Installing Mods on Your Arma Reforger Server

No In-App Workshop Browser

Arma Reforger doesn't have a built-in mod browser like Arma 3 or DayZ. Instead, mods are referenced directly inside the server's own server.json configuration file, using Arma Reforger's documented server-config schema — the same mechanism you'd use on any Reforger dedicated server, not something Spawnly-specific.

Adding a Mod

1. Open the Files tab (File Manager) and open server.json in the server root.
2. Find the game object, and inside it the mods array. Add an entry for each mod you want loaded — at minimum a modId, which is the Workshop ID shown on the mod's page in-game or on the Reforger Workshop site.
3. Save the file.
4. Restart the server for the change to take effect.

A mods array with two mods looks like this:

{
  "game": {
    "name": "My Reforger Server",
    "scenarioId": "{ECC61978EDCC2B5A}Missions/23_Campaign.conf",
    "mods": [
      {
        "modId": "5D831BAC7B3A0018",
        "name": "Example Mod One"
      },
      {
        "modId": "61B9EF6E7A6F1A2C",
        "name": "Example Mod Two"
      }
    ]
  }
}

Keep the rest of the file's structure intact — only add to the mods array, don't remove existing keys elsewhere in server.json.

Good to Know: Default Config

Your server ships with a default server.json that's playable out of the box: a starter scenario (Eden), a 16-player cap, and BattlEye and crossplay both enabled. It's the same file you edit to add mods, so this is a good time to also adjust the scenario or player cap if needed.

Next Steps

Also running an Arma 3 server? See Installing Mods on Your Arma 3 Server, which does have an in-app Workshop browser. Before editing server.json for the first time, back up your server with Managing Backups & Restoring Your Server.