How to Change the Difficulty on a Minecraft Server

To change the difficulty on a Minecraft Java server, stop the server, set difficulty= in server.properties to peaceful, easy, normal or hard, and start it again. It applies to your existing world straight away, with nothing reset. An operator can also type /difficulty hard in game, but on a server that only lasts until the next restart, when the value in server.properties loads again. Hardcore is different: it is fixed when the world is created and cannot be switched on from the file.

What you can change on an existing world

What each difficulty does

The old numbers still work (0 peaceful to 3 hard) and the server converts them to names, but use the names.

Step 1: Back up first

Changing difficulty does not touch your builds, but switching to peaceful removes every hostile mob in loaded areas, including named ones and mob farms full of them. Make a backup first if your world has mobs you care about.

Step 2: Stop the server

Type stop in the console. The server reads server.properties only when it starts, so editing it while the server runs does nothing until the next restart.

Step 3: Edit server.properties

Open server.properties in the server's main folder and change one line:

difficulty=normal

Leave hardcore=false as it is unless you are creating a new world (see below). Save the file.

Step 4: Start and check

Start the server and join. Type /difficulty with no value to see the current one, or press F3 and look for the local difficulty line. If the value is wrong, check for a typo: anything the server does not recognise falls back to its default.

Why does /difficulty reset after a restart?

This is the part that confuses most people. In single player, /difficulty changes the world and stays. On a server, the Minecraft wiki notes that the difficulty lasts only until the server restarts, and then it is reloaded from server.properties.

So the command is good for a quick test, but the file is what counts. If your group wants hard permanently, put difficulty=hard in the file. Running /difficulty hard every evening means it silently falls back the moment the server restarts, whether that was you, a crash or a scheduled restart.

/difficulty needs operator permission. See how to op someone on a Minecraft server.

Can I turn an existing world into hardcore?

Not from server.properties. The hardcore key only decides whether newly created worlds are hardcore. The flag itself lives in the world's level.dat, so flipping the line on a world that already exists does nothing. Two ways around it:

1. Start a new world with hardcore=true set before it generates. Change level-name= to a new folder name, or move the old world folder out, then start the server. This is the clean way, covered in how to make a Minecraft hardcore server.
2. Edit level.dat with an NBT editor such as NBTExplorer: stop the server, download world/level.dat, set the hardcore byte under Data to 1 (or 0 to turn it off), and upload it again. Keep a backup, because a broken level.dat stops the world loading.

In a hardcore world the difficulty is locked to hard, players who die become spectators, and /difficulty does nothing.

Common problems

• Difficulty goes back after a restart: you only used /difficulty. Put the value in server.properties.
• The file change did nothing: the server was running when you edited it, or the line has a typo like difficulty=Hard with a trailing space. Stop, fix, start.
• Hardcore=true but players still respawn: the world was created before you set it. Hardcore only applies to new worlds unless you edit level.dat.
• Can't change difficulty at all: the world is hardcore, or you are not an operator.
• Mob farm stopped working: the server is on peaceful, where hostile mobs do not spawn.

Changing the difficulty on GamezServers

On a GamezServers Minecraft server, press Stop, open server.properties in the Files tab, change difficulty= and press Start. The panel only manages the port and the server list message in that file, so your difficulty stays exactly as you set it. Make yourself an operator from the dashboard with Make operator to use /difficulty in game, and take a one click Backup before switching to peaceful. Every other key is in Minecraft server.properties explained.

FAQ

How do I change the difficulty on my Minecraft server permanently?

Set difficulty= in server.properties with the server stopped, then start it. The /difficulty command resets on the next restart.

Does changing difficulty reset my Minecraft world?

No. It applies to the existing world on the next start, and your builds and inventories stay. Peaceful does remove hostile mobs.

Can I turn hardcore off on a Minecraft server?

Not with server.properties. Hardcore is stored in the world's level.dat, so you need an NBT editor to change it, or a new world.

Why can't I use /difficulty on my server?

You need to be an operator, and the command does nothing in a hardcore world, which is locked to hard.