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Querz/mcaselector

A Java desktop tool for selecting chunks and regions in a Minecraft Java Edition world save and deleting or exporting them.

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What is it?

MCA Selector is an external desktop tool for Minecraft Java Edition worlds. It lets you browse a world save as a grid of chunks and regions, mark the ones you want, and then delete them or export them. This is useful for resetting areas of a world, such as the Nether or End dimensions after an update, or clearing out parts of a map that are no longer needed.

The tool works directly on the .mca region files in a world save, so it runs outside the game. It is distributed as a JavaFX application with installers for Windows, macOS and Linux (DEB and RPM), as well as a universal jar. The project lists supported Minecraft versions from 1.2.1 through 26.1, with a data version table for each range.

Because the tool modifies and deletes chunks, the project strongly recommends backing up a world before use, and warns that worlds from snapshot versions are not guaranteed to work.

Key features

  • 01Select chunks and regions in a world save through a grid view.
  • 02Delete selected chunks or regions from a world.
  • 03Export selected chunks or regions.
  • 04Runs as a JavaFX desktop app on Windows, macOS and Linux, or as a universal jar.
  • 05Supports Minecraft Java Edition versions from 1.2.1 through 26.1.

Use cases

  • Resetting the Nether or End dimension after a Minecraft update.
  • Clearing unwanted generated chunks from a long-running survival world.
  • Exporting parts of a world to reuse or archive.

Quick start

  1. 1

    Make a backup of your world before using the tool

  2. 2

    Download the installer or universal jar from the official GitHub releases page

Things to know

  • It modifies and deletes chunks in your world, so a backup is essential before use.

In collections

Desktop GUI apps & toolkits

Topics

#minecraft#java#javafx#desktop-app#game-tools#save-editing#chunks#delete#export#mca-file

FAQ

What is mcaselector?
A Java desktop tool for selecting chunks and regions in a Minecraft Java Edition world save and deleting or exporting them. MCA Selector is an external desktop tool for Minecraft Java Edition worlds. It lets you browse a world save as a grid of chunks and regions, mark the ones you want, and then delete them or export them. This is useful for resetting areas of a world, such as the Nether or End dimensions after an update, or clearing out parts of a map that are no longer needed.
Is mcaselector free to use? What license does it have?
mcaselector is open source under the MIT license. Check the license terms before using it in commercial products.
Is mcaselector still maintained?
Actively maintained. The last commit to mcaselector was on Nov 4, 2026.
What can I use mcaselector for?
Resetting the Nether or End dimension after a Minecraft update. Clearing unwanted generated chunks from a long-running survival world. Exporting parts of a world to reuse or archive.
How do I install mcaselector?
Make a backup of your world before using the tool Download the installer or universal jar from the official GitHub releases page
Where can I get mcaselector?
The source code and installation instructions are on GitHub: https://github.com/Querz/mcaselector

Summary generated by AI from the project's README. GitHub stats refresh daily.

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