# Querz/mcaselector

A tool to select chunks from Minecraft worlds for deletion or export.

Repository: https://github.com/Querz/mcaselector
Canonical: https://ross.abutalabs.com/products/mcaselector
Language: Java
License: MIT
License Family: permissive
Topics: mca-region, minecraft, minecraft-tool, chunks, minecraft-world, minecraft-saves, mca-file, delete, export, javafx
Last push: 2026-07-18T03:57:27+00:00

## Health v2 (maintenance only)
Score: 89/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 93, release rhythm 77, longevity 100
- inputs: {"age_days": 3055, "days_push": 46, "days_rel": 79, "gap_med": 76.0, "n_releases_24m": 9}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4753, forks 234 (observed 2026-08-28T04:08:58.726607+00:00)

## What it is
MCA Selector is a desktop GUI application for selecting, deleting, and exporting chunks and regions from Minecraft Java Edition world saves (.mca files). It is built in Java with JavaFX and ships installers for Windows, macOS, and Linux.

## Use cases
- delete unwanted chunks from a Minecraft world save
- export selected regions of a Minecraft world to a new file
- reset chunks so they regenerate with new game versions
- trim a huge Minecraft save to reduce file size
- visually browse a Minecraft world's chunk grid
- merge or import chunks between Minecraft worlds

## When to choose
- you need to surgically remove or export chunks from a Minecraft Java Edition save
- you want a visual GUI instead of editing .mca files manually
- you need to prepare a world for a Minecraft version update by regenerating chunks

## When to avoid
- you play Minecraft Bedrock Edition rather than Java Edition
- you need in-game world editing rather than save-file manipulation
- you are unwilling to back up your world, since the tool permanently deletes chunks

## Facets
- artifact type: application
- maturity: active
- function: gui, file-system, developer-tools
- domain: gaming-tools, files, cross-platform
- platform: windows, cross-platform, jvm
- tags: minecraft, mca-region, chunk-editor, javafx, world-editing, macos, linux, desktop

## Member repositories
- Querz/mcaselector (main) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:58.726607+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:18:54.400499+00:00, confidence not recorded.
  - readme: https://github.com/Querz/mcaselector (fetched 2026-08-28T04:08:58.726607+00:00, sha 4f13b96b645e)
- Data as of 2026-08-30T08:39:29.467469+00:00.