Always Multiplayer
Lightweight mod that automatically publishes singleplayer worlds for online play. Allows your friends to join without always having to remember to enable multiplayer first.
Screenshots
About this Mod
Key Features
- Publish singleplayer worlds automatically when loading the world.
- Restrict access to friends only.
- Use native server commands like /whitelist and /ban.
- Set default gamemode and commands for other players.
Config
Global settings can be added in config/alwaysmultiplayer.json. These settings can also be found under the Minecraft main menu Options... -> Online... -> Always Multiplayer Config...
| Setting | Default | Description |
|---|---|---|
multiplayer |
LAN |
Set to LAN to open all singleplayer worlds to LAN by default (or to the internet with port forwarding or other mods). Turn OFF to stay in singleplayer by default. |
access |
FRIENDS |
Who can join your multiplayer worlds. FRIENDS: allow Minecraft friends (and whitelisted players). WHITELIST: only allow whitelisted players. OPEN: allow all connections. |
gamemode |
null (Auto) |
The default game mode for other players that join your worlds. Set null to follow the world setting, or set to SURVIVAL, CREATIVE, ADVENTURE, or SPECTATOR to assign a global default. |
commands |
null (Auto) |
The default commands for other players that join your worlds. Set null to follow the world setting, or set to true or false to assign a global default. |
port |
null (Auto) |
The default port number for LAN worlds only. Set null to auto assign a free port each time, or enter a number between 1024 and 65535. |
Commands
All the built in server commands are made available, including /ban /whitelist and /op. These commands create json files at the root of your profile folder (not specific to any world). I.e. the same location as your usercache.json. See example whitelist.json.
| Command | Description | Example | Operator Level |
|---|---|---|---|
| /whitelist | White-list a player to allow them to join when the Access setting is FRIENDS or WHITELIST. | /whitelist add Player123 |
3 (Admin) |
| /ban | Ban a player from joining any of your worlds. Also includes /ban-ip and /banlist. | /ban Player123 |
3 (Admin) |
| /pardon | Unbans a player so they can join all of your worlds. | /pardon Player123 |
3 (Admin) |
| /op | Makes a player a level 2 Operator (the same permissions that enabling 'Commands' gives by default). | /op Player123 |
3 (Admin) |
| /deop | Removes a players Operator permissions (unless 'Commands' are enabled for other players by default). | /deop Player123 |
3 (Admin) |
| /perf | Starts the performance profiler. | /perf start |
4 (Owner) |
| /save-all | Saves the world. Also includes /save-off and /save-on. | /save-all |
4 (Owner) |
| /stop | Stops the server and disconnects all players (alternatively use /unpublish). | /stop |
4 (Owner) |
Opening LAN worlds to the internet
P2P has been removed from the 26.2 update (for now), and with it the 'Online' multiplayer option for singleplayer worlds. While this does make it harder to connect with friends, it's still possible using the 'LAN' multiplayer option and some additional setup.
- Create a port forwarding rule on your home router to forward a specific port to your computer, and get your friends to join using your public IP address + the port number, e.g.
10.1.1.1:5555. - Or, use mods like e4mc which assigns a unique public domain each time you open your world to LAN.
Make sure to use whitelist or access restrictions if you want to prevent unexpected connections.
Available Versions
How to Install Always Multiplayer 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 (26.2).
Install Mod
Open the mod browser in the dashboard and search for "Always Multiplayer". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.2, 26.2-rc-2, 26.2-rc-1 (+8 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Always Multiplayer 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 (26.2). You can switch loaders with one click in the panel.
Is Always Multiplayer compatible with fabric and neoforge?
Always Multiplayer officially supports fabric, neoforge for Minecraft 26.2, 26.2-rc-2, 26.2-rc-1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Always Multiplayer – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Always Multiplayer 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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