s&box Launch Command Builder
Build the exact sbox-server.exe launch command — +game (published or local .sbproj), +hostname, +port, +net_query_port, +net_game_server_token, optional map package. Validates branch (main/staging) requirements and outputs ready-to-run Run-Server.bat / run-server.sh.
Without a token, your server gets a fresh Steam ID on every restart — players have to re-add it.
Set the branch when installing via SteamCMD Builder.
Save as Run-Server.bat next to sbox-server.exe (default install at steamcmd/steamapps/common/sbox dedicated server).
How to use
- Install the s&box dedicated server using our SteamCMD Builder (app 1892930).
- Pick Published Package for a normal multiplayer server (e.g. facepunch.sandbox + facepunch.flatgrass), or Local .sbproj if you need server-side
#if SERVERcode. - Generate a GSLT at steamcommunity.com/dev/managegameservers to keep a stable Steam ID across restarts.
- Save the generated
Run-Server.batnext tosbox-server.exeand run it. - Add admins via users/config.json Generator.
s&box Dedicated Server Launch Flags
Facepunch documents five command-line switches for the s&box dedicated server (sbox-server.exe). They're passed as +convar value pairs — internally each is a console variable or command that fires at boot.
| Switch | Arguments | Description |
|---|---|---|
| +game | <packageIdent> [mapPackageIdent] | Game package to load. Either a published org.name ident or a path to a local .sbproj. Optional second arg = map package. |
| +hostname | <name> | Title shown in the server browser. |
| +net_game_server_token | <token> | GSLT to keep a stable Steam ID across restarts. Get one at steamcommunity.com/dev/managegameservers. |
| +port | <port> | Listen port. Default 27015. |
| +net_query_port | <port> | Query port (player count, current map). |
Published vs Local .sbproj
Most players run published games — a single +game facepunch.sandbox pulls everything from sbox.game. But if your game has server-side code that should stay private (an API key, database calls, anti-cheat logic), you have to run a local project. Pass a path to your .sbproj instead of an ident, and Facepunch's build pipeline keeps the #if SERVER blocks on the server only — published builds always strip them.
s&box Launch Command Builder — FAQ
Is this s&box Launch Command Builder free to use?
Yes, the s&box Launch Command Builder is 100% free — no signup required, no hidden fees, no downloads. Everything runs in your browser.
How accurate is the s&box Launch Command Builder?
Values are pulled from the s&box game files and community-verified formulas. Results match what you see in-game, and we update the tool when the game gets major patches.
Can I host a s&box server with XGamingServer?
Yes. XGamingServer offers instant s&box server hosting with mod support, automatic backups, DDoS protection, and 24/7 support. All popular game settings are pre-configured.
Does the Launch Command Builder work on mobile?
Yes, the Launch Command Builder is fully responsive and works on desktop, tablet, and mobile browsers.
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SteamCMD Builder
Generate copy-paste SteamCMD install/update scripts for the s&box Dedicated Server (app 1892930). Main vs staging branch toggle, validate option, anonymous login, side-by-side Windows .bat and Linux .sh.
users/config.json Generator
Visual editor for the s&box dedicated server admin file — add multiple Steam accounts with their SteamID64, display name, and claims (kick, ban, restart, plus your own custom claims). Validates SteamID format and outputs paste-ready users/config.json.
Steam ID Resolver
Convert any Steam profile URL, vanity URL, SteamID2 (STEAM_0:0:...), or SteamID3 ([U:1:...]) into the SteamID64 format that users/config.json and most server tools require. All formats shown side-by-side with copy buttons.
RPC Generator
Generate s&box [Rpc.Broadcast], [Rpc.Owner], and [Rpc.Host] method skeletons in C#. Configure NetFlags (Unreliable, Reliable, SendImmediate, DiscardOnDelay, HostOnly, OwnerOnly), define typed parameters, and copy ready-to-paste code with the right attribute, signature, and Rpc.Caller hook.
Config Tool Built Into XGamingServer
Get managed s&box hosting with this tool in your panel — configure, deploy, and play in minutes. No file uploads needed.