MapSync
by Gjum
MapSync shares the chunk maps that players explore with friends, so each map gets filled in from what others have already mapped.
What it does
Map-Sync records which chunks each player has loaded and tracks a timestamp for every chunk, so older data never overwrites newer data. Mapped chunks are sent to a Sync Server, and friends connected to it receive the chunks mapped since they last played. A friend's client needs MapSync installed to contribute, even when that friend does not use a map mod. Only the client needs the mod, so servers run without it.
Compatible map mods such as Journeymap, Voxelmap and Xaero's map display the synced data. The mod is licensed under the GNU General Public License v3.0 only and is open source. It is published for Fabric and 1.21.11 only.
Key features
Real-time map synchronization
Map data is synchronized in real time, so newly mapped areas reach connected players quickly.
Shared exploration
Players see exactly the terrain their friends have explored, including chunks they have not visited themselves.
Timestamped chunk data
Each chunk carries a timestamp, so newer map data always replaces older data from other players.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
In the catalog
MapSync is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 19,862 mods support Minecraft 1.21.11.
More from Gjum
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What the author says
When you connect, you receive all chunks that your friends have mapped since the last time you played (and were connected to the Sync Server). Every time any of your friends load a chunk with Map-Sync installed (even if they don't use any map mods!), it gets mapped and the map data gets sent to the Sync Server. It…
Official listing
- Modrinth page
- modrinth.com/mod/mapsync
- Owner
- Gjum
- Published
- 2026-03-07
- Updated on Modrinth
- 2026-03-07
- Facts verified
- 2026-10-15