Use your own server jar

1. Press Stop, then open the Files tab (or connect with SFTP, details on the Settings tab) and upload your jar to the main folder.
2. Open the Startup tab and set Server Jar File to the exact name of your jar, for example my-server.jar.
3. Start the server. Or use the Jar Picker tab to switch to Paper, Purpur, Fabric, Forge, NeoForge, Vanilla or Velocity.

The startup command and Java image are managed by us (the Java version is picked automatically). Your own jar must follow the terms: no crypto mining, attack tools or open proxies (see the acceptable use policy).