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Minecraft World Trimmer
What it is
Minecraft World Trimmer is a free utility for removing unused chunks from Minecraft Java worlds to reclaim storage. It locates regions with little player activity and deletes them. The default threshold is 10 minutes, or 600 seconds, of player time per region, and the -t option changes that value. The program uses all available CPU cores by default, while -c sets a custom count. A live progress counter and -q, -u, and -v output options provide run controls. Starting without arguments opens an interactive terminal interface that can discover dimensions, world folders, or a Minecraft saves folder. It supports .mca region files and batch operations on Linux, macOS, and Windows. Windows users can download an executable ZIP from the GitHub release tab; macOS and Linux users must install Python and dependencies including cursesplus and anvil-parser2. The README warns that running it on a new world may destroy chunks containing player data. It is released under the MIT License.
For and against
For
- Free under the MIT License
- Adjustable deletion threshold
- Uses multiple CPU cores
- Interactive terminal mode
- Supports batch region operations
Against
- Can destroy player data on new worlds
- Non-Windows systems require Python setup
- Command-line tool requires careful operation
The verdict
Minecraft World Trimmer provides configurable region cleanup with an interactive mode and cross-platform support. Back up carefully and follow the warning before trimming any world.
Who it suits
It suits Minecraft Java users who need to remove low-usage regions across Windows, macOS, or Linux. Users should understand command-line operation and the warning about new worlds.
Plans and prices
MIT License
Free of charge · provided as-is · no warranty
Read 1 Oct 2026 · github.com
On the record
- Default threshold
- The default deletion threshold is 10 minutes, or 600 seconds, of player time per region.github.com · read 1 Oct 2026
- Dependencies
- The required libraries include cursesplus and anvil-parser2, with windows-curses additionally required for Windows interactive mode.github.com · read 1 Oct 2026
- Interactive mode
- Running without command-line arguments starts an interactive terminal UI for trimming worlds.github.com · read 1 Oct 2026
- License
- The software is released under the MIT License with permission to use, copy, modify, publish, distribute, sublicense, and sell it.github.com · read 1 Oct 2026
- Multiprocessing
- The program uses all available CPU cores by default and supports a custom core count with -c.github.com · read 1 Oct 2026
- Non-Windows installation
- There is no binary for non-Windows operating systems, so users must install Python and the source dependencies.github.com · read 1 Oct 2026
- Progress controls
- It provides a live progress counter and supports -q, -u, and -v output options.github.com · read 1 Oct 2026
- Purpose
- Minecraft World Trimmer clears unused chunks from Minecraft worlds to save storage space.github.com · read 1 Oct 2026
- Release features
- Version 1.1 added interactive mode and a Windows EXE.github.com · read 1 Oct 2026
- Safety limitation
- The README warns never to run the trimmer on a new world because it may destroy chunks containing player data.github.com · read 1 Oct 2026
- Support contact
- The maker's GitHub profile lists [email protected] as a contact address.github.com · read 1 Oct 2026
- Threshold control
- Users can change the threshold with the -t option in seconds.github.com · read 1 Oct 2026
- Trimming method
- It finds low-usage regions and deletes them.github.com · read 1 Oct 2026
- Windows download
- Windows users can download a ZIP containing a Minecraft World Trimmer executable from the GitHub release tab.github.com · read 1 Oct 2026
- World formats
- Interactive mode supports 2011–2025 and 2026 world formats and can discover dimensions, world folders, or a Minecraft saves folder.github.com · read 1 Oct 2026
