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MCA Selector

github.com

  • Free
  • Windows
  • Linux
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What it is

MCA Selector is a free tool for selecting and modifying chunks and regions in Minecraft Java Edition world saves stored as Anvil .mca region files. Filters can identify chunks by conditions such as data version, last update time, and inhabited time, with multiple conditions chained together. The filter tool also accepts custom one-line Groovy scripts through a Script Editor. Its chunk editor exposes the full NBT structure, including points of interest and entities, so tags can be changed, added, deleted, or moved. Chunks can be imported from another world with offsets and overwrite options, and selections can be copied or pasted through the system clipboard. Color-gradient overlays show per-chunk values. A command-line mode supports selection creation, chunk import and export, deletion, region defragmentation, NBT changes, and image generation. Downloads are available for Windows, macOS, and Linux, as well as a universal JAR. Snapshot-generated worlds are not guaranteed to work even when a version appears in the support table. The project recommends backing up worlds because the tool can modify or delete chunks.

Good, and not so good

  • Filters can combine multiple conditions
  • NBT editor includes entity and point-of-interest data
  • Import chunks with offsets and overwrite options
  • Command-line mode supports batch operations
  • Downloads include Windows, macOS, Linux, and universal JAR
  • Snapshot-generated worlds are not guaranteed to work
  • Can modify or delete chunks, so backups are advised
  • Supports Java Edition Anvil .mca region files

Who it suits

MCA Selector suits Minecraft Java players who need to filter, move, export, delete, or edit chunks in a world save. Its scripts and command-line mode may also suit users automating chunk operations.

MCA Selector offers detailed chunk selection and editing, including scriptable filters and command-line operations. Back up the world first, and note that snapshot-world compatibility is not guaranteed.

Plans

  • MCA SelectorMIT License · downloadable Windows, macOS, Linux and universal JAR buildsFree

As github.com lists them, read 30 Sept 2026.