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MCA Selector
What it is
MCA Selector is a free tool for selecting and modifying chunks and regions in Minecraft Java Edition world saves. It can export, delete or edit chosen areas, with filters based on conditions such as data version, last update time and inhabited time. Multiple conditions can be combined, and custom one-line Groovy scripts are supported through a Script Editor. Its chunk editor exposes the NBT structure, including points of interest and entity data, so tags can be changed, added, removed 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 display per-chunk values. A command-line mode handles tasks including selection creation, imports and exports, deletion, region defragmentation, NBT changes and image generation. Downloads include Windows, macOS and Linux builds, as well as a universal JAR; it works with Anvil .mca region files. The project lists support for Minecraft 1.2.1 through 1.21.11 and versions 26.1 through 26.3+, but warns snapshot-generated worlds are not guaranteed to work.
For and against
For
- Free under the MIT License.
- Filters can combine multiple chunk conditions.
- NBT editor includes poi and entities data.
- Command-line mode supports batch operations.
- Downloads include Windows, macOS, Linux and universal JAR.
Against
- Snapshot-generated worlds are not guaranteed to work.
- The project recommends backups before chunk changes.
- Supports Java Edition, not other listed Minecraft editions.
The verdict
MCA Selector offers detailed chunk filtering, editing and import tools for Anvil world saves. Back up a world first, and note the snapshot-world caveat before making changes.
Who it suits
It suits Minecraft Java Edition world-save users who need to select, inspect or modify chunks and regions. Command-line options may also suit users who want to run listed operations without starting the graphical interface.
Plans and prices
MCA Selector
MIT License · downloadable Windows, macOS, Linux and universal JAR builds
Read 30 Sep 2026 · github.com
On the record
- Chunk filtering
- Filters can select, export or delete chunks and regions using conditions such as data version, last update time and inhabited time, with multiple conditions chained together.github.com · read 30 Sep 2026
- Chunk import
- Chunks can be imported from another world with offsets, overwrite options, selection-only import, Y offsets and section ranges.github.com · read 30 Sep 2026
- CLI operations
- CLI modes include selection creation, chunk export, chunk import, region defragmentation, chunk deletion, NBT changes, cache image generation and image generation.github.com · read 30 Sep 2026
- Command line
- Using any command-line parameter switches MCA Selector to CLI mode without starting the GUI.github.com · read 30 Sep 2026
- Copy and paste
- Selections can be copied to the system clipboard and pasted into the same or a different world.github.com · read 30 Sep 2026
- Custom scripts
- The filter tool supports custom one-line Groovy scripts and a Script Editor.github.com · read 30 Sep 2026
- Downloads
- The repository provides Windows Installer, macOS arm64 and x64, Debian arm64 and x64, RPM arm64 and x64, and universal JAR downloads.github.com · read 30 Sep 2026
- License
- The software is released under the MIT License, permitting use, copying, modification, publication, distribution, sublicensing and sale subject to the license conditions.github.com · read 30 Sep 2026
- NBT editing
- The chunk editor allows editing the entire NBT structure, including poi and entities data, with tags that can be changed, added, deleted or moved.github.com · read 30 Sep 2026
- Notable limitation
- The project states that snapshot-generated worlds are not guaranteed to work even when a version appears in the supported-version table.github.com · read 30 Sep 2026
- Overlays
- Customizable overlays display per-chunk values as color gradients with configurable minimum and maximum values.github.com · read 30 Sep 2026
- Purpose
- MCA Selector exports, deletes or edits selected chunks and regions in Minecraft Java Edition world saves.github.com · read 30 Sep 2026
- Safety warning
- The project warns that MCA Selector modifies and deletes Minecraft world chunks and recommends making backups before use.github.com · read 30 Sep 2026
- Support
- The maintainer profile links to a Discord server.github.com · read 30 Sep 2026
- Supported versions
- The project lists support from Minecraft 1.2.1 through 1.21.11 and versions 26.1 through 26.3+.github.com · read 30 Sep 2026
