All free tools
World border planner.
Plan a Java world border and generate the matching commands.
Final bounds: X -500 to 500; Z -500 to 500. Requires Java server operator permissions.
Commands for Java Edition
The generated commands set the border centre and diameter. Run them with the necessary server permissions. This planner deliberately limits diameter to one million blocks; it does not describe the game’s maximum.
Back up before changing a border
A border limits movement and does not automatically delete chunks or pre-generate terrain. Review existing builds and player positions before applying it.
Free to use. No account required. Inputs stay in your browser.