Freeze Observers
by flooflez
Freeze Observers is a Fabric game rule mod that temporarily stops observers from emitting redstone signals, so unfinished builds do not set off pistons, droppers or other circuits.
What it does
The mod is a Fabric mod that adds a new game rule. When the rule is switched on, observers stop sending their redstone pulse, so a builder can place and wire observer-based components without setting off pistons, droppers or other redstone along the way. Turning the rule off restores normal observer behavior, and players can flip it at any time with the game rule command.
Freeze Observers is server-side only. Only the server host needs the mod installed, and players join and build without installing anything. The mod is published for Fabric on 1.20.1 and 1.20.2, with the 1.20.2-1.0.0 file as the latest build. Fabric API must be installed on the server next to it, because Fabric loads it as a separate jar. The code is open source under the MIT License.
The mod is compatible with schematic tools such as Litematica, so schematics with observers can be pasted into a world without triggering the circuits they contain. Installing it takes a Fabric profile, a placed Fabric API jar, and a launch of the newly created profile.
Key features
Game rule for observers
A game rule stops every observer from emitting redstone signals until the rule is switched back off.
Safe building with observers
Builders can place observer contraptions without accidentally triggering pistons, droppers or other redstone.
Works with schematic tools
Schematics from Litematica can be pasted and copied without firing their observers.
Server-only setup
Players connect without the mod, since only the server runs it and the game rule is set on the host.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Who it’s for: Server owners and survival or creative players who build observer-based redstone and want a way to pause observers while they work.
How it compares
Smart Observer is a Fabric mod for 1.21.1 – 1.21.8 with a client and server environment, and it is open source under the MIT License. Coal Chunk Loader is server-side only, open source under the Apache License 2.0 and published for 1.21 – 26.2. Freeze Observers is also server-side only and open source, but it targets only 1.20.1 and 1.20.2 and is released under the MIT License.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Freeze Observers | Fabric | 1.20.1 – 1.20.2 | Server-side only | 2023-09-28 |
| Smart Observer | Fabric | 1.21.1 – 1.21.8 | Client and server | 2025-08-27 |
| Coal Chunk Loader | Fabric | 1.21 – 26.2 | Server-side only | 2026-07-15 |
Questions
Does Freeze Observers need to be installed on the client?
Which Minecraft versions does Freeze Observers support?
Does Freeze Observers need Fabric API?
In the catalog
Freeze Observers is one of 8,499 Technology mods on ModsFinder, and one of 4,201 Technology mods for Fabric. 12,076 mods support Minecraft 1.20.2.
More from flooflez
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What the author says
This simple fabric mod for Minecraft that implements a new gamerule that toggles the functionality of observers by preventing them from sending a redstone signal. This is super helpful when building with observers to stop them from accidentally triggering pistons, droppers, and other redstone components before…
Official listing
- Modrinth page
- modrinth.com/mod/freeze-observers
- Owner
- flooflez
- Published
- 2023-07-27
- Updated on Modrinth
- 2023-09-28
- Facts verified
- 2026-10-15