MCA Selector

MCA Selector is a desktop tool for managing chunks and regions in Minecraft Java Edition saves, best suited to players who need precise control over world data. It combines filtering, editing, importing and command-line operations in a free MIT-licensed package.

Overview

Use MCA Selector to export, delete or edit selected chunks and regions in Anvil .mca world files. It is aimed at maintenance and targeted changes rather than terrain creation: terrain editing is not supported, but entity editing and batch operations are.

The supported-version range runs from Minecraft 1.2.1 through 1.21.11 and includes versions 26.1 through 26.3+. Snapshot-generated worlds are not guaranteed to work, even when their version appears in that range. Since edits and deletions can affect world data, make a backup before using the tool.

Key features

Filter and manage chunks

Filter by properties such as data version, last update time and inhabited time, combining multiple conditions to narrow a selection. Matching chunks and regions can be selected, exported or deleted. One-line Groovy scripts and a Script Editor let users build more tailored filters, though that flexibility is most useful to people comfortable writing scripts.

Edit and transfer world data

The chunk editor exposes the full NBT structure, including POI and entity data, and lets users change, add, delete or move tags. This depth is useful for detailed data corrections, but it also raises the stakes of editing; backups are especially prudent before changing unfamiliar structures.

Import chunks from another world with controls for offsets, overwriting, selection-only imports, Y offsets and section ranges. Selections can also be copied to the system clipboard and pasted into the same or another world. Customizable overlays render per-chunk values as color gradients with configurable minimum and maximum values, helping users inspect data patterns before acting.

Command-line operations

Supplying any command-line parameter switches the application to CLI mode without opening the GUI. CLI modes cover selection creation, chunk export and import, region defragmentation, chunk deletion, NBT changes, cache image generation and image generation. This suits repeatable or scripted maintenance; users who prefer a visual workflow can use the GUI instead.

Pricing

MCA Selector costs nothing under the MIT License. The free plan includes downloadable Windows, macOS, Linux and universal JAR builds, with no paid tier to weigh against the core editing tools. The MIT License permits use, copying, modification, publication, distribution, sublicensing and sale, subject to its conditions.

Platforms

Downloads include a Windows installer, macOS arm64 and x64 builds, Debian and RPM packages for arm64 and x64, and a universal JAR. The supported Minecraft edition is Java; this is not a tool for Bedrock worlds.

Who it's for

MCA Selector is a strong fit for Java Edition players who need to filter, move, inspect or remove chunks, especially when they want batch or command-line workflows alongside detailed NBT editing. It is a poor match for users looking to sculpt terrain, work on Bedrock saves, or rely on guaranteed compatibility with snapshot-generated worlds.

Pros and cons

• Pros: Detailed filters, full NBT access and configurable import controls support precise world maintenance.
• Pros: Free MIT-licensed downloads span Windows, macOS and Linux, with a universal JAR option.
• Cons: It does not edit terrain, so map-making and terrain-shaping tasks call for another tool.
• Cons: Snapshot-world compatibility is not guaranteed, and destructive chunk operations make backups important.

Alternatives

Browse the Minecraft World Editors list to compare tools by purpose. Choose Chunker instead if its Linux, macOS, Windows and web platform options suit your workflow; it is free and open source under MIT.

MCBE Inventory Editor is another free option to consider. Minecraft World Trimmer is a free alternative for readers considering an MIT-licensed tool provided as-is with no warranty.

Bedrock Toolchest is free, runs on Linux and Windows, and has no paywalls, subscriptions or account requirement. biomed is a free MIT-licensed alternative whose license permits use, modification and distribution subject to its conditions.

Minecraft Region Fixer is free and requires Python 3.x; WorldPainter is free and open source under GPL version 3. Dovetail is a web and API option with a free plan for one channel and one project, basic chat and AI summaries, plus an Enterprise plan with custom pricing.

Verdict

Choose MCA Selector if you need free, cross-platform tools for precise Minecraft Java chunk and region operations, including NBT edits and CLI workflows. Look elsewhere if your priority is terrain editing or dependable support for snapshot-generated worlds; before any destructive change, keep a backup.