How to Trim Your Minecraft World to Reduce File Size
Learn how to remove unused chunks from your world to reduce disk usage and improve performance.
Over time, Minecraft worlds grow as players explore. Trimming removes chunks that have barely been visited, reducing file size and allowing new terrain to generate with updated features after Minecraft updates.
Method 1: MCA Selector (Recommended)
Download your world
Access the XGamingServer panel, stop your server, and download your world.
Install MCA Selector
Download MCA Selector from GitHub (requires Java). Open the application.
Open your world
Go to File → Open and select your downloaded world's region folder.
Filter and select chunks
Go to Tools → Filter Chunks. Useful filters:
| Filter | Value | Effect |
|---|---|---|
InhabitedTime | < 1 minute | Select barely-visited chunks |
Timestamp | < [date] | Select chunks generated before a date |
xPos, zPos | Range values | Select chunks in a geographic area |
Delete selected chunks
Select All → Delete Selected Chunks. These chunks will regenerate with current world generation when explored again.
Re-upload the world
Upload the trimmed world back to your server via Files.
Method 2: WorldBorder Plugin
Install WorldBorder
Upload the WorldBorder plugin to /plugins/ via Files and restart.
Trim outside the border
wb world trimThis deletes all chunks outside the border.
💡 Tip: Trim your world before major Minecraft updates to get new terrain features in previously-explored-but-barely-used areas.
⚠️ Warning: Trimmed chunks are permanently deleted. Always back up via
Backupsbefore trimming.
See also: Add World Border | Reset Chunks
If you need help, join our Discord.
How is this guide?
