Arma Reforger config.json Validator

Paste your Arma Reforger config.json and catch syntax errors, invalid port ranges, bad scenarioId format, case-sensitive rcon.permission mistakes, and PSN+mods conflicts before the server silently fails to start.

Paste your config.json, drop a file, or load an example. All validation runs in your browser — nothing is uploaded.

Validation Results

Paste your config and press Validate

Open in Server Config

Attempt auto-fix

Auto-fix tries to: strip // single-line comments, remove trailing commas, convert single-quoted strings to double-quoted, and trim trailing whitespace. Always review the diff before applying.

Arma Reforger config.json Field Reference

Reforger’s config.json is parsed as strict JSON — field names are case-sensitive and a single trailing comma will abort startup. The table below lists every major field, its type, and a working example.

Field	Type	Example	Notes
bindAddress	string	"0.0.0.0"	Interface to bind — 0.0.0.0 listens on all
bindPort	integer	2001	Game port (UDP), 1024–65535
publicAddress	string	""	Advertised IP — leave empty for auto
publicPort	integer	2001	Usually matches bindPort
a2s.address	string	"0.0.0.0"	A2S query bind
a2s.port	integer	17777	Query port (UDP), must differ from bindPort
rcon.address	string	"0.0.0.0"	RCON bind address
rcon.port	integer	19999	RCON port (UDP), must be unique
rcon.password	string	"long-password"	Required if rcon block exists, no spaces
rcon.permission	string	"admin"	Exactly "admin" or "monitor" — case-sensitive
rcon.maxClients	integer	16	1–32
game.name	string	"My Server"	1–100 chars, shown in browser
game.password	string	""	Join password, empty for open
game.passwordAdmin	string	"..."	Password for in-game admin login
game.admins	string[]	["76561198..."]	SteamID64 list, 17 digits starting 7656
game.scenarioId	string	"{ECC61...}Missions/23_Campaign.conf"	UPPERCASE hex in braces
game.maxPlayers	integer	64	1–128
game.visible	boolean	true	false = hidden from browser
game.crossPlatform	boolean	true	Enable PC+console play
game.supportedPlatforms	string[]	["PLATFORM_PC","PLATFORM_XBL"]	Adding PLATFORM_PSN disables mods
game.mods	object[]	[]	Workshop mods — empty for vanilla
game.gameProperties.serverMaxViewDistance	integer	2500	100–3000
game.gameProperties.networkViewDistance	integer	1500	≤ serverMaxViewDistance
game.gameProperties.battlEye	boolean	true	Anti-cheat toggle
operating.aiLimit	integer	-1	-1 unlimited, 0 disabled, or positive int
operating.disableAI	boolean	false	If true, aiLimit is ignored
operating.playerSaveTime	integer	120	Seconds between player saves
persistence.autoSaveInterval	integer	300	0 disables auto-save

Common config.json Errors and Fixes

Trailing commas — a comma after the last item in an object or array aborts JSON parsing and the server exits before logging anything useful. Remove the stray comma or run Auto-fix.
Case-sensitive rcon.permission — must be exactly "admin" or "monitor" (lowercase). "Admin" and "ADMIN" fail silently.
networkViewDistance greater than serverMaxViewDistance — the network distance must be ≤ the render distance. Lower one or raise the other.
PS5 crossplay with mods — including PLATFORM_PSN in supportedPlatforms while game.mods is non-empty disables modding entirely. Pick one.
Port conflicts — bindPort, a2s.port, and rcon.port must all be different (defaults 2001 / 17777 / 19999).
Invalid scenarioId format — must be {HEX_UPPERCASE}Missions/Name.conf. Lowercase hex or missing braces is rejected.
Invalid SteamID64 in game.admins — each entry must be a 17-digit string starting with 7656.
Weak or default rcon.password — "admin", "password", and "changeme" are common brute-force targets. Use a long random password with no spaces.
maxPlayers above 128 — Reforger’s engine caps at 128 slots. Higher values are rejected.
Single quotes or // comments — JSON is strict. Use double quotes and no comments at all; Auto-fix can strip the common cases for you.

How to Validate Arma Reforger Configs

Stop your Reforger server so nothing holds a lock on config.json.
Open the file from your server root (or the XGamingServer File Manager) and copy its full contents.
Paste into the editor above, press Validate, and fix every red error before restarting.
If you see green “All checks passed”, upload the file back to the server and restart. Still failing? Check profile/logs/console.log for scenario/mod errors.

Where config.json Lives

Windows

C:\ArmaReforgerServer\config.json
Default SteamCMD install path for a self-hosted Windows server.

Linux

/home/xgaming/reforger/config.json
Or wherever you launched ArmaReforgerServer from — always relative to the working directory.
On XGamingServer: File Manager → server root.

FAQ

Arma Reforger config.json Validator — FAQ

Is this Arma Reforger config.json Validator free to use?

Yes, the Arma Reforger config.json Validator is 100% free — no signup required, no hidden fees, no downloads. Everything runs in your browser.

How accurate is the Arma Reforger config.json Validator?

Values are pulled from the Arma Reforger 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 Arma Reforger server with XGamingServer?

Yes. XGamingServer offers instant Arma Reforger server hosting with mod support, automatic backups, DDoS protection, and 24/7 support. All popular game settings are pre-configured.

Does the config.json Validator work on mobile?

Yes, the config.json Validator is fully responsive and works on desktop, tablet, and mobile browsers.

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