Simplex Trimmer

Every Minecraft server administrator eventually faces the same problem: world folders that balloon to gigabytes of data, filled with chunks no player has ever truly inhabited. Exploration, elytra flights, and automated world generation can leave behind vast swaths of terrain that serve no purpose but to consume disk space and slow down backups. Simplex Trimmer is the elegant answer to this bloat, a server utility that puts powerful chunk trimming directly into a friendly graphical interface.

Why Your Server Needs Simplex Trimmer

World files grow relentlessly. Every time a player moves into new territory, the server generates and stores chunks permanently. Over weeks and months, this can add tens of thousands of unnecessary chunks. Simplex Trimmer for Minecraft tackles this by intelligently deleting chunks that players merely passed through, leaving your core bases and builds untouched. The result is often a 40-70% reduction in world size, freeing up precious storage and making backups dramatically faster.

How Simplex Trimmer Works

At its heart, Simplex Trimmer leverages the trusted MCASelector engine to safely edit region files. Instead of wrestling with command-line tools, you control everything through an intuitive inventory-style GUI. The plugin reads Minecraft's native InhabitedTime value—a tick counter that records how long players have spent in each chunk. Chunks with a low InhabitedTime are considered transient and can be removed, while your spawn town or megabase remains completely intact.

Smart Filtering with InhabitedTime

You choose a time threshold, and Simplex Trimmer deletes any chunk where the total player presence falls below that limit. The default options cover every need:

• 30 Seconds (600 ticks) – Safe: removes only flyover terrain generated by elytra or quick passes.
• 1 Minute (1200 ticks) – Balanced: clears paths traveled briefly without stopping.
• 5 Minutes (6000 ticks) – Aggressive: deletes areas where nobody paused to build or mine.
• 10 Minutes (12000 ticks) – Very Aggressive: keeps only well-established bases and farms.

Compatibility and Supported Platforms

Simplex Trimmer is built for modern Minecraft server software running version 1.21 and above. It shines on Paper, the recommended platform for best performance and stability. Purpur and Pufferfish are fully supported and work without any extra configuration. Spigot is not recommended because it may lack required libraries, and Folia is incompatible due to its threaded region architecture. Proxy solutions like Velocity and BungeeCord do not hold world data, so the plugin cannot function there.

How to Install Simplex Trimmer

Getting started is straightforward. First, download Simplex Trimmer from the official plugin page and place the JAR file into your server's plugins folder. Restart the server, and the plugin will automatically download the necessary MCASelector tool on first run. If you manage your server through the foxygame.net launcher, you can add Simplex Trimmer to your instance with a single click from the add-on catalog, and it will stay updated automatically. For manual installations, always ensure you are running a compatible server jar and that you have a full backup before proceeding.

Using the Trimming GUI

Once installed, the command /trimworld opens the main interface. You must be an operator or have the trimmer.admin permission. The menu shows clickable icons for each world; selected worlds glow to confirm your choice. Tap the clock icon to pick a time threshold, then click the emerald block to start. A safety lock requires you to type CONFIRM in chat, after which all players are kicked, the server enters maintenance mode, and the trim begins. The server restarts automatically when finished, and a detailed chat report shows exactly how many megabytes were reclaimed.

Configuration and Expert Mode

Simplex Trimmer works out of the box, but you can tweak its behavior in config.yml. Adjust the heap memory allocated to the trimming process (default 4G) or disable anonymous metrics. For power users, Expert Mode allows you to define custom tick thresholds beyond the presets, giving you surgical control over which chunks survive. The configuration also lets you customize all chat messages to match your server's style.

Final Thoughts

Simplex Trimmer transforms a tedious maintenance chore into a few clicks. By reclaiming gigabytes of wasted space, it keeps your server lean, your backups snappy, and your players focused on the areas that matter. Always remember the golden rule: create a full backup before every trim. Once chunks are deleted, they regenerate from the original seed if visited again, so your world's integrity remains safe. For any server owner serious about long-term world management, Simplex Trimmer is an indispensable tool.