NeoSync

NeoSync

Inspired by the original Sync mod, NeoSync lets you clone yourself into shells each with its own inventory, XP, and gamemode and swap minds between them across time and space.

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Screenshots

Rebuilding a better future you!
One mind, Many Bodies

About this Mod

NeoSync

NeoSync

One mind. Many bodies.

NeoSync brings the legendary Sync experience to NeoForge 1.21.1.

Grow extra bodies, or shells, each with its own inventory, experience level, and gamemode. Swap your consciousness between them at will. Die in a shell? You wake up in another.
Leave one parked in the Nether while you mine the Overworld. Keep a spare set of enchanted gear loaded in a shell halfway across the server. The possibilities are yours.


How it works

  1. Craft a Shell Constructor and place it down.
  2. Provide a genetic sample — right-click with an empty hand.

    ⚠️ With default config this costs 20 HP (40 in hardcore). Hold a totem, eat a golden apple, or flip warnPlayerInsteadOfKilling in the config if you'd rather not die
    for science.

  3. Power the Constructor. Place a Treadmill next to it, lure a pig or wolf onto the front block, and piggawatts flow. Or hook it up to any Forge Energy source from your
    favourite tech mod.
  4. Craft a Shell Storage, place it, and feed it redstone or FE.
  5. Walk into an open Shell Storage and a radial shell menu appears — pick your destination body and sync.

Shell Constructor in action

Radial shell selector


Features

  • Cross-dimensional syncing. Park shells in the Overworld, Nether, End, or any modded dimension and sync between them instantly.
  • Per-shell inventory, XP, and gamemode. Each shell is a fully independent body with its own loadout and progression.
  • Death handoff. If a shell dies, you auto-sync back to your original body or to a random remaining shell if the original is gone. Shell deaths don't count toward your
    death counter.
  • Automation support. Pipe armor and tools into a Shell Storage to equip the parked shell, or pull gear back out.
  • Dye your storages. Right-click a Shell Storage with dye to color-code it makes spotting "the mining shell" across a dozen containers easier.
  • Configurable sync priority. On death, auto-sync to the NATURAL, NEAREST, or dye-color-matched shell of your choice.
  • Flexible power. Shell Storages accept raw redstone signal and/or FE. Treadmills output FE to any energy-accepting block.
  • Comparator output. Containers emit signal based on either build progress or inventory fullness — right-click with a wrench (stick by default) to toggle.

Blocks & Items

Block / Item Purpose
Shell Constructor Consumes FE to grow a new shell from your genetic sample.
Shell Storage Houses a shell; walking in opens the radial selector. Needs power to keep the shell alive.
Treadmill Two-block structure. Lure an animal on; it walks; FE flows.
Sync Core Key crafting ingredient — combine with gray concrete to make either shell container.

Mod Integration

  • JEI — in-depth info panels on every sync block explaining the workflow, plus a Treadmill Energy Sources category
    listing every supported entity and its FE/tick output.
  • Jade — crosshair tooltips for Shell Constructors, Storages, and Treadmills showing owner, build progress, color,
    powered state, and energy.

Both are optional. NeoSync runs fine without them.


Configuration

Everything is tunable in config/neosync-common.toml. A taste of the knobs:

Key Default Effect
enableInstantShellConstruction false Instant shell builds in creative.
warnPlayerInsteadOfKilling false Don't kill low-HP players on fingerstick.
fingerstickDamage / hardcoreFingerstickDamage 20 / 40 HP consumed per shell sample.
shellConstructorCapacity 256000 FE needed to finish a shell.
shellStorageCapacity / shellStorageConsumption 320 / 16 FE buffer + per-tick drain to keep a shell alive.
shellStorageAcceptsRedstone true Accept raw redstone signal as power.
shellStorageMaxUnpoweredLifespan 20 Ticks a storage holds a shell without power.
energyMap chicken=2, pig=16, player=20, wolf=22, villager=25, creeper=80, enderman=160 FE/tick each entity generates on a treadmill.
syncPriority NATURAL On-death auto-sync target: NATURAL, NEAREST, or any dye color.
wrench minecraft:stick Item that toggles a container's comparator output.

Credits & License

  • Original concept: iChun — the original Sync mod.
  • Fabric reimplementation: Kir_Antipov.
  • NeoForge 1.21.1 port: BreakinBlocks.

Licensed under MIT. See the LICENSE file for details.

Available Versions

NeoSync 1.21.1-1.2.1release
MC 1.21.1neoforge
June 11, 2026
NeoSync 1.21.1-1.2.0release
MC 1.21.1neoforge
May 28, 2026
NeoSync 1.21.1-1.1.0release
MC 1.21.1neoforge
May 22, 2026
NeoSync 1.0.0release
MC 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11neoforge
April 22, 2026

How to Install NeoSync on Your Server

1

Order Server

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

2

Set neoforge Loader

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

3

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+8 more)

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

NeoSync server crashes on startup – what to do?

Most common cause: wrong neoforge 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 NeoSync compatible with neoforge?

NeoSync officially supports neoforge for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with NeoSync – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if NeoSync 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.

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Details

License
MIT License
Server-side
Required

Supported Versions

1.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.2+1 more