MapSync

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

211 Downloads

fabricutility

About this Mod

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.

Available Versions

MapSync 2.1.0-1.21.11release

MC 1.21.11fabric

March 7, 2026

How to Install MapSync on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set fabric Loader

In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).

Install Mod

Open the mod browser in the dashboard and search for "MapSync". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

fabric

Minecraft Versions

1.21.11

Server-side

✗ Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

MapSync server crashes on startup – what to do?

Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is MapSync compatible with fabric?

MapSync officially supports fabric for Minecraft 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with MapSync – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if MapSync consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.