"Offline" Minecraft Install Guide
Tested with Minecraft 1.20.1 and Prism 7.2
Install Prism Launcher
Use Prism Launcher.
- It allows you to manage multiple installs of minecraft as well as installing and managing mods of every kind.
- It's an open source fork of MultiMC (made unofficially by one of the Minecraft developers).
- It's NOT some dodgy hacked client likely to give you a virus.
You may need to install a Java Runtime Enviroment
Prism won't install a JRE for you, unlike the official launcher.
Minecraft requires a JRE to work and it is no longer distributed as installable package as was the case with Java 8. Instead you can install a JDK (Development Kit) distrubtion. Prism's docs recommend Adoptium or Azul.
- Install JDK 17 or higher.
Apply the "Crack"
First Make sure the Prism Launcher is closed.
Make the file accounts.json
And put it in the same folder you unzipped Prism into (portable) or %appdata%/PrismLauncher/
(if you used the installer).
Yep, it's a just a configuration file.
Create a new Account ( follow carefully )
- Top right corner of the window: Click "Accounts" -> "Manage Accounts".
- Rightside "Add Offline" ...choose a name etc.
- Select it and "Set Default" , Now you can avoid using the DONOTUSE account.
Back in the main window
Play online
You can now play on servers that are (ironically) in "offline mode".
- Create an instance "Add instance", maybe install a modpack or two.
- Select an "instance" (minecraft setup) and Launch
If you have any problems following these steps.
- Use task manager to kill
prismlauncher.exe
( in "details" tab) - Delete and remake the
accounts.json
...and you should be able to able to redo "Create a new Account" steps.
You've won at Minecraft.
Make an offline server
If you already know how to setup a server, then this will make it available to "offline" accounts.
Be warned: anyone with your server address can join with what ever name they choose.
Just modify the server.properties
in your minecraft server folder. Vanilla, PaperMC, Spigot, etc: they all have this file.
Change the line online-mode=true
to online-mode=false
.