MirrorMod
by K1lSofix
MirrorMod is a Fabric utility that copies block placements, breaks and interactions across a mirror plane in real time, for players building symmetrical structures.
What it does
Each block placed, broken or interacted with on one side of the mirror is repeated on the opposite side as it happens, so symmetrical tunnels, halls and facades can be built without copying and pasting. A player who wants a mirrored result keeps working normally, while the mod handles the repeated actions in the background. Changes are sent to the other chunks as they are made, so the mirrored area fills in immediately.
The mod is aimed at developers who need to scale builds quickly, including creative servers where large constructions are made in bulk. Its author describes it as still in beta testing and asks for bug reports. MirrorMod runs on client and server, so the server and every player need it. It is published for Fabric only, across seven release versions 1.20.1 – 26.2, under the MIT License, and it is not open source. Fabric API must be installed alongside it.
Key features
Real-time mirroring
Block placements, breaks and interactions are mirrored across the plane as they happen, with no manual copying.
Cross-chunk updates
Mirrored changes reach blocks in other chunks, so the copy appears even when it lies outside the loaded area.
Symmetrical building
Tunnels, symmetrical structures and complex architecture can be produced with one placement per pair of blocks.
Beta status
The mod is in beta testing, and its author asks players to report bugs.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Creative servers
Large builds on creative servers can be produced quickly, with each action copied to the mirrored side.
Symmetrical architecture
Tunnels, halls and facades that repeat on both sides of a line are built without repeating each step.
Who it’s for: Builders and developers who scale constructions on Fabric, and server owners who run creative builds with both client and server installed.
How it compares
Smart Block Placement is client-side only, targets 1.20.6 – 26.3 on Fabric and is open source under the MIT License. World Mirror is also client-side only, open source under the MIT License, and covers 1.21.11 – 26.3 on Fabric. Effortless Building runs on client and server, is open source under the GNU Lesser General Public License v3.0 only, and is available for Fabric, Forge and NeoForge.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| MirrorMod | Fabric | 1.20.1 – 26.2 | Client and server | 2026-09-18 |
| Smart Block Placement | Fabric | 1.20.6 – 26.3 | Client-side only | 2026-09-15 |
| World Mirror | Fabric | 1.21.11 – 26.3 | Client-side only | 2026-10-04 |
| Effortless Building | Fabric, Forge and NeoForge | 1.19.2 – 26.3 | Client and server | 2026-10-10 |
Questions
Does MirrorMod need Fabric API?
Does the server need MirrorMod?
In the catalog
MirrorMod is one of 29,952 Game mechanics mods on ModsFinder, and one of 19,630 Game mechanics mods for Fabric. 13,894 mods support Minecraft 26.2.
Similar mods
What the author says
Mirror Mod is a powerful utility mod designed for developers who want to scale their builds instantly. Whether you're building massive tunnels, symmetrical structures, or complex architectures, this mod automatically displays your actions in all uploaded fragments in real time. No more manual copying, pasting or…
Official listing
- Modrinth page
- modrinth.com/mod/mirrormod
- Owner
- K1lSofix
- Published
- 2026-08-01
- Updated on Modrinth
- 2026-09-18
- Facts verified
- 2026-10-15