mapsyncer-rebuild
by ShanHe_YF
Players joining a long-running server find its explored terrain already mapped when MapSyncer Rebuild sends cached map regions to Xaero's World Map.
What it does
Normally Xaero's World Map keeps map data only on the player's own client, so a newcomer to an old world sees an almost empty map and must explore the terrain again. MapSyncer Rebuild lets the server send regions that have already been generated and cached, so the client receives the existing map on joining. It is aimed at survival and private servers, large worlds, and exploration or building servers where players should reach map data that others have already revealed.
The sync is dual-sided, using dirty-region incremental updates and background migration to limit how much data moves over the network. Optional Voxy support can sync both server and client, while the normal Xaero map sync works without it. The mod is published for Fabric only, for game version 26.1.2. The server needs Fabric Loader, Fabric API and MapSyncer Rebuild, and it does not need Xaero's World Map; the client needs Xaero's World Map to display the synchronized data. The server is required, while the client may leave the mod out.
Key features
Server-sent map regions
The server sends regions it has already generated and cached, so a joining player receives explored terrain without retracing it.
Incremental updates
Dirty-region incremental updates send only changed areas, and background migration handles stored map data.
Optional Voxy sync
With Voxy installed, map data can be synchronized on both server and client, and the sync works without it.
Map access on join
After joining a server with the mod installed, the player opens the map GUI to view the shared regions.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
MapSyncer-for-XaeroWorldmap is open source under the GNU Lesser General Public License v3.0 only and runs on Fabric, Forge and NeoForge for 1.20 – 26.1.2, with the client or server optional. Xaero Map Addition is client-side only, open source under the Mozilla Public License 2.0 and built for Fabric 1.14.4 – 1.19. VoxySync is open source under the GNU General Public License v3.0 only, for Fabric 1.20.1, and needs both client and server.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| mapsyncer-rebuild | Fabric | 26.1.2 | Server required, client optional | 2026-06-15 |
| MapSyncer-for-XaeroWorldmap | Fabric, Forge and NeoForge | 1.20 – 26.1.2 | Client or server, optional | 2026-06-16 |
| Xaero Map Addition | Fabric | 1.14.4 – 1.19 | Client-side only | 2022-06-11 |
| VoxySync | Fabric | 1.20.1 | Client and server | 2026-09-05 |
Questions
Does the server need Xaero's World Map?
Does the mod require Voxy?
Which game versions does MapSyncer Rebuild support?
In the catalog
mapsyncer-rebuild is one of 8,016 Management mods on ModsFinder, and one of 5,930 Management mods for Fabric. 15,189 mods support Minecraft 26.1.2.
Similar mods
What the author says
Introduction MapSyncer Rebuild is a map synchronization mod for Xaero's World Map. Normally, Xaero's World Map stores map data locally on each player's client. This means that when a new player joins a server that has already been explored for a long time, their map is usually empty, and they need to explore the…
Official listing
- Modrinth page
- modrinth.com/mod/mapsyncer-rebuild
- Owner
- ShanHe_YF
- Published
- 2026-06-03
- Updated on Modrinth
- 2026-06-15
- Facts verified
- 2026-10-15