Worlds and files

Files

The Files tab, under World & Files, is for everything that doesn't fit into the dedicated Mods, Plugins, Data Packs, or Resource Packs sub-tabs. It lets you create arbitrary folders at the server root and then manage files inside them with the same drag-and-drop file manager used throughout Content.

This is useful for mods that need their own directory at the server root (a config folder, a scripts folder, a world-gen data folder). You create the folder once, select it from the dropdown, and then add, rename, or delete files inside it.

Worlds

The Worlds tab shows the server's current world (size and when it last changed) and has two buttons: Import world and Reset world. Both are guarded the same way, since either one replaces a world you may care about.

• The server has to be stopped. The buttons are disabled, with the reason, while it runs.
• Coalstack makes a normal backup first, labelled "Before import/reset", so you can find it in the Backups tab. If that backup fails, nothing is touched.
• You type the server's name to confirm.
• The new world is built beside the old one and swapped in, and rolled back if anything goes wrong, so a failed import can't leave a half-written world.

Importing a World

On Java, pick a .zip or a folder. Coalstack finds level.dat inside it (it can be one folder down) and sets it up as the server's world, bringing the Nether and End along when they're there. On Bedrock, pick a .mcworld, a .zip or a folder; it goes under worlds/ and the server is pointed at it. An archive with no level.dat is rejected with a clear message.

Resetting a World

Reset deletes the world after the backup, and a fresh one generates the next time the server starts. You can enter a seed first.

Limits

Java servers with a custom level-name aren't supported yet: Coalstack expects the standard world, world_nether and world_the_end folders.

Icon & MOTD

Icon & MOTD, a Coalstack Plus tab under World & Files for Java servers, covers the visual identity of your server. You can set a server icon by picking a 64x64 PNG from your computer; Coalstack copies it to the server-icon.png file that Minecraft looks for at the server root. The page shows a live preview of the current icon.

The MOTD (Message of the Day) editor lets you write the text players see in their server list, with a live preview that shows roughly how it will appear in the Minecraft client. MOTD formatting codes using the section sign are supported. Changes are saved to server.properties and take effect the next time the server starts.

To rename the server, use Server Settings on the Server page.

Server Properties

The Server Properties tab, under World & Files, opens with a plain-language "Common settings" section (difficulty, gamemode, max players, PvP, whitelist, online mode, and the server description) for the properties people actually change most. The full key-value table for every other property in server.properties sits below it behind a disclosure.

In that raw table, each row shows the property name on the left and its current value on the right. Editing a value and clicking Save writes the change back to the file immediately. New properties can be added with the input at the bottom.

Changes to most properties only take effect the next time the server starts. A few, like the whitelist and ban list, are read by the server process continuously, but the safe rule of thumb is to restart after making changes here.

Editing server.properties through this page rather than opening the file in Notepad avoids common pitfalls: the app preserves the existing order of properties, keeps comments and blank lines intact, and handles the escaping of special characters correctly. A typical file looks like this:

# Minecraft server properties
difficulty=normal
gamemode=survival
max-players=20
pvp=true
white-list=false
online-mode=true
server-port=25565
motd=A Coalstack server

Config History (Coalstack Plus): every tracked write to this file, and to plugin configs edited through the Marketplace, is saved as a revision. Open the history panel next to the editor to diff a past revision against the current file or revert to it with one click. Only edits made through the app are tracked; a change made outside Coalstack has no entry.

On a Bedrock server the same tab shows Bedrock's own common settings (game mode, difficulty, who new players are, cheats, the allow-list, max players, and so on) above the full table.