Minecraft Server.properties Generator

Allows players to fly on the server when using a mod or plugin that supports flight. Has no effect in Creative mode. Without a flight-enabling mod, flying players will be kicked if this is disabled.

Controls the overall difficulty level of the server. Peaceful removes hostile mobs and regenerates health. Easy, Normal, and Hard progressively increase enemy danger and damage.

When enabled, all players are placed into the server's default game mode each time they join, overriding any game mode they had previously.

The game mode assigned to new players when they first join the server. Existing players retain their current game mode unless force-gamemode is also enabled.

Enables Hardcore mode on the server. When a player dies, they are permanently switched to Spectator mode and can no longer interact with the world.

The number of minutes a player can remain idle before being automatically kicked from the server. Set to 0 to disable the idle timeout entirely.

How many chunks around each player the server loads and sends. The client cannot render further than this value.

Controls what percentage of the view distance at which entities are tracked and sent to clients. Higher values render entities from farther away but increase bandwidth and server CPU load.

The maximum radius, in blocks, that the world border can ever be set to. The border itself must still be moved with /worldborder — this value is only a hard cap.

How far from each player the server ticks entities and simulates game mechanics, measured in chunks.

The radius of the spawn protection zone. The protected area is a square centered on the world spawn point with a side length of 2x+1 blocks.

Controls whether the world generator creates naturally occurring structures such as villages, temples, strongholds, ocean monuments, and woodland mansions.

A JSON object used to customize world generation parameters. Primarily used with flat and single-biome world presets. Refer to the Minecraft wiki for the expected format.

Sets both the display name of the world and the name of the folder where world data is saved. Changing this after world creation causes the server to load or generate a different world.

The seed used to generate the world. Leave empty to use a random seed. Must be set before the world is first created — changing it afterwards has no effect on an existing world.

When enabled, any online players not present in the whitelist are kicked immediately after the whitelist is reloaded with /whitelist reload.

Restricts server access to only players listed in the whitelist.json file. Players not on the whitelist will be unable to join.

When enabled, server console output is forwarded in-game to all online players with operator status.

When enabled, commands executed via RCON are broadcast in-game to all online operators so they can see remote activity.

Requires players to have a Mojang-signed public key. When enabled, clients that do not support signed chat messages will be unable to connect.

When enabled, the player list is omitted from server status responses. The server still reports the player count, but individual names are not disclosed.

Controls whether player IP addresses are written to the server log when they connect. Disable for privacy compliance or to reduce log verbosity.

The maximum number of players who can be connected at the same time. Operators can join even when this limit is reached.

When enabled, the server authenticates players against Mojang's servers, ensuring only valid Minecraft accounts can join. Disable only for private LAN or offline servers.

The IP address the server binds to. Leave empty to bind to all available network interfaces. Useful on machines with multiple network adapters.

The TCP port the server listens on for incoming player connections. The default is 25565. Make sure this port is open in your firewall and router.

Enables the GameSpy4 query protocol, which allows external tools and server listing sites to retrieve information about the server over UDP.

Enables the RCON protocol, allowing remote execution of server console commands over TCP. Secure with a strong password and restrict the port from public access.

The password required to authenticate with the RCON server. Use a strong, unique password — RCON grants full console access to whoever connects.

The TCP port the RCON server listens on. Ensure this port is firewalled from public access to prevent unauthorized control of the server.

Forces players to accept and download the server resource pack before joining. Players who decline the prompt will be disconnected.

The SHA-1 hash of the resource pack file, in lowercase hexadecimal. Strongly recommended — used by the client to verify the download and skip re-downloading an unchanged pack.

A comma-separated list of datapack names that should not be automatically enabled when a new world is created.

A comma-separated list of datapacks to enable at world creation. Always includes vanilla. Experimental feature packs must be listed here explicitly to be activated.

Path or URL to an external text filtering service configuration. When set, chat messages and written book content are passed through the service for moderation.

Specifies the configuration format version expected by the text filtering service defined in text-filtering-config.

A comma-separated list of HTTP Origin header values permitted to make requests to the management server. Leave empty to block all clients.

Enables the Minecraft Server Management Protocol (MSMP), which exposes a REST-like HTTP API for managing and monitoring the server programmatically.

The hostname or IP address the management server binds to. Defaults to localhost to prevent external access.

The port the management server listens on. Set to 0 to let the operating system assign an available port automatically.

When enabled, the management server encrypts all connections using TLS. A keystore file must be provided via management-server-tls-keystore.

File path to the Java keystore (.jks or .p12) containing the TLS certificate and private key. The server will refuse to start if TLS is enabled but this is not set.

How often, in milliseconds, the management server sends a heartbeat notification to connected clients. Set to 0 to disable heartbeats entirely.

An internal debug flag whose exact effect is undocumented. Even Mojang's own wiki doesn't explain what it does — use with caution.

Caps the number of consecutive block neighbor updates (e.g., from falling sand or redstone chains) before additional ones are skipped. Prevents server hangs from update loops. Negative values remove the cap.

Packets smaller than this value (in bytes) are sent uncompressed; packets at or above it are compressed. A lower threshold means more packets get compressed, but compressing very small payloads can produce larger output than the original.

The number of seconds the server waits with no players online before pausing the game loop. Set to -1 to never pause.

The compression algorithm used when saving chunk data to region files. deflate is the standard; lz4 is faster but produces larger files; none disables compression entirely.

When enabled, chunk data is flushed to disk synchronously before the server continues. This improves data integrity on crashes but may reduce write performance.

Enables Linux-specific network optimizations using native I/O, improving packet throughput and reducing latency on Linux hosts. Has no effect on other operating systems.