Frequently Asked Questions

MCWorldTools is a collection of browser-based tools for Minecraft Java Edition. It includes world file editors, command generators, visual editors for skins, signs, banners, and shields, a recipe viewer, an enchantment builder, a loot table builder, and more. Everything runs in your browser — no downloads needed.

Yes. All file processing happens locally in your browser. Your Minecraft files are never uploaded to a server or stored remotely. You can verify this in your browser's network tab. You are always in control of what gets modified and downloaded.

Open the Level.dat Editor, upload your level.dat file, and make changes using the visual editor. You can modify world name, difficulty, game rules, time, weather, spawn point, and world border. When you're done, download the modified file and replace the original in your world folder. Make sure Minecraft is fully closed before swapping the file.

In singleplayer worlds, the player's data is stored inside level.dat. On servers, each player has a separate file in playerdata/UUID.dat format. The Single Player Editor reads player data from level.dat, while the Server Player Editor reads individual player .dat files. Both let you edit inventory, health, XP, position, and more.

This usually means Minecraft was still running when you replaced the file, so it overwrote your edits on save. Always close Minecraft (or stop the server) completely before replacing edited files. Other causes include editing the wrong file or mismatched UUIDs.

The Command Generator lets you build Minecraft commands through an interactive form. Select a command type (/give, /summon, /effect, /enchant, /attribute, /playsound, /gamerule, etc.), fill in the parameters, and copy the finished command. All item, entity, and effect lists update based on your selected Minecraft version.

The Execute Command Builder helps you create complex /execute command chains by stacking subcommands visually. You can add as, at, positioned, if, unless, rotated, facing, in, and run subcommands, reorder them with drag-and-drop, and copy the final command.

Pick an item, then add any combination of enchantments at any level. The builder shows which enchantments conflict with each other and which ones apply to your chosen item. You can also add a custom name and lore text. Copy the resulting /give command when you're done.

Design custom Minecraft signs with per-line text colors, bold/italic/underline formatting, and glow effects. You can also set click events (run command, open URL, suggest command) and copy events. The live preview shows exactly how your sign will look in-game.

The Tellraw Editor lets you build /tellraw JSON messages visually. Add text components with colors, formatting, click events (run/suggest commands, open URLs), and hover text. You can target specific players with selectors and preview the output before copying.

The Loot Table Builder lets you create Minecraft loot tables for datapacks. You can define pools with weighted entries, add conditions (biome, weather, random chance, killed by player, etc.) and functions (set count, enchant, set name, etc.). It includes a built-in simulator that runs the loot table to show what drops you'd get.

Use the UUID Lookup tool. Enter a Minecraft username and it will return the player's UUID and current skin. You can also download the skin as a PNG file. This uses the public Mojang API.

Yes. The file editors work with server world files — level.dat for world settings and playerdata/UUID.dat for individual players. Command tools generate commands that work in server consoles and command blocks. Just make sure to stop the server before replacing edited files.

Yes — we currently support Mekanism, Farmer's Delight, and Industrial Foregoing with more mods coming soon. You can browse modded item IDs, recipes, blocks, entities, enchantments, and effects. The file editors also read and write modded world files including modded game rules.

We maintain full game data for 25 Minecraft Java versions: 1.19, 1.19.1, 1.19.2, 1.19.3, 1.19.4, 1.20, 1.20.1, 1.20.2, 1.20.4, 1.20.5, 1.20.6, 1.21, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11, and the 26.1 snapshot. Each version has its own validated item, block, entity, enchantment, effect, biome, and recipe data. Individual mod data spans multiple versions depending on the mod. The file editors (level.dat, player data) work with any Minecraft version.

No. MCWorldTools never modifies your files directly. You upload a copy, make edits in the browser, and download the result. You then manually place the file in your Minecraft save folder. Always keep backups before making changes.

Your world files are never uploaded — all editing happens in your browser. We use Google Analytics (with your consent) for basic usage statistics and store contact form submissions. The UUID Lookup tool queries the public Mojang API. See our Privacy Policy for full details.