server.properties holds one key=value per line. There are 72 keys. Each value is validated when the file is read: a bad value is reported in the log and the default is used.
Booleans accept true, false, 1 and 0, except movement-simulation, simulation, server-authoritative-block-breaking and disable-client-vibrant-visuals, which accept only true and false.
Identity and rules
Key
Default
Effect
server-name
Falcon Server
Name shown to clients
language
en_US
Server language
gamemode
survival
survival, creative, adventure or spectator. Numbers 1, 2 and 6 also map to the last three
difficulty
easy
peaceful, easy, normal or hard
allow-cheats
true
Sets the commands-enabled flag sent to clients
max-players
10
1 or more
default-player-permission-level
member
visitor, member or operator
spawn-protection
16
Radius around spawn where non-operators cannot change blocks
disable-player-interaction
false
Sent to clients in the start-game data
Network
Key
Default
Effect
server-port
19132
IPv4 port, 1 to 65535
server-portv6
19133
IPv6 port, 1 to 65535
transport
nethernet
The only accepted value
online-mode
true
Checks Xbox Live authentication at login
network-encryption
true
Encrypts the connection
enable-lan-visibility
true
Announces the server on the LAN
allow-list
false
Only allowlist.json entries can join. An empty list logs a warning
any-version
false
Lets every supported protocol join, not only the newest
compression-threshold
1
0 to 65535, sent to clients in the network settings
compression-algorithm
zlib
zlib or snappy
With any-version on, older clients still receive the blocks, items and recipes of the newest version, and the server logs a warning.
Worlds and performance
Key
Default
Effect
level-name
Bedrock level
Main world, under worlds/
level-seed
empty
Seed of a new world
worlds-autoload
empty
Other worlds to load at startup, comma-separated
view-distance
32
4 to 96 chunks
tick-distance
4
4 to 12 chunks. Chunks ticked around each player
max-threads
8
0 to 256. Worker threads
autosave-interval
6000
Ticks between autosaves. 0 turns autosave off
auto-compaction-interval
360
Seconds between world database compactions. 0 turns it off
client-side-chunk-generation-enabled
false
Sent to clients in the start-game data
block-network-ids-are-hashes
true
Sends block network IDs as hashes
movement-simulation
false
Replays player movement on the server and corrects clients that diverge from it
simulation
true
Former name of movement-simulation, still read when that key is absent
Packs, skins and logs
Key
Default
Effect
texturepack-required
false
Forces clients to accept the packs
disable-custom-skins
false
Sent to clients in the start-game data
skin-change-cooldown
30
Minimum seconds between skin changes
disable-client-vibrant-visuals
true
Forces Vibrant Visuals off on clients
content-log-console-output-enabled
false
Prints content logs to the console
Movement and block breaking
Key
Default
Effect
server-authoritative-movement-strict
false
Corrects every mismatch instead of absorbing small ones. No effect while movement-simulation=false
server-authoritative-block-breaking
false
The server checks break progress
server-authoritative-block-breaking-range-scalar
1.5
Must be above 1. Scales the allowed reach. Also read as server-authoritative-block-breaking-pick-range-scalar
player-position-acceptance-threshold
0.5
Squared distance, in blocks, between the reported and simulated position above which movement is corrected
player-movement-action-direction-threshold
0.85
How directly a player must face a target to act on it, as a cosine from 0 to 1
player-tick-throttled-input-batch-size
-1
-1 or more. Input batching limit
player-tick-throttled-max-tick-credits
-1
-1 or more. Input tick credit limit
A file without movement-simulation keeps its simulation value, or turns the simulation on when strict mode is on.
Join by address
The client tries HTTPS before HTTP on the signaling port, and beside port 19132 it also tries 443 and 80.
Key
Default
Effect
signaling-certificate
empty
PEM certificate chain for HTTPS on the signaling port
signaling-private-key
empty
PEM private key of that certificate
signaling-extra-port
0
Second signaling port, 0 for none. Set 443 so clients typing port 19132 join without waiting
signaling-acme-domain
empty
Domain players type. When set, the certificate is obtained and renewed with ACME into certificates/
signaling-acme-email
empty
Contact address sent to the ACME directory
signaling-acme-directory
Let's Encrypt
ACME directory URL, https:// only
signaling-acme-challenge
tls-alpn-01
tls-alpn-01 answers on TCP 443, http-01 on TCP 80
A complete certificate and key pair takes precedence over ACME.
Rate limits
Key
Default
max-inbound-packets-per-second
2500
max-commands-per-second
10
max-chat-messages-per-second
2
max-form-responses-per-second
20
max-movement-packets-per-second
40
max-chat-message-length
512
chat-restriction
None. Also Dropped or Disabled
Wasm plugins
Key
Default
Effect
wasm-plugin-memory-mb
64
1 to 4096. Memory limit per plugin
wasm-plugin-fuel
10000000
1 or more. Fuel per server call
Reserved keys
The server accepts and validates these keys, but they have no effect in the current version:
