MCA Selector is a desktop application for selecting and manipulating chunks in Minecraft Java Edition world saves.
The tool addresses the problem of managing world data at a granular level by providing a graphical interface to visualize, select, and operate on individual chunks and regions within a Minecraft world file. It works by reading the MCA region file format that Minecraft uses to store world data, displaying a grid overlay of chunks and regions, and allowing users to mark specific areas for deletion or export. This approach lets players surgically remove unwanted terrain—such as chunks affected by bugs, old terrain from previous updates, or areas they wish to reset—without affecting the rest of their world.
MCA Selector is suited for players managing long-running survival worlds who need to selectively regenerate terrain or remove problematic chunks, and for those preparing worlds for major Minecraft updates. It is particularly useful for resetting dimensions like the Nether or End after updates introduce new generation features. The tool operates as a standalone external utility rather than a mod, making it compatible with vanilla Minecraft installations. Users should be aware that the tool directly modifies world files and can delete data, so backups are essential before use.
The project maintains active engagement with its user community through a dedicated Discord server. Development includes regular updates addressing user needs and compatibility with new Minecraft versions. The tool is distributed across multiple platforms with native installers for Windows and macOS, as well as Linux packages in DEB and RPM formats, alongside a universal JAR option for broader compatibility.
