WorldSlim

A lightweight chunk save optimization plugin for Paper servers. WorldSlim reduces your world file size by automatically cleaning up chunks that players have barely visited.

How It Works

Minecraft saves every chunk that has ever been generated, even if a player only passed through for a split second. Over time, this causes world folders to grow to tens or even hundreds of gigabytes. WorldSlim solves this by periodically scanning region files and removing chunks with low "inhabited time" — meaning chunks where players spent very little time.

Features

• Automatic Cleanup — Periodically rewrites .mca region files to remove low-activity chunks
• Smart Protection — Chunks are protected from cleanup when players place/break blocks, damage entities, or pick up/drop items
• Fully Configurable — Set your own inhabited time threshold, cleanup interval, per-world settings, and trigger ranges
• Safe & Non-Destructive — Only removes chunks below the configured threshold; loaded chunks are never touched
• Async Processing — All cleanup runs asynchronously with zero impact on server TPS
• Statistics Tracking — Monitor how many chunks have been cleaned and how much space was saved

Commands

Command	Description
/worldslim status	Show plugin status and settings
/worldslim stats	Show cleanup statistics
/worldslim chunk	Show current chunk info
/worldslim cleanup	Manually trigger a cleanup
/worldslim reload	Reload configuration
/worldslim reset	Reset statistics

Alias: /ws

Permissions

Permission	Description	Default
worldslim.use	Basic commands (status, stats, chunk)	Everyone
worldslim.reload	Reload configuration	OP
worldslim.admin	Admin commands (cleanup, reset)	OP

Requirements

• Paper 1.21.x
• Java 21+