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The Minecraft Web Client provides several built-in commands that can be executed in the game chat or browser console.

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Built-in Chat Commands

These commands are available in the in-game chat when playing in singleplayer mode or hosting a world.

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Export/Download World

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/export
command
Export the currently loaded world as a ZIP file. The world is automatically saved before export.Aliases: /downloadExample:
/export
The world is first saved to browser memory, then packaged into a ZIP file that will be downloaded to your device.

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Publish/Share World

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/publish
command
Open your singleplayer world to the internet via P2P connection. Creates a shareable join link that is automatically copied to your clipboard.Aliases: /shareExample:
/publish
This uses peer-to-peer networking. Your connection information will be shared with players who join.

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Close P2P Connection

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/close
command
Close the P2P connection and stop allowing other players to join your world.Example:
/close

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Manual Save

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/save
command
Manually save the current world to browser memory. Useful when auto-save is disabled.Example:
/save
After saving, you’ll see a confirmation message: “Saved to browser memory”

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Get Position

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/pos
command
Copy your current position to clipboard. Supports both player position and block position.Arguments:
  • block - Get the position of the block you’re looking at (optional)
Examples:
/pos
/pos block
The position is formatted as: X Y Z with 2 decimal places.

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Download Mesher Log

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/mesherlog
command
Download performance logs from the chunk mesher workers. Useful for debugging rendering performance.Example:
/mesherlog
This command is available in both singleplayer and multiplayer modes.

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Console Debug Functions

These functions are available in the browser console (F12) for advanced debugging.

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Debug Toggle

debugToggle
Enables all debug messages. Warning: This will start packet spam in the console.
Instead of enabling all debug messages, consider using options.debugLogNotFrequentPackets to filter packet spam.

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Debug Top Packets

debugTopPackets
Use with JSON.stringify() to see what packets were received/sent by name. Example: 
JSON.stringify(debugTopPackets)

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Debug Changed Options

debugChangedOptions
See what options have been changed from their default values. Don’t change options directly here - use the options object instead.

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Debug Scene Chunks

debugSceneChunks
Similar to world.sectionObjects, but shows chunks relative to your current position (e.g., 0,0 is the current chunk).

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Debug Server/Client Packet Names

debugServerPacketNames
debugClientPacketNames
Get all available packet names for the current server version.

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Availability

  • Commands marked as alwaysAvailable work in both singleplayer and multiplayer
  • Commands without this flag only work in singleplayer mode
  • /pos and /mesherlog are available in all modes
  • World management commands (/export, /save, /publish) only work in singleplayer

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See Also

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