Enable OneSync on a FiveM Server

OneSync allows you to increase the number of players connected simultaneously on a FiveM server and improves entity synchronization (NPCs, vehicles, etc.).
There are two main ways to enable it: via txAdmin or directly in the server.cfg file.

1. Enable OneSync via txAdmin

1. Open txAdmin in your browser (usually: http://localhost:40120).
2. Go to the Settings tab.
3. In the FXServer Settings section, look for the OneSync option.
4. Enable OneSync (Legacy, Infinity, or Plus) depending on your FiveM plan:
   • Legacy: free version, limited to 48 slots.
   • Infinity: premium version, better synchronization and more players.
   • Plus: reserved for FiveM Patreon Tier 3+ servers.
5. Click Save & Restart Server to apply the changes.

2. Enable OneSync via the server.cfg file

If you prefer to modify the configuration file directly:

1. Open your server.cfg file.
2. Add or edit the following line depending on your OneSync type:
   For OneSync Legacy (free):

   set onesync legacy
   

   
   For OneSync Infinity:

   set onesync on
   

   
   For OneSync Plus (Patreon):

   set onesync_enableInfinity 1
   set onesync_forceMigration 1
   

3. Save the file, then restart your server.

3. Verify that OneSync is active

Once your server is running, you can check if OneSync is enabled:

• Look in the server console: you should see a line saying
  OneSync enabled.
• Connect and type the following command in the console:

  onesync_status
  

  It should return OneSync status: enabled.

4. Common Issues

5. Additional Tips

• Do not mix multiple OneSync options in the same file.
• Always restart the server after modifying server.cfg.
• Some older mods may not be compatible with OneSync Infinity — check their documentation.