrinth.com/mod/blocker
- Owner
- naomi
- Published
- 2024-03-08
- Updated on Modrinth
- 2025-06-07
- Facts verified
- 2026-10-15