MapSync

Real-time map data synchronization: See exactly what your friends see, as they explore it.

by GjumUtility

Fabric

Loaders: Fabric
Downloads on Modrinth: 360
Followers on Modrinth: 5
version: 1
Updated: March 7, 2026Mar 7
Published: in 2026

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At a glance

Runs on Fabric

For Minecraft 1.21.11

Client only — no need to install it on the server

Latest version — 2.1.0-1.21.11 from March 7, 2026

License GPL-3.0-only — free

Where it's needed

In gamerequiredOn servernot needed

Install in the game only; not needed on the server

Game versions1.21.11

Usage

Join a Minecraft server, open the GUI via the keybind (comma , by default) or through Mod Menu, enter the address of your Sync Server, and click "Connect".

How it works

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 will then send it to everyone else, and if you have a compatible map mod installed (Journeymap, Voxelmap or Xaero's), the mod will display your friends' chunks.

Map-Sync tracks a timestamp per chunk, so old data will never overwrite newer data.

FAQ

How to install MapSync?

Install Fabric for your Minecraft version, download MapSync for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does MapSync support?

MapSync has builds for Minecraft 1.21.11.

Is MapSync needed on the server?

Client only — no need to install it on the server

License and source

GNU General Public License v3.0 onlyfree to use and share; changes to the mod itself must be published under the same license

Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders