server.properties Checker
Paste your Minecraft server.properties to see what every line does and catch settings that are risky or slowing your server down. It's checked in your browser - your file isn't uploaded anywhere.
8 settings found.
Summary
Online mode is off, so anyone can join using any name, including an admin's. That's only safe behind a proxy (Velocity or BungeeCord) that checks accounts, with this server's port closed to the internet.
RCON is on with a short or empty password. Anyone who finds the port can run any command. Use a long random password, or turn RCON off.
A view distance of 16 is heavy on RAM and CPU. 8 to 10 is plenty for most servers.
Line by line
motd=A Minecraft Server
The message under your server's name in the multiplayer list.
server-port=25565
The port players connect on. 25565 lets them join without typing a port.
max-players=20
How many players can be online at once.
online-mode=false
Checks every player owns a real Minecraft account. Only turn this off on servers behind a proxy (Velocity or BungeeCord) that does the check instead.
Default: true
Online mode is off, so anyone can join using any name, including an admin's. That's only safe behind a proxy (Velocity or BungeeCord) that checks accounts, with this server's port closed to the internet.
view-distance=16
How many chunks around each player are sent to them. The biggest single setting for performance.
Default: 10
A view distance of 16 is heavy on RAM and CPU. 8 to 10 is plenty for most servers.
enable-rcon=true
Remote console access. Gives full control of the server to anyone with the password.
Default: false
rcon.password=(empty)
Password for remote console access. Use a long random one.
RCON is on with a short or empty password. Anyone who finds the port can run any command. Use a long random password, or turn RCON off.
white-list=false
Only players on the whitelist can join.
Want to change things? Open the server.properties generator to build a fresh file with every setting explained.